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Revista de Saúde Pública

Print version ISSN 0034-8910

Rev. Saúde Pública vol.45 n.6 São Paulo Dec. 2011 Epub Oct 14, 2011

http://dx.doi.org/10.1590/S0034-89102011005000074 

ORIGINAL ARTICLE

 

Frequency and pattern of intimate partner violence before, during and after pregnancy

 

Frecuencia y patrón de la violencia por pareja íntima antes, durante y después del embarazo

 

 

Elisabete Pereira SilvaI; Ana Bernarda LudermirII; Thália Velho Barreto de AraújoII; Sandra Alves ValongueiroII

IPrograma de Pós-Graduação Integrado em Saúde Coletiva. Universidade Federal de Pernambuco (UFPE). Recife, PE, Brasil
IIDepartamento de Medicina Social. Centro de Ciências de Saúde. UFPE. Recife, PE, Brasil

Correspondence

 

 


ABSTRACT

OBJECTIVE: To estimate the prevalence and analyze the pattern of intimate partner violence, before and during pregnancy and in the postpartum period.
METHODS: This was a cohort study undertaken on 960 women aged 18 to 49 years, who were registered in the Family Health Program of the city of Recife, Northeastern Brazil, between 2005 and 2006. The women were interviewed during pregnancy and in the postpartum period, using a questionnaire adapted from the World Health Organization's Multi-country Study on Women's Health and Domestic Violence. To assess the pattern of intimate partner violence occurrences between a given time period and the subsequent period, the odds ratio (OR) was calculated with 95% confidence intervals (95%CI).
RESULTS: The prevalence of intimate partner violence before, during and/or after pregnancy was estimated to be 47.4%. For the three periods separately, it was 32.4%, 31.0% and 22.6% respectively. The women who reported violence before pregnancy were 11.6 times more likely to report violence during pregnancy (95%CI: 8.3;16.2). When the women reported violence during pregnancy, the chance of reports in the postpartum period was 8.2 times higher (95%CI: 5.1;11.7). Psychological violence was more prevalent, especially during pregnancy (28.8%; 95%CI: 26.0%;31.7%). Sexual violence was less prevalent, especially after delivery (3.7%; 95%CI: 2.6%;5.0%). Physical violence diminished by almost 50% during pregnancy, in comparison with the preceding period.
CONCLUSIONS: A significant proportion of women of reproductive age experience situations of intimate partner violence. The periods of prenatal and childcare consultations are opportunities for healthcare professionals to identify situations of violence.

Descriptors: Violence Against Women. Pregnant Women. Postpartum Period. Spouse Abuse. Cohort Studies.


RESUMEN

OBJETIVO: Estimar la prevalencia y analizar el patrón de violencia por pareja íntima, antes y durante la gestación y en el postparto.
MÉTODOS: Estudio de cohorte realizado con 960 mujeres de 18 a 49 años, catastradas en el Programa Salud de la Familia de la ciudad de Recife, Noreste de Brasil, entre 2005 y 2006. Las mujeres fueron entrevistadas durante la gestación y en el puerperio, utilizándose un cuestionario adaptado del Estudio Multipaíses sobre la Salud de la Mujer y Violencia Domestica de la Organización Mundial de la Salud. Para evaluar el patrón de ocurrencia de la violencia por pareja íntima, entre un determinado periodo y el subsecuente, el odds ratio (OR) fue calculado con intervalos de 95% de confianza (IC95%).
RESULTADOS: La prevalencia de violencia por pareja íntima antes, durante y/o después de la gestación fue estimada en 47,4% y para cada período aislado, en 32,4%, 31,0% y 22,6%, respectivamente. Las mujeres que relataron violencia antes del embarazo tuvieron chance 11,6 veces mayor (IC95%:8,3;6,2) de relatar violencia durante el embarazo. Cuando las mujeres relataron violencia durante el embarazo, el chance de relatos en el postparto fue 8,2 veces mayor (IC95%:5,1;11,7). La violencia psicológica fue la de mayor prevalencia, principalmente durante la gestación (28,8%; IC95%:26,0%;31,7%); la sexual, la menos prevalente, especialmente en el postparto (3,7%; IC95%: 2,6%;5,0%); y la física disminuyó casi 50% durante la gestación en comparación con el período anterior.
CONCLUSIONES: Parcela significativa de as mujeres en edad reproductiva experimenta situaciones de violencia por pareja íntima. Los períodos de consultas de prenatal y de puericultura son oportunidades para que el profesional de salud pueda identificar situaciones de violencia.

Descriptores: Violencia contra la Mujer. Mujeres Embarazadas. Periodo de Posparto. Maltrato Conyugal. Estudios de Cohortes.


 

 

INTRODUCTION

Intimate partner violence (IPV) during pregnancy and the postpartum period is considered by many authors3,6,8,12,17 to be a serious public health problem and a complex phenomenon that may have very negative consequences for the health of the mother, fetus and child. In such cases, the violence is not just directed against the woman: there is also involvement of an unborn or newborn child, or one that is within its first year of life and growing up in a situation of violence.

The prevalences of some types of IPV over the 12 months preceding pregnancy have been reported to be 10.6% in England2 and 24.4% in Mexico,5 becoming 3.0% and 31.1%8 respectively, during pregnancy. In Brazil, the prevalences have been estimated as 24.7% in Recife, state of Pernambuco (northeastern), and 32.0% in the city of São Paulo (southeastern), before pregnancy, and as 30.6% and 31.8%, respectively, during pregnancy.ª In the postpartum period, the prevalences found have ranged from 8.3%, in China,12 to 24.2%, in Sweden.13 In Brazil, until the present study was concluded, there were no papers on the prevalence and incidence of IPV, comparing the periods before and during pregnancy with the postpartum period.

Physical violence has been most studied, and its prevalence over the 12 months preceding pregnancy has been found to range from 3.0% to 13.1%;17,21 during pregnancy from 1.0% to 7.4%;3,21 and after delivery from 1.2% to 19.7%.11,17 Sexual violence has been least evaluated, with lowest frequency of occurrence: prevalence before pregnancy from 1.5% to 6.8%;12,17 during pregnancy from 1.3% to 4.0%;17,ª and during the postpartum period from 0.9% to 4.9%.12,17 Psychological violence during the period preceding pregnancy has been found to range from 1.9% to 26.6%;12,ª during pregnancy from 1.5% to 29.4%;12,ª and after pregnancy from 2.5% to 18.0%.12,17

These different results should be interpreted carefully, because they are influenced by differences in the methodology, data-gathering instrument, sample composition and time when the interview was held, which impairs comparability, especially regarding the types of violence studied. Among the studies cited, only Guo et al12 and Hedin13 evaluated all three types of violence during the three periods, as done in the present study.

Studies conducted both in Brazil and in other countries1,5,9,11,23 have shown the high magnitude of IPV. Furthermore, episodes of violence may be severe and recurrent, thus indicating that they may present a continuous pattern.

Increased levels of arguments within couples caused by stress and changes in life due to pregnancy were reported by Martin et al20 (2004) to be situations that could trigger violence during pregnancy and the postpartum period. According to Burch & Gallup Jr.4 (2004), if pregnancy is linked with an atmosphere of jealousy and mistrust regarding paternity, violence may then start to be experienced, with the likelihood that this will continue into the postpartum period. According to Jasinski14 (2004), during the postpartum period, with a newly born child, the sleepless nights and changes in family dynamics may provoke greater conflicts within couples, including arguments about sexual activity, which may lead to sexual violence during this period. In addition to these factors, Stewart25 (1994) cited the increased financial responsibility, the woman's physical and hormonal changes and the adjustments to the roles of father and mother, relationships between the couple and interactions with relatives. Other authors have also shown that IPV before pregnancy is a risk factor for violence during pregnancy and during the postpartum period, just as violence during pregnancy is a risk factor for violence during the postpartum period.12,13,19,25

The aim of the present study was to estimate the prevalence and analyze the pattern of physical, psychological and sexual violence perpetrated by an intimate partner, before and during pregnancy and in the postpartum period.

 

METHODS

This prospective cohort study was conducted within the scope of the project "Violence during pregnancy: determinants and consequences for reproductive health, mental health and perinatal results", in Health District II of the city of Recife, Pernambuco.

All the pregnant women (n = 1,133) aged 18 to 49 years who were registered within the Family Health Program of this district were considered eligible. Out of these 1133 eligible women, 12 did not answer the questionnaire, of whom five lived on the streets, three had moved away from the study area and four could not be located by the interviewers even after making several visits. After taking account of the losses, 1,121 women (98.9%) were interviewed and, of these, 1,057 were reinterviewed during the postpartum period. For the present study, the sample was composed of 960 women who were interviewed no more than 12 months after delivery, in order to ensure comparability with the published literature. The losses that occurred between pregnancy and the postpartum period (64) consisted of two women who were not in a position to undergo the second interview, three deaths, 37 women who could not be located because of changes of address, four who had started to live on the streets and 13 who had moved into areas controlled by drug traffickers; only five women actually refused to participate. The interviewers selected had university-level education and experience of dealing with the topic "violence against women", and were duly trained for this task. The difficulties encountered during the interviews were discussed with the interviewers once a week.

The data were gathered by means of applying a questionnaire in face-to-face interviews that were conducted between July 2005 and December 2006.

The first contact with the pregnant women was made during a prenatal consultation. The interviews were conducted at the Family Health Unit itself, in the researchers' car or at a time and place that were more convenient for the woman, with the aim of ensuring their comfort and safety. The contacts with the pregnant women who were not undergoing prenatal consultations at the Family Health Unit and with those who were not having prenatal consultations on a regular basis were made at their homes. This latter group of pregnant women was identified from the Community Health Agents' records.

During the postpartum period, the women were contacted at childcare consultations or at home, following the same standards as stipulated for the interviews during pregnancy. The majority of the interviews were conducted at the women's homes.

Two questionnaires were applied: one during pregnancy and the other during the postpartum period. The questions relating to IPV were drawn up with reference to the questionnaire of the World Health Organization's Multi-country Study on Women's Health and Domestic Violence, which has already been validated in Brazil.10,15,24

The questionnaire applied covered social, demographic, economic and cultural characteristics and the reproductive health situation. Questions on the woman's relationship with her partner and her experiences of violence were placed at the end, i.e., the situations of greater sensitivity were introduced gradually so that the woman would gain confidence to speak.

The intimate partner was defined as the partner or former partner with whom the woman was living or had lived, independent of whether the relationship was a formal union or a situation of cohabitation.

To identify violence,15,16,23 the questions characterized physical violence as physical aggression or use of objects or weapons to produce injuries; psychological violence as threatening behavior, humiliation and insults; and sexual violence as sexual intercourse imposed by means of physical force or threats and imposition of acts that were considered humiliating. A more detailed description of the questions has already been published. Women who answered "yes" to at least one of the questions that made up each type of violence were considered to be positive cases. Each report of violence was explored regarding occurrences before and during pregnancy and in the postpartum period.

The analysis was done using the Stata software, version 8.0. The frequencies of the different types of violence (psychological, physical and sexual) were estimated separately and with their overlaps, for the periods of before, during and after pregnancy. To test differences between the proportions, the chi-square (χ2) test was used. Proportions with p < 0.05 were considered statistically significant. To assess the pattern of occurrence of IPV, between one period and the subsequent period, the odds ratio (OR) and its 95% confidence interval (95%CI) was calculated.

To ascertain the prevalence of IPV, all cases of psychological, physical and sexual violence were taken into consideration, both separately and with overlaps, inflicted by the current or most recent partner and occurring before or during pregnancy or after delivery.

The incidence of IPV during pregnancy and in the postpartum period was taken to be all cases of violence that started during the respective periods.

All the interviews were conducted without the partner or any other person aged greater than or equal to two years. If, during the interview, anyone that the woman knew came into the interview area, the questionnaire on violence was automatically replaced by another relating to women's health.

The women who were interviewed received information on the services providing assistance to women who are victims of violence that are available in the city of Recife.

The research was approved by the Ethics Committee of the Universidade Federal de Pernambuco (protocol number 303/2004).

 

RESULTS

The present study achieved a high response rate, such that 1057 women concluded the postpartum interview. This represented 94.3% of the 1,121 women who were interviewed during pregnancy, with a small percentage of losses. The 64 women interviewed during pregnancy who were not reinterviewed during the postpartum period had lower schooling levels (p = 0.001) but did not show any statistically significant differences in relation to the other socioeconomic and demographic variables, or in relation to the frequency of violence during pregnancy. The 960 women studied represented 90.8% of the 1,057 women reinterviewed during the postpartum period.

Women aged 20 years or over, nonwhites (80.4%) and women with less than nine years of schooling (63.1%) predominated, and 83.7% declared that they had an intimate partner at the time of the interview. More than 60% of the interviewees were housewives; 59.4% of the women said that they had some type of income; and 34.0% were not homeowners (Table 1).

 

 

Figure 1 shows the prevalences and incidences of IPV found in this study. Among the women studied, 455 (47.4%; 95%CI: 44.3%; 50.6%) reported that some type of violence (psychological, physical or sexual) had occurred at some time (before, during or after pregnancy). Violence before pregnancy was reported by 311 women (32.4%; 95%CI: 29.5%; 35.4%); during pregnancy, by 298 women (31.1%; 95%CI: 28.2%; 34.0%); and during the postpartum period, by 217 women (22.6%; 95%CI: 20.0%; 25.3%). The prevalence of IPV during the postpartum period was less than the prevalence before the pregnancy (p = 0.01) and during the pregnancy (p = 0.03). The incidence of IPV during pregnancy was 9.7% (95%CI: 7.9%; 11.8%) and during the postpartum period, it was 5.3% (95%CI: 4.0%; 6.9%).

The percentages presented in Figure 2 were calculated taking the reference point of the numbers of women "with" and "without" violence during the preceding period. They show that if IPV had already been suffered, the chance of violence during the subsequent period became greater. The women who reported suffering violence before pregnancy had a 11.6 times greater chance (205 x 556 / 93 x 106) of violence during pregnancy (95%CI: 8.3; 16.2). The frequency of violence during the postpartum period was 8.2 times greater (147 x 591 / 70 x 151) for the women who reported violence during pregnancy (95%CI: 5.80; 11.69) and 7.23 times greater (111 x 649 / 106 x 94) for those who reported it both before and during pregnancy (95%CI: 5.06; 10.34). Among the women who reported suffering IPV before, but that the violence ceased during pregnancy, the chance that they would again suffer violence during the postpartum period was 4.6 times greater (130 x 562 / 87 x 181) than among those had not reported violence before pregnancy (95%CI: 3.33; 6.47).

Among the women "with" reports of violence before pregnancy, 66% continued to suffer this during pregnancy; among the remainder, IPV during pregnancy was reported by 14% (p < 0.001). Among those who reported violence before and during pregnancy, 54% presented reports during the postpartum period. The proportion was 9.2% among those who had not suffered IPV during pregnancy or before this (p < 0.001), as shown in Figure 2.

Psychological violence was the type of highest prevalence at all the times evaluated (Table 2), especially during pregnancy (28.8%; 95%CI: 26.0%; 31.7%). Sexual violence had the lowest prevalence, especially during the postpartum period (3.7%; 95%CI: 2.6%; 5.0%), but among these cases, 57.2% occurred during the puerperium. Physical violence diminished by almost 50% during pregnancy, in comparison with the period preceding pregnancy.

The frequency and overlapping of types of violence (Figure 3) showed that psychological violence alone was the most frequent type in all the periods. During pregnancy, the number of cases increased from 95 (30.6%) to 166 (55.7%), but when it overlapped with physical violence, it decreased from 109 (35.0%) to 65 (21.8%), in comparison with the preceding period (p < 0.001). Although physical violence alone decreased from 16.7% before pregnancy to 4.4% during pregnancy, this reduction was not statistically significant (p = 0.66). Sexual violence alone remained at around 3.0% in all three periods. Psychological, physical and sexual violence occurred simultaneously in 10% of the cases.

 

 

DISCUSSION

The present study was the first known Brazilian cohort to estimate the prevalence and incidence of violence against women perpetrated by an intimate partner and assess the occurrences of psychological, physical and sexual violence before and during pregnancy and in the postpartum period.

Because the women were interviewed on two occasions (during pregnancy and in the postpartum period), this made it possible to identify changes in the types and magnitude of IPV. The large sample and the small percentage of losses (5.7%) ensured that the results were representative. Furthermore, the data were gathered by means of a questionnaire that had been validated previously10,15,24 and which measured violence according to concrete acts, which increases the trustworthiness of the results.

However, IPV is a complex, delicate and intimate topic. Thus, the woman's psychological resources for facing up to the trauma suffered and her difficulties and blockages in recalling this painful experience may interfere with her ability to speak about it, which may contribute towards underestimating the prevalence of IPV. In addition to these factors that are intrinsic to the woman, others may cause underestimation of the violence, such as: a relationship lacking in empathy between the interviewer and interviewee; the location for the interview; the woman's insecurity regarding the confidentiality of her report;2 the current relationship with the partner causing the aggression; a feeling of fear in relation to the partner causing the aggression; and the protection that the woman gives to the partner because of her desire to maintain the relationship,4 especially if this partner is the father of the child. Furthermore, among many other factors, there is the stigma and shame of having suffered the aggression.15

In Brazil, the social and institutional responses to the demands made by women's movements have favored publication of more reports, which has given greater visibility to IPV.23 However, it is possible that underestimation of cases revealed by women and cases notified by institutions and healthcare professionals still persists.2,21 Therefore, the high prevalence of IPV of any type (47.4%) found in the three periods studied may still be an underestimate. This prevalence was much greater than what was cited by Guo et al12 (12.6%), in China, in an analysis on the same types of violence and the same periods, and the prevalence found by Durand et al9 (20%) during pregnancy, among users of public services in the city of São Paulo. Among many other factors, the prevalences depend on the socioeconomic conditions of the women and their partners, personal concepts and sociocultural contexts, in which the gender hierarchy is legitimated to a greater or lesser extent, which contributes towards increasing or decreasing the reports of violence.1,3,6,10,19,21,23

Like in the studies by Castro et al5 in Mexico and Schraiber et alª in Brazil, there was no change in the prevalence of IPV in the comparison between the periods before and during pregnancy. However, during pregnancy, the physical violence diminished and the psychological violence increased, and that pattern was also found in the present study and by other authors.5,20,ª The data in these cited studies show that pregnancy does not protect the woman from violent situations, but the type of violence becomes modified. Although psychological violence does not leave visible signs like physical violence does, its severity and its consequences for the woman cannot be neglected, both during pregnancy and during the puerperium.16

There is a discussion in the literature as to whether pregnancy is a protection or a risk factor for IPV. Some studies, like the present study, have shown that there is a decrease in IPV, especially regarding physical violence;21 others have shown that the percentages remain unaltered;19 others have shown that IPV appears or increases;4 and yet others have shown that the incidence of IPV was low, affecting around 1% of the cases.12 The findings from the present study contribute towards this discussion, through showing a pattern of continuity, with a very high chance of reports of violence during pregnancy continuing from before pregnancy. Thus, since the incidence of IPV during pregnancy was almost 10%, this shows that the pregnancy period did not provide protection for the woman.

The reduction in prevalence in the postpartum period is consistent with the findings of some other studies.19 Like the present study, these studies showed that there was a higher percentage of cessation of violence during the postpartum period that of its maintenance. On the other hand, despite the lower prevalence in the postpartum period, the women who reported violence during pregnancy always had higher frequency in the postpartum period than did the women without such reports during pregnancy. These results indicate that a pattern of recurrence and continuity existed. Other studies that revealed increased levels of IPV in the postpartum period, in comparison with the period before and/or during pregnancy,3,6,11 presented high rates of maintenance of IPV.

In the present study, like in others,12,23 the types of violence very often occurred in an overlapping manner, especially between physical and sexual violence.

The prevalence of psychological violence in the three periods was almost twice as large (42.0%) as physical violence (28.6%) and four times greater than sexual violence (9.8%). This higher percentage of psychological violence is consistent with some studies,3,6,17 but is discordant with a study conducted in China,12 which found that sexual violence was more prevalent than psychological violence in all three periods, and that there was higher prevalence of physical violence than of psychological violence, both before pregnancy and after delivery. The low percentages of psychological violence reported in some studies may have been due to cultural influences and structured gender inequality relationships, which make it difficult for women to recognize situations that are considered to consist of psychological aggression. According to Charles & Perreira,6 the high percentage of psychological violence during the postpartum period may result from high levels of stress and discord, with are associated with the significant changes to the woman's life and to the couple, consequent to the birth of a child.

The percentage of sexual violence remained practically the same before and during pregnancy, but it decreased in the postpartum period. It is important to highlight that almost 60% of these cases occurred during the first 40 days of the puerperium. In North Carolina, Macy et al17 also found a higher percentage of sexual violence over the first month of the postpartum period. According to Jasinski,14 this was due, among other reasons, to the woman's lower interest in sexual activity during the immediate postpartum period, possibly because of the special hormonal state of the puerperium. During this phase, the woman presents high levels of prolactin, a hormone that is fundamental for breastfeeding and which diminished libido.18 Moreover, studies have shown that there may be physical problems during the puerperium, going from fatigue to pains in various parts of the body.22 Women also face problems of psychosocial adaptation to maternity and difficulties due to lack of support and understanding of the dynamics of the puerperium, especially on the part of the partner.7,18

Healthcare professionals need to be alert to women who suffer IPV before pregnancy, since these women's chance of suffering violence during pregnancy is almost 12 times greater. This has also been found in other studies.12,19

The role of healthcare professionals in identifying violence against women is still a question under debate. Some authors have advocated routine investigation, but have mentioned the need for an institutionalized support network, formed by healthcare services and social and legal assistance.17,19 The period during which the woman is attending prenatal consultations and the first year after delivery (when she takes the child for childcare consultations) enable longer contact with healthcare professionals, which increases the chance of identifying situations of violence. Primary care is of fundamental importance, given that following up low-risk pregnancies and childcare are priorities of the Family Health Program.

In conclusion, this study shows the high magnitude and continuity of IPV among women of reproductive age, especially during the period around pregnancy and in the postpartum period. Thus, public policies for prevention of different types of violence are essential, along with treatment for its consequences, with support for women seeking protection for themselves and for their children.

 

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Correspondence:
Elisabete Pereira Silva
R. Baltazar Passos, 611 - Aptº 1.206
Boa Viagem
51130-290 Recife, PE, Brasil
E-mail: elisabetepsilva@terra.com.br

Received: 11/12/2010
Approved: 7/4/2011
The research project "Violence during pregnancy: determinants and consequences for reproductive health, mental health and perinatal results", was funded by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq - procedural number 403060/2004-4) and by the Departamento de Ciência e Tecnologia da Secretaria de Ciência, Tecnologia e Insumos Estratégicos do Ministério da Saúde (Decit - procedural number 473545/2004-7).

 

 

Article based on the master's dissertation of Silva EP presented to the Universidade Federal de Pernambuco in 2009.
a Schraiber LB, D'Oliveira AFPL, Kiss LB, Durand J, Hanada H, Silva VN et al. Saúde da mulher, relações familiares e serviços de saúde do Sistema Único de Saúde (SUS) em duas capitais - Recife e São Paulo. São Paulo: Faculdade de Medicina da Universidade de São Paulo; 2007. Projeto CNPq: Linha de pesquisa Violência, Acidentes e Trauma, nº 506705/2004-8. Caderno de primeiros resultados extraídos do Relatório Final da Pesquisa do CNPq.