Mortality by road traffic injuries in Brazil (2000–2016): capital cities versus non-capital cities

Érika Carvalho de Aquino José Leopoldo Ferreira Antunes Otaliba Libânio de Morais NetoAbout the authors

ABSTRACT

OBJECTIVES:

To compare the magnitude and trend of mortality by road traffic injuries (RTI) in the capitals and other municipalities of each Brazilian state between 2000 and 2016.

METHODS:

A time series analysis of mortality rates by RTI standardized by age was performed, comparing the capitals and the cluster of non-capital municipalities in each state. Data on deaths were obtained from the Sistema de Informações sobre Mortalidade (SIM – Mortality Information System). RTI deaths were considered to be those, whose root cause was designated by ICD-10 codes V01 to V89, with redistribution of garbage codes. To estimate mortality rates, we used the population projections of the Brazilian Institute of Geography and Statistics (IBGE) from 2000 to 2015 and the population estimated by polynomial interpolation for 2016. The trend analysis was performed using the Prais-Winsten method, using the Stata 14.0 program.

RESULTS:

There were 601,760 deaths due to RTI in the period (114,483 of residents in capital cities). Mortality by RTI did not present an increasing trend in any of the Capitals in the period under study. Among non-capital municipalities, the trend was growing in 14 states. The greatest increase was observed in Piaui (AIR = 7.50%; 95%CI 5.50 – 9.60). There was a decreasing trend in RTI mortality in 14 capitals, among which Curitiba showed the greatest decrease (AIR = −4.82%; 95%CI −6.61 – −2.92). Only São Paulo and Rio Grande do Sul showed a decreasing trend in mortality by RTI in non-capital cities (AIR = 2.32%; 95%CI −3.32 – −1.3 and AIR = 1.2%, 95%CI −2.41 – 0.00, respectively).

CONCLUSIONS:

We conclude that RTI mortality rates in non-capital cities in Brazil showed alarming trends when compared with those observed in capital cities. The development of effective traffic safety actions is almost always limited to Brazilian capitals and large cities. Municipalities with higher risk should be prioritized to strengthen public policies for prevention and control.

DESCRIPTORS:
Accidents, Traffic, mortality; Spatial Analysis; Time Series Studies

INTRODUCTION

Road traffic injuries (RTI) represent one of the leading causes of morbidity and mortality worldwide, generating 20 to 50 million injuries and 1.2 million deaths every year11. Zhu M, Cummings P, Zhao S, Rice T. The association between graduated driver licensing laws and travel behaviors among adolescents: an analysis of US National Household Travel Surveys. BMC Public Health. 2016;647. https://doi.org/10.1186/s12889-016-3206-7
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. Thus, this event represents an important global public health problem and requires joint efforts to promote effective preventive measures22. Paixão LMMM, Gontijo ED, Mingoti SA, Costa DAS, Friche AAL, Caiaffa WT. Óbitos no trânsito urbano: qualificação da informação e caracterização de grupos vulneráveis. Cad Saude Publica. 2015;31 Supl 1:92-106. https://doi.org/10.1590/0102-311X00081314
https://doi.org/10.1590/0102-311X0008131...
.

Brazil ranks fifth among the countries with the highest number of deaths from RTI. It is estimated that approximately 40,000 deaths from this cause occur annually in the country. Considering the serious injuries, the annual number of victims exceeds 150,000, making up total costs of around R$ 28 billion/year22. Paixão LMMM, Gontijo ED, Mingoti SA, Costa DAS, Friche AAL, Caiaffa WT. Óbitos no trânsito urbano: qualificação da informação e caracterização de grupos vulneráveis. Cad Saude Publica. 2015;31 Supl 1:92-106. https://doi.org/10.1590/0102-311X00081314
https://doi.org/10.1590/0102-311X0008131...
.

The country has had high mortality rates from RTI since the 1950s. Most of these occurrences are related to the increase in the fleet of cars, the inadequacy in the adaptation of the traffic environment to accommodate it and the deficiencies in the processes of education and traffic control. With the promulgation of the Brazilian Traffic Code in 1998, more restrictive rules were put into practice and a better organization of traffic management in cities was promoted. Thus, the number of accidents and deaths resulting from RTI began to decrease, even with the continuous growth of the vehicle fleet. Between 1996 and 2000, RTI deaths fell by 17% in the country33. Souza ER, Minayo MCS, Franco LG. Avaliação do processo de implantação e implementação do Programa de Redução da Morbimortalidade por Acidentes de Trânsito. Epidemiol Serv Saude. 2007;16(1):19-31. https://doi.org/10.5123/S1679-49742007000100003
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Since then, several strategies have been implemented to curb traffic violence at the national, state and municipal levels. After the reduction period, however, the mortality rate from RTI was stable between the years 2000 and 2015. Analyzing the condition of the victim, the trend has been increasing for car occupants and motorcyclists and decreasing for pedestrians. In 2000, users with the most vulnerable condition (pedestrians, cyclists and motorcyclists) accounted for 41% of RTI deaths in Brazil. In 2015, this percentage increased to 53%, with a 400% increase in the mortality rate44. Ministério da Saúde (BR), Secretaria de Vigilância em Saúde, Departamento de Vigilância de Doenças e Agravos Não Transmissíveis e Promoção da Saúde. Saúde Brasil 2017 - Uma análise da situação de saúde e os desafios para o alcance dos Objetivos do Desenvolvimento Sustentável. Brasília, DF; 2018. p.1-4.. Thus, the harmful effects of the increase in the rate of motorization, especially the increase in mortality, were superimposed on the effect of Traffic Safety actions55. Morais Neto OL Beniz LAF, Rodrigues FR, Botacin CF, Mandacarú PMP, Oliveira IV, et al. Tendências da mortalidade por acidentes de trânsito pós redução do IPI. Rev Goiana Med. 2016;49(1):6-10..

It is important to emphasize that there is a great inequality among Brazilian municipalities regarding the implementation of strategies for the prevention of traffic mortality. Many are implemented only, or more rigorously, in the most populous capitals and municipalities of each state. In this sense, an important initiative is the life in transit program, initially implemented in five Brazilian capitals in 2010. Later, it was expanded to the other capitals of the country, municipalities with more than one million inhabitants and the municipalities of São José dos Pinhais and Foz do Iguaçu, in Paraná66. Morais Neto OL, Silva MMA, Lima CM, Malta DC, Silva Jr JB. Projeto Vida no Trânsito: avaliação das ações em cinco capitais brasileiras, 2011-2012. Epidemiol Serv Saude. 2013;22(3):373-82. http://doi.org/10.5123/S1679-49742013000300002
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,77. Silva MMA, Morais Neto OL, Lima CM, Malta DC, Silva Jr JB. Projeto Vida no Trânsito - 2010 a 2012: uma contribuição para a Década de Ações para a Segurança no Trânsito 2011-2020 no Brasil. Epidemiol Serv Saude. 2013;22(3):531-6. https://doi.org/10.5123/S1679-49742013000300019
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Moreover, we must mention the inequalities regarding the integration of municipalities to the National Transit System (SNT). Integration is mandatory, as determined by Article 333 of the Brazilian Traffic Code (CTB)88. Presidência da República, Casa Civil, Subchefia para Assuntos Jurídicos. Código de Trânsito Brasileiro: Capítulo 20 – Disposições finais e transitórias: Artigo 333. Determina que o CONTRAN estabelecerá, em até cento e vinte dias após a nomeação de seus membros, as disposições previstas nos arts. 91 e 92, que terão de ser atendidas pelos órgãos e entidades executivos de trânsito e executivos rodo. Brasília, DF; 1997 [cited 2018 Aug 13]. Available from: http://www.ctbdigital.com.br/artigo/art333
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, regulated by Resolution No. 560 of the National Traffic Council, of October 15, 2015. Non-integration prevents the municipality from exercising the powers set out in Article 24 of the CTB. Thus, it is prevented from implementing traffic road signs, inspecting or charging road users99. Brasil. Lei N° 9503, de 23 de setembro de 1997. Artigo 24 do Código de Trânsito Brasileiro - Estabelece as competências dos órgãos e entidades executivos de trânsito dos Municípios, no âmbito de sua circunscrição. Brasília, DF; 1997 [cited 2018 Aug 13]. Available from: https://www.jusbrasil.com.br/topicos/10624984/artigo-24-da-lei-n-9503-de-23-de-setembro-de-1997
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and from implementing proven effective measures to reduce morbidity and mortality by RTI, such as those contained in the Dry Law (Law No. 11,705, of June 19, 2008)1010. Brasil. Lei N° 11.705, de 19 de Junho de 2008. Altera a Lei n° 9.503, de 23 de setembro de 1997, que ‘institui o Código de Trânsito Brasileiro’, e a Lei n° 9.294, de 15 de julho de 1996, que dispõe sobre as restrições ao uso e à propaganda de produtos fumígeros, bebidas alcoólicas, medicamentos, terapias e defensivos agrícolas, nos termos do § 4o do art. 220 da Constituição Federal, para inibir o consumo de bebida alcoólica por condutor de veículo automotor, e dá outras providências. Brasília, DF; 2008 [cited 2018 Aug 13]. Available from: http://www.planalto.gov.br/ccivil_03/_ato2007-2010/2008/lei/l11705.htm
http://www.planalto.gov.br/ccivil_03/_at...
and its revision (Law No. 12,760, of December 20, 2012)1111. Brasil. Lei N° 12.760, de 20 de dezembro de 2012. Altera a Lei N° 9.503, de 23 de setembro de 1997, que institui o Código de Trânsito Brasileiro. Brasília, DF; 2012 [cited 2018 Jul 27]. Available from: http://www.planalto.gov.br/ccivil_03/_Ato2011-2014/2012/Lei/L12760.htm
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Despite this, in 2018, of the 5,575 Brazilian municipalities, 3,982 were not yet integrated into the SNT1212. Ministério da Infraestrutura (BR)]. DENATRAN: municipalização. Brasília, DF; 2016 [cited 2018 Sep 9]. Available from: https://infraestrutura.gov.br/municipalizacao.html
https://infraestrutura.gov.br/municipali...
. All 27 Brazilian capitals are now integrated into the SNT. In the state of Roraima, only the capital (Boa Vista) has municipal transit99. Brasil. Lei N° 9503, de 23 de setembro de 1997. Artigo 24 do Código de Trânsito Brasileiro - Estabelece as competências dos órgãos e entidades executivos de trânsito dos Municípios, no âmbito de sua circunscrição. Brasília, DF; 1997 [cited 2018 Aug 13]. Available from: https://www.jusbrasil.com.br/topicos/10624984/artigo-24-da-lei-n-9503-de-23-de-setembro-de-1997
https://www.jusbrasil.com.br/topicos/106...
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Considering that the reduction of injuries and deaths caused by traffic is one of the greatest current challenges in Brazil, studies that estimate the factors related to mortality by this cause with a greater degree of detail are essential. Such studies can identify population groups at risk and guide traffic safety interventions1313. Ministério da Saúde (BR), Secretaria de Vigilância em Saúde, Departamento de Vigilância de Doenças e Agravos Não Transmissíveis e Promoção da Saúde. Saúde Brasil 2017: uma análise da situação de saúde e os desafios para o alcance dos Objetivos de Desenvolvimento Sustentável. Brasília, DF; 2018 [citado 2018 Jul 27]. Available from: http://bvsms.saude.gov.br/bvs/publicacoes/saude_brasil_2017_analise_situacao_saude_desafios_objetivos_desenvolvimento_sustetantavel.pdf
http://bvsms.saude.gov.br/bvs/publicacoe...
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Brazilian capitals have differences in population size, road structure and traffic intensity. However, they all centralize, to a greater or lesser extent, the economy of their states. When comparing capital and non-capital cities within the same state, differences of density and, in most cases, population size appear. In addition, the replacement of animal traction vehicles by motor vehicles has been observed. This change is most prominent in non-capital municipalities1313. Ministério da Saúde (BR), Secretaria de Vigilância em Saúde, Departamento de Vigilância de Doenças e Agravos Não Transmissíveis e Promoção da Saúde. Saúde Brasil 2017: uma análise da situação de saúde e os desafios para o alcance dos Objetivos de Desenvolvimento Sustentável. Brasília, DF; 2018 [citado 2018 Jul 27]. Available from: http://bvsms.saude.gov.br/bvs/publicacoes/saude_brasil_2017_analise_situacao_saude_desafios_objetivos_desenvolvimento_sustetantavel.pdf
http://bvsms.saude.gov.br/bvs/publicacoe...
,1414. Vasconcellos EA. Risco no trânsito, omissão e calamidade: impactos do incentivo à motocicleta no Brasil. São Paulo: Annablume; 2016.. Thus, although the capitals cannot be analyzed as a single cluster, among questions related to urban mobility, the following question draws attention: are there inequalities, regarding the magnitude and trend, between the mortality by RTI in the capital and non-capital cities of each Brazilian state?

Thus, our study aims to estimate the magnitude and trend of RTI mortality according to the condition of the victim, comparing the capitals to the other municipalities of each Brazilian state, from 2000 to 2016.

METHODS

A time series study of standardized RTI mortality rates in Brazilian municipalities was conducted from 2000 to 2016.

Data on deaths were obtained from the Sistema de Informações sobre Mortalidade (SIM – Mortality Information System), by the website of the Department of Informatics1515. Ministério da Saúde (BR), Portal da Saúde DATASUS. SIM - Sistema de informações sobre mortalidade. Brasília, DF; 2015. of the Unified Health System (Datasus)1616. Ministério da Saúde (BR), Departamento de Informática do SUS – DATASUS. Tabnet. Brasília, DF; 2015.. Deaths from RTI were those whose underlying cause was described in the death declaration, according to the international disease code in its tenth edition (ICD-10), with codes V01 to V89.

The annual estimates of the resident population of IBGE1717. Instituto Brasileiro de Geografia e Estatística. Projeção da população. Rio de Janeiro: IBGE; 2013 [cited 2018 Jul 27]. Available from: https://datasus.saude.gov.br/populacao-residente/
https://datasus.saude.gov.br/populacao-r...
, also collected from the Datasus website with the TabNet tool, were also used1616. Ministério da Saúde (BR), Departamento de Informática do SUS – DATASUS. Tabnet. Brasília, DF; 2015.. The 2016 population was estimated by the polynomial interpolation method1818. Givisiez GHN. Introdução a métodos de estimativas e interpolações populacionais. Belo Horizonte, MG: Associação Brasileira de Estudos Populacionais; 2015. p.45–70..

The annual mortality rates from RTI were estimated per 100,000 inhabitants standardized by age. This indicator was estimated according to the condition of the victim (pedestrians: V01 to V09; occupants of motorcycles or tricycles: V20 to V39; and occupants of cars or trucks: V40 to V59), municipality of residence (capital or non-capital) and year of death (2000 to 2016). Thus, it was possible to estimate the specific mortality by road traffic injuries according to the condition of the victim.

The standardization was done by the direct method, using as standard the Brazilian population in the year 2010. This method made it possible to compare the indicators both during the period and between the geographical units under study. In this sense, the results of the capitals were compared with those of the non-capital municipalities, considered as a single cluster for each state. The Federal District was excluded from the analyses because it consists of only one municipality (Brasilia).

To avoid underestimation of deaths according to the condition of the victim caused by the garbage codes, the deaths possibly related to transport accidents, but with non-specific underlying cause (V87 to V89, V99 and Y32 to Y34) were redistributed proportionally among the specific groups (pedestrians, occupants of motorcycles or tricycles, occupants of cars or trucks and other means of transport). For such purpose, the proportion of deaths, whose root cause was coded in each of these specific groups was estimated, and this proportion was applied to garbage codes. The redistribution of garbage codes related to transport accidents is recommended to correct the underestimation of rates according to accidents with specific causes1919. Malta DC, Felisbino-Mendes MS, Machado IE, Passos VMA, Abreu DMX, Ishitani LH, et al. Fatores de risco relacionados à carga global de doença do Brasil e Unidades Federadas, 2015. Rev Bras Epidemiol. 2017;20 Supl 1:217-32. https://doi.org/10.1590/1980-5497201700050018
https://doi.org/10.1590/1980-54972017000...
,2020. França EB, Passos VMA, Malta DC, Duncan BB, Ribeiro ALP, Guimarães MDC, et al. Cause-specific mortality for 249 causes in Brazil and states during 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015. Popul Health Metr. 2017;15(1):39. https://doi.org/10.1186/s12963-017-0156-y
https://doi.org/10.1186/s12963-017-0156-...
. Although the group “other means of transport” participates in the process of redistribution of deaths, this category was not analyzed to make the final value of deaths more plausible.

When the root cause of all RTI deaths occurred in a given year and municipality were described with garbage codes, it was not possible to perform proportional redistribution. These cases were then considered only in the analysis of all deaths due to RTI, and not in the analysis according to the condition of the victim.

This method of distribution is used by the Brazilian Ministry of Health. The flow chart with information on the number of deaths original and after redistribution is already described.

To estimate trends, the Prais-Winsten linear regression method was used. This is a method outlined for data that may be influenced by serial autocorrelation, which often occurs in population data measurements. According to Antunes and Cardoso2121. Antunes JLF, Cardoso MRA. Uso da análise de séries temporais em estudos epidemiológicos. Epidemiol Serv Saude. 2015;24(3):565-76. https://doi.org/10.5123/S1679-49742015000300024
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, linear autocorrelation breaks with one of the main premises of simple linear regression analysis: the independence of residues. By Prais-Winsten regression, it was possible to obtain the value of the regression slope coefficient. P = 0.05 was adopted as a critical value to determine if the trend was significant.

The average annual increase rate (AIR) was estimated using the following formula2121. Antunes JLF, Cardoso MRA. Uso da análise de séries temporais em estudos epidemiológicos. Epidemiol Serv Saude. 2015;24(3):565-76. https://doi.org/10.5123/S1679-49742015000300024
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:

Taxa de incremento anual=1+10b,

b corresponds to the slope coefficient of the line obtained in the regression analysis relating the logarithm on a decimal basis of the mortality rate with the year of occurrence.

The 95% confidence interval of the average annual percentage increase rate in the period was estimated based on the following formula2121. Antunes JLF, Cardoso MRA. Uso da análise de séries temporais em estudos epidemiológicos. Epidemiol Serv Saude. 2015;24(3):565-76. https://doi.org/10.5123/S1679-49742015000300024
https://doi.org/10.5123/S1679-4974201500...
:

IC95%=1+10(b±t×EP),

t is the value at which the Student t distribution presents 16 degrees of freedom at a two-tailed confidence level of 95% and SE is the standard error of b estimate provided by the regression analysis. Degrees of freedom are estimated by the formula n-1; n is the number of elements in the sample2121. Antunes JLF, Cardoso MRA. Uso da análise de séries temporais em estudos epidemiológicos. Epidemiol Serv Saude. 2015;24(3):565-76. https://doi.org/10.5123/S1679-49742015000300024
https://doi.org/10.5123/S1679-4974201500...
. In our article, n was equal to 17, considering that a period of 17 years (2000 to 2016) was analyzed.

Regression analyses were performed using Stata 14.0 software (StataCorp. 2015. Stata Statistical Software: Release 14. College Station, TX: StataCorp LP). The estimate of the annual increase rate was performed using Microsoft Excel 2007. The graphics were developed using SPSS 25.0 software (IBM Corp. Released 2017. IBM SPSS Statistics for Windows, Version 25.0. Armonk, NY: IBM Corp.).

Submission to the Research Ethics Committee was not necessary, since this is a study that uses secondary data, without identifying the participants. Resolution No. 466 of the National Health Council of December 12, 2012 was complied with.

RESULTS

Between 2000 and 2016, there were 485,015 deaths due to traffic injuries in Brazil. Assigned to garbage codes V87 to V89, there were 154,090 deaths, redistributed among deaths from traffic injuries with specified victim status. For V99 there were 10,598 deaths, of which 10,534 were added to the analysis. The indeterminate external causes (Y32 to Y34) had 103,354 deaths, of which 37,401 deaths were redistributed to the analysis, accounting for 202,025 garbage codes redistributed to traffic injuries. In total, 38,717 deaths were excluded, whose municipality of residence of the victim was unknown. Thus, 648,322 deaths were analyzed. In 206,338 (31.82%) of these deaths the victim was a pedestrian, in 189,994 (29.30%) the victim was an occupant of motorcycle or tricycle and in 188,569 (29.08%) the victim was an occupant of automobile or pickup truck.

Also considering the period from 2000 to 2016, among the Brazilian capitals, the highest mortality rate by standardized RTI occurred in Boa Vista, state of Roraima (RR) (41.6/100,000 inhabitants). The highest specific mortality rate of pedestrians was observed in Macapá, state of Amapá (AP) (14.7 / 100,000 inhabitants). In the condition of occupant of motorcycles or tricycles, the highest mortality also occurred in Boa Vista, RR (16.1 / 100,000 inhabitants). The highest specific rate for the condition of car occupants was found in Palmas, state of Tocantins (TO) (11.3 / 100,000 inhabitants), as shown in Figure 1.

Figure
Mortality due to General Road traffic injuries and the condition of the victim according to the municipality of residence (capital and non-capital). Brazil, 2000 and 2016.

Among the non-capital municipalities, those that presented the highest mortality rate by standardized RTI were those in the state of Mato Grosso (35.6 deaths/100,000 inhabitants). Even among non-capital municipalities, the highest specific mortality rate in pedestrian condition occurred in Rio de Janeiro (10.2 / 100,000 inhabitants). In the condition of motorcycle or tricycle occupant, the highest rate was observed in the municipalities of Piauí (17.2 / 100,000 inhabitants). The highest mortality rate of a car or truck occupant occurred in the municipalities of Mato Grosso (12.1 / 100,000 inhabitants), as shown in Figure 1.

Mortality by RTI did not present an increasing trend in any of the capitals in the period. Among non-capital municipalities, an increasing trend was observed in 14 states. In the Northern region: Acre (AIR= 4.8 deaths / 100,000 inhabitants), Amazonas (AIR = 4.7 deaths / 100 thousand inhabitants), Pará (AIR = 4.1 deaths/100,000 inhabitants), Rondônia (AIR = 2.1 deaths/ 100,000 inhabitants) and Tocantins (AIR = 3.5 deaths/ 100,000 inhabitants). In the Northeast region, all states, except Rio Grande do Norte, showed an increasing trend of mortality by RTI in non-capital cities. In the Southeast and South regions, there was no increasing trend of mortality in the states under study. In the Midwest Region, there was an increasing trend only in Mato Grosso (AIR = 1.0 death/ 100,000 inhabitants), as shown in Table 1.

Table 1
Annual increase rate of mortality by RTI according to the city of residence of the victim. Brazil, 2000–2016.

The specific mortality rate for pedestrians did not show an increasing trend in any of the states analyzed. However, rates were stable in four capitals of the Northern Region (Macapá, Porto Velho, Boa Vista and Palmas) and one capital of the Northeast Region (Salvador). In nine states of the North and Northeast regions, rates were stable in non-capital municipalities. In the Midwest, Southeast and South regions, specific mortality in pedestrian condition showed a decreasing trend in all analyses (Table 2).

Table 2
Annual increase rate of mortality by RTI according to the city of residence of the victim. Brazil, 2000–2016.

The mortality rate of occupants of motorcycles or tricycles did not show a decreasing trend in any of the states. There was a steady trend in rates in 10 capitals. In the Northern Region: Rio Branco, Porto Velho and Boa Vista. In The Northeast Region: Aracaju. In the Southeast Region: Vitória and Belo Horizonte. In The Midwest Region: Goiânia. In the Southern Region, all capitals showed a steady trend. Considering the non-capital municipalities, only four states showed a steady trend in mortality rates for motorcycle or tricycle occupants: Roraima, Paraná, Rio Grande do Sul and Santa Catarina (Table 3).

Table 3
Annual increase rate of mortality of motorcycle/tricycle occupants according to the city of residence of the victim. Brazil, 2000–2016.

Of the Capitals, the only one that showed an increasing trend of mortality of occupants of cars or trucks was Teresina (AIR = 9.5 deaths/100,000 inhabitants). Among the non-capital municipalities, nine showed an increasing trend. In the Northern Region: Amazonas (AIR = 5.8 deaths/100,000 inhabitants), Pará (AIR = 1.5 deaths/100,000 inhabitants) and Tocantins (AIR = 2.4 deaths/100,000 inhabitants). In the Northeast Region: Ceará (AIR = 2.9 deaths/100,000 inhabitants), Paraíba (AIR = 5.1 deaths/100,000 inhabitants) and Piauí (AIR = 14.0 deaths/100,000 inhabitants). In the Southeast Region: Minas Gerais (AIR = 2.6 deaths/100,000 inhabitants). In the Southern Region: Rio Grande do Sul (AIR = 2.1 deaths/100,000 inhabitants). In the Midwest Region: Mato Grosso do Sul (AIR = 4.6 deaths/100,000 inhabitants). There was a decrease in the mortality of occupants of cars or trucks in six capitals. In the Northeast: Natal (AIR = −4.3 deaths/100,000 inhabitants) and Aracaju (AIR = −6.7 deaths/100,000 inhabitants). In the Southern Region: Curitiba (AIR = −5.4 deaths/100,000 inhabitants) and Florianópolis (AIR = −5.5 deaths/100,000 inhabitants). In the Midwest Region: Goiânia (AIR = −3.1 deaths/100,000 inhabitants) and Cuiabá (AIR = −1.9 deaths/100,000 inhabitants). Among the non-capital municipalities, there was a decrease in the rate only in Rio Grande do Norte (AIR = −4.3 deaths/100,000 inhabitants) and Sergipe (AIR = −3.7 deaths/100,000 inhabitants), both in the Northeast Region. The other stated under analysis showed a steady trend of specific mortality rates of car or truck occupants in the period (Table 4).

Table 4
Annual increase rate of mortality of occupants of cars or trucks according to the city of residence of the victim. Brazil, 2000–2016.

DISCUSSION

From 2000 to 2016, non-capital cities presented unfavorable trends in standardized mortality rates by RTI compared to the capitals of their respective states. This discrepancy was most pronounced in the poorest macro-regions of the country (North and Northeast). Accidents involving motorcycles were the category, in which a more pronounced increasing trend was observed, which reflects the internalization of the use of this type of vehicle in the country.

There was a preponderance of a steady trend (observed in 12 capitals and 10 non-capital clusters) or a reduction (observed in 14 capitals and 2 non-capital clusters) of mortality rates by RTI in Brazil in the period. This trend may have been caused by improvements in road infrastructure, a reduction in average speed (both by increasing the flow of vehicles and by implementing speed control and surveillance measures), an increase in the use of safety equipment (helmet, seat belt, child control equipment, etc.), decreased risk factors such as “drinking and driving” and also by improving pre-hospital and hospital care for victims1313. Ministério da Saúde (BR), Secretaria de Vigilância em Saúde, Departamento de Vigilância de Doenças e Agravos Não Transmissíveis e Promoção da Saúde. Saúde Brasil 2017: uma análise da situação de saúde e os desafios para o alcance dos Objetivos de Desenvolvimento Sustentável. Brasília, DF; 2018 [citado 2018 Jul 27]. Available from: http://bvsms.saude.gov.br/bvs/publicacoes/saude_brasil_2017_analise_situacao_saude_desafios_objetivos_desenvolvimento_sustetantavel.pdf
http://bvsms.saude.gov.br/bvs/publicacoe...
. The reduction in the magnitude of pedestrian mortality follows a worldwide trend and is related to these same factors22. Paixão LMMM, Gontijo ED, Mingoti SA, Costa DAS, Friche AAL, Caiaffa WT. Óbitos no trânsito urbano: qualificação da informação e caracterização de grupos vulneráveis. Cad Saude Publica. 2015;31 Supl 1:92-106. https://doi.org/10.1590/0102-311X00081314
https://doi.org/10.1590/0102-311X0008131...
,2222. Morais Neto OL, Montenegro MMS, Monteiro RA, Siqueira Júnior JB, Silva MMA, Lima CM, et al. Mortalidade por acidentes de transporte terrestre no Brasil na última década: tendência e aglomerados de risco. Cienc Saude Coletiva. 2012;17(9):2223-36. https://doi.org/10.1590/S1413-81232012000900002
https://doi.org/10.1590/S1413-8123201200...
. The reduction can also be explained by the expansion of traffic education campaigns and the emphasis on the use of the pedestrian crossing.2323. Andrade SSCA, Mello-Jorge MHP. Mortality and potential years of life lost by road traffic injuries in Brazil, 2013. Rev Saude Publica. 2016;50:59. https://doi.org/10.1590/S1518-8787.2016050006465
https://doi.org/10.1590/S1518-8787.20160...

According to the Statistical Yearbook of Personal Injury Insurance caused by land-based motor vehicles, there was a reduction in the number of compensation paid for deaths in traffic accidents throughout Brazil since 2012. Souza et al.2424. Souza MFM, Malta DC, Conceição GMS, Silva MMA, Gazal-Carvalho C, Morais Neto OL. Análise descritiva e de tendência de acidentes de transporte terrestre para políticas sociais no Brasil. Epidemiol Serv Saude. 2007;16(1):33-44. https://doi.org/10.5123/S1679-49742007000100004
https://doi.org/10.5123/S1679-4974200700...
reported an increase in the standardized mortality rate from motorcycle accidents and hit-and-run accidents in the period from 1980 to 2003 in Brazil. In the same period, the authors observed a reduction in mortality due to accidents involving other means of land transport. Morais Neto et al.2222. Morais Neto OL, Montenegro MMS, Monteiro RA, Siqueira Júnior JB, Silva MMA, Lima CM, et al. Mortalidade por acidentes de transporte terrestre no Brasil na última década: tendência e aglomerados de risco. Cienc Saude Coletiva. 2012;17(9):2223-36. https://doi.org/10.1590/S1413-81232012000900002
https://doi.org/10.1590/S1413-8123201200...
reported that the mortality rate from RTI in Brazil ranged from 18.2 per 100,000 inhabitants in 2000 to 22.54 per 100,000 inhabitants in 2010, representing an increase of 22.54%. Scolari et al.2525. Scolari GAS, Derhun FM, Rossoni DF, Mathias TAF, Fernandes CAM, Carreira L. Tendência da mortalidade por acidentes de transporte terrestre em idosos no Brasil. Cogitare Enferm. 2017 [cited 2018 Sep 3];22(3):1-9. Available from: http://revistas.ufpr.br/cogitare/article/view/50170
http://revistas.ufpr.br/cogitare/article...
observed a reduction in the RTI mortality rate in Brazil between 2006 and 2008, both considering as denominator the number of inhabitants and considering the vehicle fleet.

The marked increase in mortality of motorcyclists, especially in the North, Northeast and Midwest regions, may be related to the rapid growth of the vehicle fleet. Although it occurred throughout the country, it was most highlighted in the three regions cited77. Silva MMA, Morais Neto OL, Lima CM, Malta DC, Silva Jr JB. Projeto Vida no Trânsito - 2010 a 2012: uma contribuição para a Década de Ações para a Segurança no Trânsito 2011-2020 no Brasil. Epidemiol Serv Saude. 2013;22(3):531-6. https://doi.org/10.5123/S1679-49742013000300019
https://doi.org/10.5123/S1679-4974201300...
,2626. Martins ET, Boing AF, Peres MA. Mortalidade por acidentes de motocicleta no Brasil: análise de tendência temporal, 1996-2009. Rev Saude Publica. 2013;47(5):931-41. https://doi.org/10.1590/S0034-8910.2013047004227
https://doi.org/10.1590/S0034-8910.20130...
2929. Lima MLC, Cesse EAP, Abath MB, Oliveira Júnior FJM. Tendência de mortalidade por acidentes de motocicleta no Estado de Pernambuco, no período de 1998 a 2009. Epidemiol Serv Saude. 2013;22(3):395-402. https://doi.org/10.5123/S1679-49742013000300004
https://doi.org/10.5123/S1679-4974201300...
. Mainly in inland municipalities, the motorcycle has been used as a replacement for non-motorized vehicles, such as bicycles and animal-traction vehicles1313. Ministério da Saúde (BR), Secretaria de Vigilância em Saúde, Departamento de Vigilância de Doenças e Agravos Não Transmissíveis e Promoção da Saúde. Saúde Brasil 2017: uma análise da situação de saúde e os desafios para o alcance dos Objetivos de Desenvolvimento Sustentável. Brasília, DF; 2018 [citado 2018 Jul 27]. Available from: http://bvsms.saude.gov.br/bvs/publicacoes/saude_brasil_2017_analise_situacao_saude_desafios_objetivos_desenvolvimento_sustetantavel.pdf
http://bvsms.saude.gov.br/bvs/publicacoe...
.

To the vulnerability of motorcyclists' body exposure, the risk behavior adopted by them is added, which considerably increases the risks of injuries and deaths. The 2013 National Health Survey showed that, in the North, Northeast and Midwest regions, helmet use is less frequent than in other regions. Wearing a helmet reduces the risk of death by 40% and the risk of injury by 70%. Moreover, the North and Northeast regions have the lowest percentage of municipalities included in the National Transit System. As a consequence, they have lower surveillance capacity and investment in signaling and maintenance of road infrastructure3030. Malta DC, Andrade SSCA, Gomes N, Silva MMA, Morais Neto OL, Reis AAC, et al. Lesões no trânsito e uso de equipamento de proteção na população brasileira, segundo estudo de base populacional. Cienc Saude Coletiva. 2016;21(2):399-410. https://doi.org/10.1590/1413-81232015212.23742015
https://doi.org/10.1590/1413-81232015212...
.

The inequality between RTI mortality trends in capitals and non-capital municipalities of each state between 2000 and 2016 can be explained by the unequal increase in the fleet and the unequal capacity to implement regulatory measures in traffic. The ease of acquisition of motor vehicles, especially motorcycles, was favored by the tax benefits implemented by the federal government both with regard to their production and consumption2525. Scolari GAS, Derhun FM, Rossoni DF, Mathias TAF, Fernandes CAM, Carreira L. Tendência da mortalidade por acidentes de transporte terrestre em idosos no Brasil. Cogitare Enferm. 2017 [cited 2018 Sep 3];22(3):1-9. Available from: http://revistas.ufpr.br/cogitare/article/view/50170
http://revistas.ufpr.br/cogitare/article...
. In addition, public transport is inefficient or even inexistent in many municipalities, and urban mobility policies favor individual and private transport over public transport2626. Martins ET, Boing AF, Peres MA. Mortalidade por acidentes de motocicleta no Brasil: análise de tendência temporal, 1996-2009. Rev Saude Publica. 2013;47(5):931-41. https://doi.org/10.1590/S0034-8910.2013047004227
https://doi.org/10.1590/S0034-8910.20130...
. These factors, associated with economic growth, caused the motor vehicle fleet in Brazil to increase from 29,722,950 to 93,867,016 between 2000 and 2016. Motorcycles, which corresponded to 11.90% of the total national fleet at the beginning of this period, represented 22.31% in 2016, remaining 22.22% in 20182727. Diniz EPH, Pinheiro LC, Proietti FA. Quando e onde se acidentam e morrem os motociclistas em Belo Horizonte, Minas Gerais, Brasil. Cad Saude Publica. 2015;31(12):2621-34. https://doi.org/10.1590/0102-311X00112814
https://doi.org/10.1590/0102-311X0011281...
.

In recent decades, there has been an increasing strengthening of legislation related to the Prevention of risk factors for traffic deaths and injuries. The Brazilian Traffic Code was instituted in 1998, seeking to circumscribe the main Behavioral Risk Factors for RTI (speed, driving after drinking alcohol and not using the helmet, seat belt and device for transporting children)3131. Nogueira CM, Galvão PVM, Santos RACC, Fragoso BRTA, Laureano Filho JR, Souza EHA. Mortalidade por afogamento em crianças menores de 5 anos no Brasil: 2001 a 2010. Rev Baiana Saude Publica. 2016;40(3):616-32. https://doi.org/10.22278/2318-2660.2016.v40.n3.a1701
https://doi.org/10.22278/2318-2660.2016....
,3232. Abreu DROM, Souza EM, Mathias TAF. Impacto do Código de Trânsito Brasileiro e da Lei Seca na mortalidade por acidentes de trânsito. Cad Saude Publica. 2018;34(8):e00122117. https://doi.org/10.1590/0102-311x00122117
https://doi.org/10.1590/0102-311x0012211...
. However, its progressive implementation in the following years occurred unevenly among the capitals and non-capital municipalities, as well as among the macro-regions, according to their differential conditions for implementing and supervising the transit system3333. United Nations. Global Plan for the Decade of Action for Road Safety 2011-2020. Brasília, DF: Nações Unidas Brasil; 2016. Available from: https://www.who.int/roadsafety/decade_of_action/plan/en/
https://www.who.int/roadsafety/decade_of...
. Thus, its possible favorable effects for the reduction of RTI mortality also occurred unevenly and the results described here are compatible with this hypothesis3434. Hyder AA, Peden M. Inequality and road-traffic injuries: call for action. Lancet. 2003;362(9401):2034-5. https://doi.org/10.1016/S0140-6736(03)15145-8
https://doi.org/10.1016/S0140-6736(03)15...
.

The surveillance capacity of the SNT bodies, for example, is still insufficient in the three spheres of management of the country77. Silva MMA, Morais Neto OL, Lima CM, Malta DC, Silva Jr JB. Projeto Vida no Trânsito - 2010 a 2012: uma contribuição para a Década de Ações para a Segurança no Trânsito 2011-2020 no Brasil. Epidemiol Serv Saude. 2013;22(3):531-6. https://doi.org/10.5123/S1679-49742013000300019
https://doi.org/10.5123/S1679-4974201300...
. In the municipal sphere, only 28.22% of non-capital municipalities are part of the SNT. Meanwhile, 100% of the capitals adhered to the municipalization of traffic1111. Brasil. Lei N° 12.760, de 20 de dezembro de 2012. Altera a Lei N° 9.503, de 23 de setembro de 1997, que institui o Código de Trânsito Brasileiro. Brasília, DF; 2012 [cited 2018 Jul 27]. Available from: http://www.planalto.gov.br/ccivil_03/_Ato2011-2014/2012/Lei/L12760.htm
http://www.planalto.gov.br/ccivil_03/_At...
. The comparison between the mortality rates from RTI in the years 2000 and 2015 showed lower increase in the mortality rate among municipalities with traffic integrated to the SNT (percentage variation equal to 8.5%) compared to those with non-integrated traffic (29.1%)1313. Ministério da Saúde (BR), Secretaria de Vigilância em Saúde, Departamento de Vigilância de Doenças e Agravos Não Transmissíveis e Promoção da Saúde. Saúde Brasil 2017: uma análise da situação de saúde e os desafios para o alcance dos Objetivos de Desenvolvimento Sustentável. Brasília, DF; 2018 [citado 2018 Jul 27]. Available from: http://bvsms.saude.gov.br/bvs/publicacoes/saude_brasil_2017_analise_situacao_saude_desafios_objetivos_desenvolvimento_sustetantavel.pdf
http://bvsms.saude.gov.br/bvs/publicacoe...
.

In 2001, the National Policy for the reduction of morbidity and mortality due to accidents and violence was created (ordinance MS/GM No. 737 of May 16, 2001), establishing the need for interventions that promote the adoption of safe and healthy behaviors and environments. In 2004, the National Transit Policy was published (Resolution No. 166, of September 15, 2004), which included traffic in the global government plan and presented objectives, guidelines and targets for its improvement in Brazil. In 2010, The Life In Traffic project was created, coordinated by the Brazilian Ministry of Health. The project presupposed priority intervention in two risk factors for traffic accidents: excessive and inadequate speed and driving vehicles after drinking alcohol. The project became the Programa Vida no Trânsito (Life in Traffic Program), expanded in 201366. Morais Neto OL, Silva MMA, Lima CM, Malta DC, Silva Jr JB. Projeto Vida no Trânsito: avaliação das ações em cinco capitais brasileiras, 2011-2012. Epidemiol Serv Saude. 2013;22(3):373-82. http://doi.org/10.5123/S1679-49742013000300002
http://doi.org/10.5123/S1679-49742013000...
. Moreover, in 2011, the National Traffic Department implemented the National Pact for the Reduction of Traffic Accidents, with the participation of the Ministry of Health and the Ministry of Cities3535. Branco DKS, Carrillo Bermúdez B, Lima JE. Avaliação do efeito do pacto pela redução da mortalidade infantil no Nordeste e Amazônia Legal. Pesq Plan Econ. 2017 [citado 4 set 2018];47(2):63-86. Available from: http://ppe.ipea.gov.br/index.php/ppe/article/viewFile/1742/1245
http://ppe.ipea.gov.br/index.php/ppe/art...
. All these measures probably contributed to the decline of mortality indicators by RTI, especially in the richest regions of the country and in the Capitals, which have more resources and possibly managed to implement them more quickly and extensively in their territories3636. Fernandes CM, Boing AC. Mortalidade de pedestres em acidentes de trânsito no Brasil: análise de tendência temporal, 1996-2015. Epidemiol Serv Saude. 2019;28(1):e2018079. https://doi.org/10.5123/s1679-49742019000100021
https://doi.org/10.5123/s1679-4974201900...
. This could also explain the differences in mortality among means of transport, among capital and non-capital cities and among macro-regions. In the case of mortality of motorcycle occupants, the marked increase in the fleet overlapped with the aforementioned public policies3737. Seerig LM, Bacchieri G, Nascimento GG, Barros AJD, Demarco FF. Use of motorcycle in Brazil: users profile, prevalence of use and traffic accidents occurrence — a population-based study. Cienc Saude Coletiva. 2016;21(12):3703-10. https://doi.org/10.1590/1413-812320152112.28212015
https://doi.org/10.1590/1413-81232015211...
. Thus, mortality by this cause was increasing in most of the units analyzed.

The lack of information on the implementation differentials of the Brazilian Traffic Code among cities and among macro-regions is a limitation of our study. The fact that there are quality differences in the identification of the causes of death can also be considered a limitation of the study3838. Soares Filho AM, Cortez-Escalante JJ, França E. Revisão dos métodos de correção de óbitos e dimensões de qualidade da causa básica por acidentes e violências no Brasil. Cienc Saude Coletiva. 2016;21(12):3803-18. https://doi.org/10.1590/1413-812320152112.13682015
https://doi.org/10.1590/1413-81232015211...
. In the Mortality Information System, there is the possibility of underreporting the causes of death, especially in small municipalities and in the poorest macro-regions of the country, which may partially affect the results in an uncontrolled way.

The results of our article suggest that public accident prevention policies have not been as effective as market policies for increasing vehicle sales. Permanent monitoring of compliance with traffic legislation and investments in traffic engineering are fundamental actions to reverse this framework. Actions related to urban mobility should also be implemented through the improvement of the quality and frequency of public transport and the construction of adequate cycle crossings. These measures need to be implemented evenly in municipalities and regions to reduce the inequalities we observed.

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Publication Dates

  • Publication in this collection
    23 Nov 2020
  • Date of issue
    2020

History

  • Received
    30 Apr 2019
  • Accepted
    06 Mar 2020
Faculdade de Saúde Pública da Universidade de São Paulo São Paulo - SP - Brazil
E-mail: revsp@org.usp.br