<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0102-311X</journal-id>
<journal-title><![CDATA[Cadernos de Saúde Pública]]></journal-title>
<abbrev-journal-title><![CDATA[Cad. Saúde Pública]]></abbrev-journal-title>
<issn>0102-311X</issn>
<publisher>
<publisher-name><![CDATA[Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0102-311X2012001100008</article-id>
<article-id pub-id-type="doi">10.1590/S0102-311X2012001100008</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Nível de hemoglobina entre idosos e sua associação com indicadores do estado nutricional e uso de serviços de saúde: Projeto Bambuí]]></article-title>
<article-title xml:lang="en"><![CDATA[Hemoglobin level in older adults and the association with nutritional status and use of health services: the Bambuí Project]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Clarice Lima Álvares da]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lima-Costa]]></surname>
<given-names><![CDATA[Maria Fernanda]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Firmo]]></surname>
<given-names><![CDATA[Josélia Oliveira Araújo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peixoto]]></surname>
<given-names><![CDATA[Sérgio Viana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidade Federal de Minas Gerais  ]]></institution>
<addr-line><![CDATA[Belo Horizonte ]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2012</year>
</pub-date>
<volume>28</volume>
<numero>11</numero>
<fpage>2085</fpage>
<lpage>2094</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielosp.org/scielo.php?script=sci_arttext&amp;pid=S0102-311X2012001100008&amp;lng=en&amp;nrm=iso&amp;tlng=en"></self-uri><self-uri xlink:href="http://www.scielosp.org/scielo.php?script=sci_abstract&amp;pid=S0102-311X2012001100008&amp;lng=en&amp;nrm=iso&amp;tlng=en"></self-uri><self-uri xlink:href="http://www.scielosp.org/scielo.php?script=sci_pdf&amp;pid=S0102-311X2012001100008&amp;lng=en&amp;nrm=iso&amp;tlng=en"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[O objetivo deste estudo foi descrever a prevalência de anemia e avaliar a associação de nível de hemoglobina (Hb) com indicadores do estado nutricional e uso de serviços de saúde em uma população idosa (&#8805; 60 anos). Dos 1.742 idosos participantes da linha de base da coorte de Bambuí, Minas Gerais, Brasil, foram incluídos 1.441 (82,7%). A variável dependente foi o nível de Hb e as independentes foram número de hospitalizações e visitas ao médico nos 12 meses precedentes à entrevista, índice de massa corporal (IMC) e albumina sérica. Foi realizada regressão linear multivariada estratificada por sexo e ajustada por fatores de confusão. A prevalência de anemia foi baixa na população (4,5%), sem diferenças entre sexos e significativamente maior em idosos mais velhos (10,2%). Baixos níveis de Hb foram associados ao maior número de consultas médicas e a menores valores de albumina sérica e IMC em ambos os sexos. O estudo sugere um ciclo complexo entre baixos níveis de Hb, desnutrição e atendimento médico, o que deve ser considerado na estruturação de programas de saúde para idosos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This study aimed to describe the prevalence of anemia and to evaluate the association between hemoglobin (Hb) level and indicators of nutritional status and health services utilization in an elderly population (&#8805; 60 years). Of the 1,742 older adults in the baseline of the Bambuí cohort, 1,441 (82.7%) were included. The dependent variable was Hb level, and the independent variables were number of hospitalizations and physician visits in the previous 12 months, body mass index (BMI), and serum albumin. Multivariate linear regression was performed, stratified by gender and adjusted for confounding factors. Prevalence of anemia was low (4.5%), with no difference by gender, and higher in the oldest old (10.2%). Low Hb level was associated with more physician visits and lower serum albumin and BMI in both men and women, suggesting a complex cycle between low Hb level, malnutrition, and medical care that should be considered when structuring health programs for the elderly.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Envelhecimento]]></kwd>
<kwd lng="pt"><![CDATA[Hemoglobinas]]></kwd>
<kwd lng="pt"><![CDATA[Anemia]]></kwd>
<kwd lng="pt"><![CDATA[Estado Nutricional]]></kwd>
<kwd lng="pt"><![CDATA[Serviços de Saúde]]></kwd>
<kwd lng="en"><![CDATA[Aging]]></kwd>
<kwd lng="en"><![CDATA[Hemoglobins]]></kwd>
<kwd lng="en"><![CDATA[Anemia]]></kwd>
<kwd lng="en"><![CDATA[Nutritional Status]]></kwd>
<kwd lng="en"><![CDATA[Health Services]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ARTIGO</b> ARTICLE</font></p>     <p>&nbsp;</p>     <p><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>N&iacute;vel de   hemoglobina entre idosos e sua associa&ccedil;&atilde;o com indicadores do estado nutricional   e uso de servi&ccedil;os de sa&uacute;de:     Projeto Bambu&iacute;</b></font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Hemoglobin level in older adults   and the association with   nutritional status and use of health services: the Bambu&iacute; Project</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Clarice Lima   &Aacute;lvares da Silva<sup>I,II</sup>; Maria   Fernanda Lima-Costa<sup>I</sup>; Jos&eacute;lia   Oliveira Ara&uacute;jo Firmo<sup>I</sup>; S&eacute;rgio Viana   Peixoto<sup>I,III</sup></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><sup>I</sup>N&uacute;cleo de Estudos em Sa&uacute;de P&uacute;blica e Envelhecimento,   Funda&ccedil;&atilde;o Oswaldo Cruz/Universidade Federal de Minas Gerais, Belo Horizonte,   Brasil<br />   <sup>II</sup>Centro de Pesquisas Ren&eacute; Rachou, Funda&ccedil;&atilde;o Oswaldo Cruz,   Belo Horizonte, Brasil<br />   <sup>III</sup>Escola de Enfermagem, Universidade Federal de Minas   Gerais, Belo Horizonte, Brasil</font></p>     <p><font size="2" face="verdana"><a href="#end">Correspond&ecirc;ncia</a></font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p>&nbsp;</p> <hr size="1" noshade>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>RESUMO</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">O objetivo deste estudo foi descrever a preval&ecirc;ncia de   anemia e avaliar a associa&ccedil;&atilde;o de n&iacute;vel de hemoglobina (Hb) com indicadores do   estado nutricional e uso de servi&ccedil;os de sa&uacute;de em uma popula&ccedil;&atilde;o idosa (&#8805;   60 anos). Dos 1.742 idosos participantes da linha de base da coorte de Bambu&iacute;,   Minas Gerais, Brasil, foram inclu&iacute;dos 1.441 (82,7%). A vari&aacute;vel dependente foi   o n&iacute;vel de Hb e as independentes foram n&uacute;mero de hospitaliza&ccedil;&otilde;es e visitas ao   m&eacute;dico nos 12 meses precedentes &agrave; entrevista, &iacute;ndice de massa corporal (IMC) e   albumina s&eacute;rica. Foi realizada regress&atilde;o linear multivariada estratificada por   sexo e ajustada por fatores de confus&atilde;o. A preval&ecirc;ncia de anemia foi baixa na   popula&ccedil;&atilde;o (4,5%), sem diferen&ccedil;as entre sexos e significativamente maior em   idosos mais velhos (10,2%). Baixos n&iacute;veis de Hb foram associados ao maior   n&uacute;mero de consultas m&eacute;dicas e a menores valores de albumina s&eacute;rica e IMC em   ambos os sexos. O estudo sugere um ciclo complexo entre baixos n&iacute;veis de Hb,   desnutri&ccedil;&atilde;o e atendimento m&eacute;dico, o que deve ser considerado na estrutura&ccedil;&atilde;o de   programas de sa&uacute;de para idosos.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Envelhecimento; Hemoglobinas; Anemia; Estado Nutricional;   Servi&ccedil;os de Sa&uacute;de</font></p> <hr size="1" noshade>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ABSTRACT</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">This study   aimed to describe the prevalence of anemia and to evaluate the association   between hemoglobin (Hb) level and indicators of nutritional status and health   services utilization in an elderly population (&#8805; 60 years). Of the 1,742   older adults in the baseline of the Bambu&iacute; cohort, 1,441 (82.7%) were included.   The dependent variable was Hb level, and the independent variables were number   of hospitalizations and physician visits in the previous 12 months, body mass   index (BMI), and serum albumin. Multivariate linear regression was performed,   stratified by gender and adjusted for confounding factors. Prevalence of anemia   was low (4.5%), with no difference by gender, and higher in the oldest old   (10.2%). Low Hb level was associated with more physician visits and lower serum   albumin and BMI in both men and women, suggesting a complex cycle between low   Hb level, malnutrition, and medical care that should be considered when   structuring health programs for the elderly.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Aging;   Hemoglobins; Anemia; Nutritional Status; Health Services</font></p> <hr size="1" noshade>     <p>&nbsp;</p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Introdu&ccedil;&atilde;o</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Os n&iacute;veis de hemoglobina (Hb) tendem a diminuir   com o aumento da idade, pois a modula&ccedil;&atilde;o hematopoi&eacute;tica se torna desbalanceada   em decorr&ecirc;ncia da menor habilidade da medula &oacute;ssea para responder a est&iacute;mulos   adversos, tais como sangramentos, infec&ccedil;&otilde;es e danos citot&oacute;xicos<sup>1,2</sup>.   A anemia &eacute;, ent&atilde;o, considerada um problema de sa&uacute;de nessa popula&ccedil;&atilde;o<sup>3,4</sup>,   sendo elevada a sua preval&ecirc;ncia ap&oacute;s os 60 anos e ainda maior entre aqueles com   80 anos ou mais<sup>5,6,7,8</sup>. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Baixos n&iacute;veis de Hb, mesmo entre idosos n&atilde;o   an&ecirc;micos, t&ecirc;m sido relacionados a d&eacute;ficits de concentra&ccedil;&atilde;o e for&ccedil;a muscular,   baixo desempenho f&iacute;sico, depend&ecirc;ncia funcional e aumento da mortalidade por   outras doen&ccedil;as<sup>3,9,10,11</sup>. Embora n&atilde;o seja bem estabelecida a rela&ccedil;&atilde;o   de causalidade, tem sido postulado que tal condi&ccedil;&atilde;o atua negativamente na sa&uacute;de   geral do idoso, agravando problemas preexistentes e levando ao surgimento de   novas complica&ccedil;&otilde;es<sup>4</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Pesquisas de base populacional entre idosos para   determinar a preval&ecirc;ncia de anemia e os fatores associados ao n&iacute;vel de Hb s&atilde;o   escassas<sup>12</sup>,     sobretudo no Brasil. Os estudos nacionais incluem dois, desenvolvidos nos   estados de Minas Gerais<sup>13 </sup>e Pernambuco<sup>14</sup>, com amostras   de idosos cadastrados no Programa Sa&uacute;de da Fam&iacute;lia (PSF); outro, da Regi&atilde;o Sul   do pa&iacute;s<sup>1</sup>, com amostra n&atilde;o probabil&iacute;stica de idosos saud&aacute;veis   participantes de grupos sociais; e apenas um de base populacional, desenvolvido   em S&atilde;o Paulo<sup>15</sup>.     Apesar da escassez, os resultados dessas investiga&ccedil;&otilde;es podem ser considerados   pioneiros no levantamento da anemia verificada na popula&ccedil;&atilde;o idosa brasileira,   com preval&ecirc;ncias dessa condi&ccedil;&atilde;o variando entre 4% e 12% nas popula&ccedil;&otilde;es   estudadas.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A associa&ccedil;&atilde;o entre baixos n&iacute;veis de Hb e maior   procura por servi&ccedil;os de sa&uacute;de j&aacute; foi bem estabelecida entre idosos usu&aacute;rios de   sistemas de sa&uacute;de p&uacute;blicos e privados americanos, mostrando impacto importante   sobre seus custos<sup>16</sup>. Por outro lado, a sua associa&ccedil;&atilde;o com   desnutri&ccedil;&atilde;o proteico-cal&oacute;rica n&atilde;o tem sido muito explorada na literatura<sup>17,18</sup>,   especialmente entre idosos residentes em comunidade. Entre idosos   hospitalizados, a anemia &eacute; fortemente associada a menores valores de &iacute;ndice de   massa corporal e albumina s&eacute;rica<sup>8,18,19,20</sup>. Portanto, parece haver   forte rela&ccedil;&atilde;o entre n&iacute;veis de Hb, estado nutricional e uso de servi&ccedil;os de sa&uacute;de   em idosos, que deve ser mais bem explorada em estudos de base populacional, de   forma a possibilitar uma adequada avalia&ccedil;&atilde;o e elabora&ccedil;&atilde;o de estrat&eacute;gias   voltadas &agrave; sa&uacute;de deste grupo. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">No presente trabalho, foram utilizados dados da   linha de base da coorte de Bambu&iacute;<sup>21</sup>, Minas Gerais, Brasil, para   descrever a preval&ecirc;ncia de anemia e verificar a associa&ccedil;&atilde;o de n&iacute;vel de Hb com   indicadores do estado nutricional e uso de servi&ccedil;os de sa&uacute;de nessa popula&ccedil;&atilde;o.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Material e m&eacute;todos</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><u>Coorte de idosos de Bambu&iacute;</u></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A coorte de   idosos de Bambu&iacute; foi conduzida no Munic&iacute;pio de Bambu&iacute;, o qual conta com   aproximadamente 15 mil habitantes, estando situado no Estado de Minas Gerais.   Os participantes da linha de base foram identificados por meio de um censo   completo realizado na cidade em 1996. Todos os 1.742 residentes na &aacute;rea urbana   com 60 anos ou mais de idade, em 1º de janeiro de 1997, foram   eleg&iacute;veis para o estudo de coorte. Destes, 1.496 (85,9%) realizaram medidas   antropom&eacute;tricas e exames hematol&oacute;gicos, dos quais 55 foram exclu&iacute;dos da an&aacute;lise   porque estavam em uso de suplementos nutricionais de ferro, vitamina B<sub>12</sub> e/ou &aacute;cido f&oacute;lico. Dessa forma, 1.441 (82,7%) idosos foram selecionados para o   presente trabalho. O delineamento da coorte e os procedimentos adotados foram   descritos em publica&ccedil;&atilde;o anterior<sup>21</sup>.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A coorte de Bambu&iacute; foi aprovada pelo Comit&ecirc; de &Eacute;tica   da Funda&ccedil;&atilde;o Oswaldo Cruz, Rio de Janeiro, e todos os participantes assinaram um   termo de consentimento livre e esclarecido.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><u>Coleta de dados</u></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">As informa&ccedil;&otilde;es para este trabalho foram obtidas   por meio do question&aacute;rio BHAS (<i>Bambu&iacute;     Health and Aging Study</i>). As entrevistas foram realizadas na   resid&ecirc;ncia do participante e respondidas pelo idoso, exceto quando este estava   impossibilitado em decorr&ecirc;ncia de d&eacute;ficit cognitivo ou de algum problema de   sa&uacute;de; neste caso, utilizou-se um respondente pr&oacute;ximo.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A avalia&ccedil;&atilde;o antropom&eacute;trica (peso e altura) e a   coleta de amostras de sangue para an&aacute;lises bioqu&iacute;micas foram realizadas na   cl&iacute;nica de campo do projeto (Posto Emanuel Dias). A avalia&ccedil;&atilde;o antropom&eacute;trica,   feita por t&eacute;cnicos certificados ap&oacute;s treinamento, empregou t&eacute;cnicas e equipamentos   padr&otilde;es (CMS Weighing Equipment Ltd., Londres, Reino Unido), estando os   participantes vestidos com roupas leves e sem sapatos. Para a coleta de sangue,   os participantes foram orientados a realizar jejum m&iacute;nimo de 12 horas. Na   impossibilidade de o volunt&aacute;rio se locomover at&eacute; o posto, a coleta foi feita em   seu domic&iacute;lio. A dosagem do n&iacute;vel de Hb foi realizada mediante contador   eletr&ocirc;nico (Coulter Counter T-890, Estados Unidos), e os n&iacute;veis s&eacute;ricos de   albumina e creatinina foram determinados por m&eacute;todos enzim&aacute;ticos padronizados,   usando-se equipamento autom&aacute;tico (Eclipse Vitalab; Merck, Holanda).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><u>Vari&aacute;veis do estudo</u></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">O   n&iacute;vel de Hb (g/dL) foi considerado como vari&aacute;vel cont&iacute;nua, sendo a anemia   caracterizada por valores abaixo de 13g/dL, para o sexo masculino,   e 12g/dL, para feminino<sup>22</sup>. Idosos an&ecirc;micos foram   classificados como casos graves quando apresentaram n&iacute;veis de Hb   abaixo de 10g/dL (para ambos os sexos) ou moderados quando apresentaram n&iacute;veis   de Hb entre 10 e 12g/dL, para o sexo feminino,   e 10 a 13g/dL, para o masculino<sup>5</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Outras vari&aacute;veis inclu&iacute;das no   estudo foram: caracter&iacute;sticas sociodemogr&aacute;ficas (sexo, idade e n&uacute;mero de anos   completos de escolaridade), hist&oacute;ria de diagn&oacute;stico m&eacute;dico para doen&ccedil;as   (diabetes mellitus, hipertens&atilde;o arterial e artrite), n&uacute;mero de medicamentos   consumidos nos &uacute;ltimos noventa dias, n&uacute;mero de consultas m&eacute;dicas e de   hospitaliza&ccedil;&otilde;es nos &uacute;ltimos 12 meses, tabagismo atual (entre os que haviam   fumado pelo menos 100 cigarros ao longo da vida), n&iacute;veis s&eacute;ricos de albumina   (mg/dL), n&iacute;veis s&eacute;ricos de creatinina (g/dL) e &iacute;ndice de massa corporal (IMC)   (definido como a raz&atilde;o entre o peso e o quadrado da altura &#150; kg/m<sup>2</sup>). N&iacute;veis de albumina foram considerados baixos   quando menores que 3,5g/dL. O idoso foi classificado como baixo peso quando apresentou   IMC abaixo de 18,5kg/m<sup>2</sup> e sobrepeso quando apresentou IMC acima de   24,99kg/m<sup>2 23</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><u>An&aacute;lise dos dados</u></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Inicialmente, realizou-se a descri&ccedil;&atilde;o de todas as   vari&aacute;veis por sexo, por interm&eacute;dio do teste do qui-quadrado de Pearson e o   teste t de Student, para compara&ccedil;&atilde;o entre frequ&ecirc;ncias e m&eacute;dias,   respectivamente. A an&aacute;lise de vari&acirc;ncia, complementada com teste de Bonferroni,   foi utilizada para compara&ccedil;&atilde;o do n&iacute;vel de Hb entre as faixas et&aacute;rias.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A an&aacute;lise multivariada foi realizada pela regress&atilde;o   linear m&uacute;ltipla, estimando-se os coeficientes da regress&atilde;o (&beta;) e respectivos intervalos de 95% de   confian&ccedil;a (IC95%), para avaliar a associa&ccedil;&atilde;o entre n&iacute;vel de Hb e as vari&aacute;veis:   n&uacute;mero de consultas m&eacute;dicas e de hospitaliza&ccedil;&otilde;es nos 12 meses precedentes &agrave;   entrevista, IMC e n&iacute;veis s&eacute;ricos de albumina. A an&aacute;lise foi ajustada por idade,   escolaridade, tabagismo, diabetes, hipertens&atilde;o, artrite, n&iacute;veis s&eacute;ricos de   creatinina e n&uacute;mero de medicamentos consumidos, descritos na literatura como   potenciais determinantes da redu&ccedil;&atilde;o dos n&iacute;veis de Hb em idosos<sup>24,25,26,27,28</sup>.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Todas as an&aacute;lises foram estratificadas por sexo e   realizadas valendo-se do pacote estat&iacute;stico Stata 10.0 (Stata Corp., College   Station, Estados Unidos).</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Resultados</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Entre os 1.441 idosos inclu&iacute;dos neste estudo, 561   (38,9%) eram homens e 880 (61,1%), mulheres. A <a href="/img/revistas/csp/v28n11/a08tab01.jpg">Tabela 1</a> apresenta as   caracter&iacute;sticas da popula&ccedil;&atilde;o estudada. A idade dos participantes variou entre   60 e 95 anos, sendo a m&eacute;dia igual 69,1 anos (desvio padr&atilde;o = 7,2 anos),   predominando a baixa escolaridade (64,7% tinham menos de quatro anos de   estudo). O tabagismo atual foi relatado por 18% dos participantes. A   hipertens&atilde;o arterial autorreferida foi a doen&ccedil;a mais prevalente (56,8%), e   apenas 13,4% dos idosos n&atilde;o relataram uso de medicamentos nos &uacute;ltimos tr&ecirc;s   meses. Vinte e um v&iacute;rgula nove por cento relataram pelo menos uma   hospitaliza&ccedil;&atilde;o e 80,6% uma consulta, no m&iacute;nimo, com m&eacute;dico no &uacute;ltimo ano. O   n&iacute;vel m&eacute;dio de Hb na popula&ccedil;&atilde;o idosa de Bambu&iacute; foi igual a 14,5g/dL   (desvio-padr&atilde;o = 1,4). Com exce&ccedil;&atilde;o da idade, as demais vari&aacute;veis apresentaram   diferen&ccedil;as significativas entre os sexos: os homens tinham maior escolaridade,   maior preval&ecirc;ncia de tabagismo e maiores n&iacute;veis de creatinina, albumina e   hemoglobina.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A <a href="/img/revistas/csp/v28n11/a08fig01.jpg">Figura 1</a> descreve o n&iacute;vel de hemoglobina na   popula&ccedil;&atilde;o estudada, segundo sexo. A curva de distribui&ccedil;&atilde;o da Hb entre os homens   apresenta-se deslocada para a direita, refletindo o maior n&iacute;vel m&eacute;dio observado   nesse grupo, em compara&ccedil;&atilde;o ao sexo feminino. J&aacute; a distribui&ccedil;&atilde;o do n&iacute;vel m&eacute;dio   de Hb por faixa et&aacute;ria mostra uma redu&ccedil;&atilde;o desses n&iacute;veis com o aumento da idade   em ambos os sexos, de forma que idosos mais velhos (&#8805; 80 anos)   apresentaram n&iacute;veis significativamente menores do que as duas faixas et&aacute;rias   mais jovens, tanto entre homens quanto entre mulheres (<a href="/img/revistas/csp/v28n11/a08fig02.jpg">Figura 2</a>).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A preval&ecirc;ncia de anemia na coorte foi de 4,5% (n =   65), sendo 4,8% (n = 27) no sexo masculino e 4,3% (n = 38) no feminino (p =   0,659). Quando avaliada entre os mais velhos (&#8805; 80 anos), os valores   foram significativamente maiores em compara&ccedil;&atilde;o com os dos mais jovens,   alcan&ccedil;ando 10,2% (n = 15) deste grupo (p &lt; 0,0001) (homens: 8,9%; n = 5 e   mulheres: 11%; n = 10; p = 0,689). Apenas 0,21% (n = 3) dos idosos tinha anemia   grave, sem diferen&ccedil;a entre os sexos (p = 0,842). A anemia moderada foi mais   prevalente, atingindo 3,86% (n = 62) da popula&ccedil;&atilde;o, mas igualmente sem diferen&ccedil;a   entre os sexos (p = 0,246).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A <a href="/img/revistas/csp/v28n11/a08tab02.jpg">Tabela 2</a> mostra a distribui&ccedil;&atilde;o do n&iacute;vel m&eacute;dio de   Hb de acordo com indicadores do uso de servi&ccedil;os de sa&uacute;de e do estado   nutricional dos idosos. Para o sexo masculino, o n&iacute;vel m&eacute;dio de Hb foi   significativamente menor entre aqueles com maior n&uacute;mero de consultas m&eacute;dicas no   &uacute;ltimo ano, baixos n&iacute;veis de albumina e desnutri&ccedil;&atilde;o/eutrofia. Para o sexo   feminino, menores n&iacute;veis m&eacute;dios de Hb foram observados entre as idosas com   hist&oacute;ria de hospitaliza&ccedil;&atilde;o no &uacute;ltimo ano e baixos n&iacute;veis de albumina.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Os resultados da regress&atilde;o linear m&uacute;ltipla para o   estudo da associa&ccedil;&atilde;o entre os n&iacute;veis de Hb e os indicadores do uso de servi&ccedil;os   de sa&uacute;de e do estado nutricional est&atilde;o apresentados na <a href="/img/revistas/csp/v28n11/a08tab03.jpg">Tabela 3</a>. Em ambos os   sexos, o relato de quatro ou mais consultas m&eacute;dicas nos &uacute;ltimos 12 meses foi   associado com menores n&iacute;veis de hemoglobina     (&beta; = -0,42 para homens e &beta; = -0,24 para mulheres). O aumento do IMC (&beta; = 0,07 para homens e     &beta; = 0,02 para mulheres) e da dosagem de   albumina (&beta; = 0,40 para ambos os sexos)   apresentou associa&ccedil;&atilde;o significativa com maiores n&iacute;veis de Hb em ambos os sexos.   N&atilde;o houve associa&ccedil;&atilde;o entre n&iacute;vel de Hb e ocorr&ecirc;ncia de hospitaliza&ccedil;&otilde;es na   popula&ccedil;&atilde;o estudada.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Discuss&atilde;o</b></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A redu&ccedil;&atilde;o dos n&iacute;veis de Hb e a ocorr&ecirc;ncia de   anemia em idosos j&aacute; foram consideradas como consequ&ecirc;ncia natural do processo de   envelhecimento<sup>6,29</sup>. No entanto, evid&ecirc;ncias cient&iacute;ficas acumuladas   ao longo do tempo demonstraram que a anemia est&aacute; relacionada a piores condi&ccedil;&otilde;es   de sa&uacute;de, aumentando a vulnerabilidade dessa popula&ccedil;&atilde;o para consequ&ecirc;ncias   adversas<sup>6,8</sup>.     A preval&ecirc;ncia de anemia na popula&ccedil;&atilde;o idosa de Bambu&iacute; foi de 4,5%, n&atilde;o   apresentando diferen&ccedil;a significativa entre os sexos. Esse percentual &eacute; superior   &agrave;quele esperado para uma popula&ccedil;&atilde;o saud&aacute;vel (2,5%), mas n&atilde;o se configura como   um problema de sa&uacute;de p&uacute;blica (&lt; 5%)<sup>22</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Diversas pesquisas realizadas no Brasil e em outros   pa&iacute;ses mostraram resultados contrastantes no que se refere &agrave; preval&ecirc;ncia de   anemia, considerando os mesmos pontos de corte adotados no presente estudo.   Entre idosos cadastrados no PSF de dois munic&iacute;pios brasileiros, a preval&ecirc;ncia   de anemia em Vi&ccedil;osa, Minas Gerais (4,5%)<sup>13</sup>, foi semelhante &agrave;   observada em Bambu&iacute;; contudo, entre os idosos do Munic&iacute;pio de Camaragibe,   Pernambuco<sup>14</sup>, essa preval&ecirc;ncia foi mais elevada (12%). Em amostra   n&atilde;o probabil&iacute;stica de idosos saud&aacute;veis do Munic&iacute;pio de Gravata&iacute;<sup>1</sup>,   Rio Grande do Sul, a anemia foi diagnosticada em 4,3% da popula&ccedil;&atilde;o. Em estudo   de base populacional conduzido em &aacute;reas de baixa condi&ccedil;&atilde;o socioecon&ocirc;mica do   Munic&iacute;pio de S&atilde;o Paulo<sup>15</sup>, a preval&ecirc;ncia de anemia entre indiv&iacute;duos   com idade igual ou superior a 65 anos foi tamb&eacute;m mais elevada (10,2%), quando   comparada &agrave; observada em Bambu&iacute;. Investiga&ccedil;&otilde;es realizadas em outros pa&iacute;ses   tamb&eacute;m encontraram preval&ecirc;ncias mais elevadas, com exce&ccedil;&atilde;o da Coreia do Sul<sup>30</sup>,   com apenas 1,5% de idosos an&ecirc;micos. Nos Estados Unidos<sup>6</sup>, dados do <i>National Health and Nutrition Examination     Survey</i> (NHANES III) demonstraram que 10,6% dos indiv&iacute;duos com 65   anos ou mais estavam an&ecirc;micos, enquanto, entre os idosos participantes de outro   estudo americano (<i>Cardiovascular     Health Study &#150; </i>CHS)<sup>31</sup>, a preval&ecirc;ncia foi de 8,5%. Na   It&aacute;lia, o <i>InCHIANTY Study </i><sup>32</sup> tamb&eacute;m encontrou preval&ecirc;ncia superior (12%) &agrave; observada em Bambu&iacute;.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Apesar da grande varia&ccedil;&atilde;o na   preval&ecirc;ncia de anemia observada na literatura, os resultados s&atilde;o consistentes   no que se refere &agrave; redu&ccedil;&atilde;o dos n&iacute;veis de Hb com o aumento da idade, elevando a   preval&ecirc;ncia de anemia entre os idosos mais velhos<sup>30,32,33</sup>, como   observado na popula&ccedil;&atilde;o de Bambu&iacute;. Dois estudos norte-americanos de base   populacional ilustram esse fato. Em um deles<sup>34</sup>, a preval&ecirc;ncia de   anemia aumentou significativamente com o aumento da idade,   verificando-se que 32% dos idosos acima de 80 anos tinham   anemia, em compara&ccedil;&atilde;o a 25% daqueles entre 75 e 79 anos e 17% dos com idade entre 65 e 74 anos. Da mesma forma, idosos acima de 85   anos avaliados no NHANES III<sup>6</sup> apresentaram preval&ecirc;ncia de anemia   igual a 25%, expressivamente maior que a encontrada na popula&ccedil;&atilde;o idosa total   (10,6%). Dados do <i>InCHIANTY     Study </i><sup>35</sup> indicaram que, em m&eacute;dia, h&aacute; um decl&iacute;nio de 0,75g/dL nos   n&iacute;veis de Hb em homens e de 0,5g/dL em mulheres ap&oacute;s os 60 anos. Esse   achado justifica a rela&ccedil;&atilde;o entre a   preval&ecirc;ncia de anemia e a idade do indiv&iacute;duo, ressaltando a import&acirc;ncia dos   baixos n&iacute;veis de Hb para a sa&uacute;de de idosos mais velhos.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A associa&ccedil;&atilde;o entre   baixos n&iacute;veis de Hb e pior estado nutricional n&atilde;o tem sido muito explorada na   literatura<sup>17,18</sup>, sobretudo em estudos de base populacional, apesar   de a defici&ecirc;ncia nutricional ser considerada um importante fator etiol&oacute;gico   para anemia<sup> 2</sup>. Por outro   lado, entre idosos hospitalizados essa rela&ccedil;&atilde;o j&aacute; est&aacute; bem estabelecida, sendo   a anemia fortemente associada a baixos valores de IMC e de albumina s&eacute;rica<sup>8,18,19,20</sup>.   Chama a aten&ccedil;&atilde;o o fato de que os resultados encontrados em Bambu&iacute; s&atilde;o congruentes   com os estudos de base populacional realizados em outros pa&iacute;ses, refor&ccedil;ando a   associa&ccedil;&atilde;o encontrada na literatura para popula&ccedil;&atilde;o idosa hospitalizada. Dados   da linha de base do estudo prospectivo norte-americano <i>Established Populations     for Epidemiologic Studies of the Elderly </i><sup>24</sup> demonstraram que a anemia ou anemia lim&iacute;trofe (Hb entre 12 e 13g/dL para   mulheres e 13 e 14g/dL para homens) apresentou associa&ccedil;&atilde;o significativa com   menores valores de IMC e de albumina entre idosos acima de 70 anos vivendo em   comunidade. Em estudo realizado com 2.550 adultos de meia idade e idosos   chineses (&#8805; 55 anos)<sup>36</sup>, a redu&ccedil;&atilde;o dos n&iacute;veis de Hb foi   associada &agrave; tamb&eacute;m redu&ccedil;&atilde;o dos n&iacute;veis de albumina s&eacute;rica. Al&eacute;m disso, aqueles   com IMC abaixo do recomendado apresentaram n&iacute;veis m&eacute;dios de Hb   significativamente menores quando comparados aos com estado nutricional   adequado. De forma semelhante, Zakai et al.<sup>31</sup> avaliaram 5.797 idosos   de ambos os sexos participantes do <i>Cardiovascular Health Study</i> (Estados Unidos) e verificaram que baixos n&iacute;veis de   Hb foram significativamente associados a menores valores de IMC e albumina   s&eacute;rica, al&eacute;m de maior fragilidade, insufici&ecirc;ncia card&iacute;aca congestiva, derrame e   elevados n&iacute;veis de creatinina. Portanto, os resultados obtidos em Bambu&iacute;   mostram que essa associa&ccedil;&atilde;o pode ser tamb&eacute;m verificada entre idosos   brasileiros, com destaque para o impacto da defici&ecirc;ncia nutricional sobre   n&iacute;veis s&eacute;ricos de Hb nessa popula&ccedil;&atilde;o. Em adi&ccedil;&atilde;o, deve ser considerado que essa   an&aacute;lise foi ajustada por outros fatores determinantes do n&iacute;vel de hemoglobina   em popula&ccedil;&atilde;o idosa.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A associa&ccedil;&atilde;o entre   anemia e maior utiliza&ccedil;&atilde;o dos servi&ccedil;os de sa&uacute;de pelos idosos est&aacute; bem   estabelecida na literatura, ocasionando aumento importante para os custos do   sistema<sup>37,38</sup>. A an&aacute;lise dos dados de idosos cadastrados no Sistema   de Sa&uacute;de Integrado dos Estados Unidos<sup>39</sup> verificou associa&ccedil;&atilde;o   significativa entre anemia cr&ocirc;nica e maior procura pelo servi&ccedil;o de sa&uacute;de,   interna&ccedil;&otilde;es mais prolongadas e, consequentemente, maior custo para o sistema.   Outro estudo realizado no mesmo pa&iacute;s<sup>40</sup> mostrou que os idosos (<u>&gt;</u> 65 anos) an&ecirc;micos tinham m&eacute;dias significativamente maiores de consultas m&eacute;dicas   e hospitaliza&ccedil;&otilde;es, bem como maior tempo m&eacute;dio de perman&ecirc;ncia no hospital,   quando comparados aos n&atilde;o an&ecirc;micos. Maior ocorr&ecirc;ncia e maior tempo de   hospitaliza&ccedil;&otilde;es entre idosos an&ecirc;micos, comparados aos n&atilde;o an&ecirc;micos, foram   tamb&eacute;m observados em dois estudos prospectivos, um norte-americano<sup>41</sup> e outro italiano<sup>10</sup>. No Brasil, a anemia &eacute; relatada, na maioria das   vezes, como causa intermedi&aacute;ria de interna&ccedil;&otilde;es entre idosos. Estudo realizado   com aqueles atendidos em unidades b&aacute;sicas de sa&uacute;de do Munic&iacute;pio de Vi&ccedil;osa<sup>42</sup> demonstrou que apenas 1,1% dos atendimentos prestados a este grupo teve como   causa direta a anemia. </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Deve-se ressaltar que, al&eacute;m da anemia, baixos n&iacute;veis   de Hb tamb&eacute;m t&ecirc;m impacto sobre o aumento do tempo de perman&ecirc;ncia no ambiente   hospitalar e sobre o custo financeiro do tratamento<sup>43</sup>. Sua redu&ccedil;&atilde;o   pode representar um primeiro sinal de doen&ccedil;as ainda n&atilde;o diagnosticadas, al&eacute;m   de, por si s&oacute;, estar associada &agrave; maior fragilidade do idoso, levando ao aumento   da demanda por atendimento em sa&uacute;de<sup>16,39,40</sup>. Em Bambu&iacute;, os resultados   encontrados s&atilde;o concordantes com os dados expostos. Apesar de o relato de   hospitaliza&ccedil;&otilde;es no &uacute;ltimo ano n&atilde;o ter sido relacionado a menores n&iacute;veis de Hb,   a associa&ccedil;&atilde;o destes com o n&uacute;mero de consultas m&eacute;dicas, independentemente de   outros fatores de confus&atilde;o, indica que a rela&ccedil;&atilde;o entre n&iacute;vel de Hb e uso de   servi&ccedil;os de sa&uacute;de pode tamb&eacute;m ser observada na popula&ccedil;&atilde;o idosa, como forma de   primeiro acesso e aumento das demandas de atendimento em sa&uacute;de ainda numa fase   pr&eacute;-cl&iacute;nica da anemia. Essa associa&ccedil;&atilde;o &eacute; relevante para sa&uacute;de p&uacute;blica,   considerando-se o aumento da popula&ccedil;&atilde;o idosa observado no Brasil e no mundo, a   redu&ccedil;&atilde;o dos n&iacute;veis de Hb com o aumento da idade e o aumento dos gastos p&uacute;blicos   com o setor sa&uacute;de associados a essa condi&ccedil;&atilde;o<sup>38,44</sup>.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A caracter&iacute;stica   transversal deste estudo n&atilde;o permite estabelecer uma rela&ccedil;&atilde;o causal entre   estado nutricional, consultas m&eacute;dicas e n&iacute;vel de Hb na popula&ccedil;&atilde;o estudada. No   entanto, os resultados encontrados contribuem para maior esclarecimento sobre a   associa&ccedil;&atilde;o de n&iacute;veis de Hb com vari&aacute;veis nutricionais e uso de servi&ccedil;os de   sa&uacute;de, ressaltando a escassez de estudos de base populacional, sendo este o   primeiro realizado no Brasil.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Concluindo, as associa&ccedil;&otilde;es observadas sugerem um   ciclo complexo entre baixos n&iacute;veis de hemoglobina, desnutri&ccedil;&atilde;o e uso de   servi&ccedil;os de sa&uacute;de entre idosos, de forma independente do diagn&oacute;stico de anemia.   Tal rela&ccedil;&atilde;o deve ser considerada para a estrutura&ccedil;&atilde;o de programas de sa&uacute;de para   esse grupo et&aacute;rio, visto que a redu&ccedil;&atilde;o dos n&iacute;veis de Hb &eacute; uma condi&ccedil;&atilde;o   potencialmente revers&iacute;vel, e seu tratamento pode adiar ou mesmo prevenir a   ocorr&ecirc;ncia de doen&ccedil;as relacionadas ao envelhecimento.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Colaboradores</b></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">C. L. A. Silva realizou a an&aacute;lise dos dados, a   interpreta&ccedil;&atilde;o dos resultados e a reda&ccedil;&atilde;o do manuscrito. M. F. Lima-Costa e S.   V. Peixoto orientaram o trabalho, participando da discuss&atilde;o dos resultados,   reda&ccedil;&atilde;o e revis&atilde;o do texto final. J. O. A. Firmo coordenou o trabalho de campo   de Bambu&iacute; e participou da discuss&atilde;o dos resultados e revis&atilde;o do texto. </font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Refer&ecirc;ncias</b></font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1. Schaan MDA, Schwanke CHA, Bauer   M, Luz C, Cruz IM. Hematological and nutritional parameters in apparently   healthy elderly individuals. 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Rio de Janeiro: Instituto de Pesquisa Econ&ocirc;mica   Aplicada; 2004. p. 427-53.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1161068&pid=S0102-311X201200110000800043&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">44. Robinson B. Cost of anemia in the   elderly. J Am Geriatr Soc 2003; 51 Suppl:S14-7.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1161070&pid=S0102-311X201200110000800044&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><a name="end"></a><a href="#top"><img src="/img/revistas/csp/v28n11/seta.jpg" border="0"></a> <font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Correspond&ecirc;ncia</b><br />   C. L. A.   Silva<br />   N&uacute;cleo de   Estudos em Sa&uacute;de P&uacute;blica e Envelhecimento, Funda&ccedil;&atilde;o Oswaldo Cruz/Universidade   Federal de Minas Gerais.<br />   Av. Augusto   de Lima 1715,     6º andar, Belo Horizonte, MG 30190-002, Brasil.<br />   <a href="mailto:claricelas@cpqrr.fiocruz.br">claricelas@cpqrr.fiocruz.br</a></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Recebido em 26/Mar/2012<br />   Aprovado em 17/Ago/2012</font></p>      ]]></body><back>
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