<?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>0004-0622</journal-id>
<journal-title><![CDATA[Archivos Latinoamericanos de Nutrición]]></journal-title>
<abbrev-journal-title><![CDATA[ALAN]]></abbrev-journal-title>
<issn>0004-0622</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Latinoamericana de Nutrición]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0004-06222010000400006</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Iodação do sal e ingestão excessiva de iodo em crianças]]></article-title>
<article-title xml:lang="en"><![CDATA[Salt iodination and excessive iodine intake among schoolchildren]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[Anderson Marliere]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[Luciana Abrão]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meirelles]]></surname>
<given-names><![CDATA[Clarissa Janson Costa de Souza]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[Telma Maria Braga]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidade de São Paulo Faculdade de Medicina de Ribeirão Preto Departamento de Clínica Médica]]></institution>
<addr-line><![CDATA[Ribeirão Preto São Paulo]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2010</year>
</pub-date>
<volume>60</volume>
<numero>4</numero>
<fpage>355</fpage>
<lpage>359</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_arttext&amp;pid=S0004-06222010000400006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_abstract&amp;pid=S0004-06222010000400006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_pdf&amp;pid=S0004-06222010000400006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[O presente trabalho tem como objetivo avaliar a excreção urinária de iodo e relacionar com a sua quantidade presente no sal de consumo humano. Participaram do estudo 145 crianças de duas escolas: uma de zona rural e outra de urbana. Foram realizadas avaliação antropométrica e coleta de amostra de urina e do sal de cozinha cada uma das crianças voluntárias. Na escola rural, 3,8% das crianças apresentaram deficiência de iodo. Entretanto, a maioria dos valores de iodúria ficou acima de 300&#956;g/L (62,03%) com 59,49% das amostras do sal de cozinha entre 20 e 60mg de iodo por quilo de sal. Para a escola urbana, 3,03% das crianças apresentaram iodúria inferior à 100&#956;g/L, sendo que, 90,91% das crianças apresentaram valores de iodúria superior a 300&#956;g/L. Desse total, 84,85% das amostras do sal de cozinha encontrava-se entre 20 e 60mg de iodo por quilo de sal. A deficiência de iodo na população estudada está controlada, destacando-se agora uma nova realidade de alta prevalência de excesso de iodo urinário.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The objective of the present study was to evaluate the urinary excretion of iodine and relate it to the amount present in salt for human consumption. The study involved 145 children from two schools: a rural one and an urban one. We performed anthropometric measurements and collected a urine sample and a kitchen salt sample from each child. In the rural school, 3.38% of children had iodine deficiency. However, most of the values of urinary iodine were above 300 &#956;g/L (62.03%) and 59.49% of the kitchen salt samples contained 20 to 60 mg iodine per kilo of salt. In the urban school, 3.03% of the children had urinary iodine excretion of less than 100 &#956;g/L and 90.91% of the children had urinary iodine values exceeding 300 &#956;g/L. Of this total, 84.85% of the kitchen salt samples contained 20 to 60 mg iodine per kilo of salt. Iodine deficiency is controlled in this population, with the current reality showing a high prevalence of excess urinary iodine.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Iodúria]]></kwd>
<kwd lng="pt"><![CDATA[sal]]></kwd>
<kwd lng="pt"><![CDATA[crianças]]></kwd>
<kwd lng="en"><![CDATA[Urinary iodine]]></kwd>
<kwd lng="en"><![CDATA[salt]]></kwd>
<kwd lng="en"><![CDATA[children]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  					    <p align="center">                     <font face="Verdana"><b>Iodação do sal e ingestão excessiva de iodo em crianças</b></font></p> 					    <p align="center"><font size="2" face="Verdana">Anderson Marliere Navarro, Luciana Abrão Oliveira, Clarissa Janson Costa de Souza Meirelles, Telma Maria Braga Costa</font></p> 					    <p align="justify"><font size="2" face="Verdana">Departamento de Cl&iacute;nica M&eacute;dica, Faculdade de Medicina de Ribeir&atilde;o Preto, Universidade de S&atilde;o Paulo, Ribeir&atilde;o Preto -S&atilde;o Paulo. Brasil</font></p>                         <p align="justify"><font face="Verdana" size="2"><span>                     <b>RESUMO</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     O presente trabalho tem como objetivo avaliar a excre&ccedil;&atilde;o urin&aacute;ria de iodo e relacionar com a sua quantidade presente no sal de consumo humano. Participaram do estudo 145 crian&ccedil;as de duas escolas: uma de zona rural e outra de urbana. Foram realizadas avalia&ccedil;&atilde;o antropom&eacute;trica e coleta de amostra de urina e do sal de cozinha cada uma das crian&ccedil;as volunt&aacute;rias. Na escola rural, 3,8% das crian&ccedil;as apresentaram defici&ecirc;ncia de iodo. Entretanto, a maioria dos valores de iod&uacute;ria ficou acima de 300&#956;g/L (62,03%) com 59,49% das amostras do sal de cozinha entre 20 e 60mg de iodo por quilo de sal. Para a escola urbana, 3,03% das crian&ccedil;as apresentaram iod&uacute;ria inferior &agrave; 100&#956;g/L, sendo que, 90,91% das crian&ccedil;as apresentaram valores de iod&uacute;ria superior a 300&#956;g/L. Desse total, 84,85% das amostras do sal de cozinha encontrava-se entre 20 e 60mg de iodo por quilo de sal. A defici&ecirc;ncia de iodo na popula&ccedil;&atilde;o estudada est&aacute; controlada, destacando-se agora uma nova realidade de alta preval&ecirc;ncia de excesso de iodo urin&aacute;rio.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Palavras chave:</b> Iod&uacute;ria, sal e crian&ccedil;as.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>SUMMARY</b></span></font>    <p align="center"> 					<font face="Verdana" size="2"><span>                     <b>Salt iodination and excessive iodine intake among schoolchildren</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     The objective of the present study was to evaluate the urinary excretion of iodine and relate it to the amount present in salt for human consumption. The study involved 145 children from two schools: a rural one and an urban one. We performed anthropometric measurements and collected a urine sample and a kitchen salt sample from each child. In the rural school, 3.38% of children had iodine deficiency.  However, most of the values of urinary iodine were above 300  					&#956;g/L (62.03%) and 59.49% of the kitchen salt samples contained 20 to 60 mg iodine per kilo of salt. In the urban school, 3.03% of the children had urinary iodine excretion of less than 100  					&#956;g/L and 90.91% of the children had urinary iodine values exceeding 300  					&#956;g/L.  Of this total, 84.85% of the kitchen salt samples contained 20 to 60 mg iodine per kilo of salt.  Iodine deficiency is controlled in this population, with the current reality showing a high prevalence of excess urinary iodine.</span></font>    ]]></body>
<body><![CDATA[<p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Key words:</b> Urinary iodine, salt, children.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><b>Recibido: 09/08/2010</b></font>    <p align="justify"> 					<font face="Verdana" size="2"><b>Aceptado: 27/10/2010</b></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>INTRODU&Ccedil;&Atilde;O</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     O iodo &eacute; um nutriente essencial, amplamente encontrado na natureza, especialmente na &aacute;gua dos oceanos (1), entretanto, se distribui de forma irregular sobre a superf&iacute;cie terrestre. Sua principal fun&ccedil;&atilde;o no corpo humano &eacute; a participa&ccedil;&atilde;o na s&iacute;ntese dos horm&ocirc;nios da tir&oacute;ide. Desta maneira, o iodo tem influ&ecirc;ncia importante no organismo como um todo atrav&eacute;s de sua participa&ccedil;&atilde;o nos processos metab&oacute;licos (2).</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     Geralmente a ingest&atilde;o inadequada de iodo est&aacute; associada &agrave; ocorr&ecirc;ncia de um grupo de situa&ccedil;&otilde;es cl&iacute;nicas denominadas Desordens por Defici&ecirc;ncia de Iodo ou, em ingl&ecirc;s, Iodine Deficiency Disorders – IDD.  A forma de corre&ccedil;&atilde;o dessas car&ecirc;ncias &eacute; a fortifica&ccedil;&atilde;o de alimentos de uso massivo. Atualmente, a estrat&eacute;gia usual para garantir a sufici&ecirc;ncia de iodo no Brasil &eacute; a fortifica&ccedil;&atilde;o do sal de cozinha, j&aacute; que os alimentos naturais n&atilde;o garantem uma ingest&atilde;o adequada de iodo.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     A forma mais utilizada para verificar e monitorar a adequa&ccedil;&atilde;o da ingest&atilde;o desse nutriente &eacute; a iod&uacute;ria, pois a sua ingest&atilde;o de iodo correlaciona-se diretamente com a sua excre&ccedil;&atilde;o urin&aacute;ria (3). Portanto, a iod&uacute;ria &eacute; um importante marcador para avalia&ccedil;&atilde;o da sufici&ecirc;ncia de iodo. Desta forma, o presente trabalho tem como objetivo avaliar a excre&ccedil;&atilde;o urin&aacute;ria de iodo e relacionar com a sua quantidade presente no sal de consumo humano.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>MATERIAIS E M&Eacute;TODOS</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Local de pesquisa e grupo de estudo</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     O trabalho foi realizado em duas escolas de Botucatu-SP (Rural e Urbana), selecionadas pela facilidade de acesso e consentimento de participa&ccedil;&atilde;o. Foram inclu&iacute;das crian&ccedil;as e adolescentes, saud&aacute;veis, sem diagn&oacute;stico de dist&uacute;rbios renais ou qualquer altera&ccedil;&atilde;o patol&oacute;gica de ambos os g&ecirc;neros, com idades entre 6 e 12 anos. Participaram 79 estudantes da escola rural e 66 estudantes de uma escola urbana, totalizando 145 crian&ccedil;as e adolescentes. Para a participa&ccedil;&atilde;o volunt&aacute;ria foram inclu&iacute;das apenas as crian&ccedil;as que os pais autorizaram depois de assinarem um termo de consentimento livre e esclarecido aprovado pelo comit&ecirc; de &eacute;tica em pesquisa do HCFMRP - USP e FMRP-USP (processo n&uacute;mero 12466/2004).</span></font>    ]]></body>
<body><![CDATA[<p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Avalia&ccedil;&atilde;o antropom&eacute;trica</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     Com o objetivo de caracterizar o estado nutricional das crian&ccedil;as volunt&aacute;rias foi realizada uma avalia&ccedil;&atilde;o antropom&eacute;trica. Todas as medidas foram realizadas pelo mesmo pesquisador, ap&oacute;s padroniza&ccedil;&atilde;o dos equipamentos e procedimentos a serem utilizados de acordo com as t&eacute;cnicas descritas por Gordon et al (4). As medidas foram realizadas nas pr&oacute;prias escolas, de acordo com a disponibilidade de cada uma delas, e ap&oacute;s consentimento anteriormente informado autorizado pelo respons&aacute;vel do escolar.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     As vari&aacute;veis do estado nutricional utilizadas foram: peso, estatura, idade e sexo. Os indicadores do estado nutricional foram: peso para idade (PI), estatura para idade (E/I) e &iacute;ndice de massa corporal para idade (IMC/I). Os pontos de corte adotados foram os definidos pela WHO (5). Para os c&aacute;lculos dos valores de escore z, utilizou-se o software Epiinfo, vers&atilde;o 3.2, 2004, segundo os valores de refer&ecirc;ncia do CDC/NCHS (6).</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Coleta de amostras de urina e sal de cozinha</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     Foram coletadas uma amostra casual de urina e uma de sal de cozinha utilizada no domic&iacute;lio de cada crian&ccedil;a volunt&aacute;ria.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Metodologia para avalia&ccedil;&atilde;o da excre&ccedil;&atilde;o urin&aacute;ria de iodo</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     Para a dosagem de iodo na urina foi utilizada a rea&ccedil;&atilde;o Sandell & Kalthoff (7,8), substituindo o &aacute;cido cl&oacute;rico por persulfato de am&ocirc;nia (9).</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     A amostra foi tratada com persulfato de am&ocirc;nia sob condi&ccedil;&otilde;es m&eacute;dias de aquecimento e o iodeto foi determinado pelo seu papel catal&iacute;tico na redu&ccedil;&atilde;o do &iacute;on c&eacute;rico (Ce<sup>4+</sup>) para &iacute;on c&eacute;rio (Ce<sup>3+</sup>), acoplada &agrave; oxida&ccedil;&atilde;o do &iacute;on arsenioso (As<sup>3+</sup>) para &iacute;on ars&ecirc;nico (As<sup>5+</sup>). O &iacute;on c&eacute;rico (Ce<sup>4+</sup>) tem cor amarela, enquanto o &iacute;on c&eacute;rio (Ce<sup>3+</sup>) &eacute; incolor. Assim, o curso da rea&ccedil;&atilde;o pode ser seguido pelo desaparecimento da cor amarelada &agrave; medida que o &iacute;on c&eacute;rico &eacute; reduzido. Mantidos os demais reagentes est&aacute;veis, a velocidade do desaparecimento da cor na rea&ccedil;&atilde;o &eacute; diretamente proporcional &agrave; quantidade de iodo que est&aacute; catalisando.</span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>Metodologia da an&aacute;lise de iodo no sal de consumo humano</b></span></font>    <p align="justify"> 					<font face="Verdana" size="2"><span>                     A an&aacute;lise de iodo no sal de consumo humano foi realizada de acordo com a t&eacute;cnica recomendada pelo Minist&eacute;rio da Sa&uacute;de (10). Em presen&ccedil;a de iodeto de pot&aacute;ssio (KI) e em meio &aacute;cido, o iodato de pot&aacute;ssio (KIO<sub>3</sub>) reage liberando iodo, que &eacute; imediatamente titulado com tiosulfato de s&oacute;dio, usando-se solu&ccedil;&atilde;o de amido como indicador.</span></font>    ]]></body>
<body><![CDATA[<p align="justify"> 					<font face="Verdana" size="2"><span>                     <b>RESULTADOS</b></span></font>    <p align="justify"><span>                     <font face="Verdana" size="2">Os dados antropom&eacute;tricos est&atilde;o apresentadas nas 					<a href="#tab1">Tabelas 1, 2 e 3</a> sendo separados por escola, faixa et&aacute;ria, sexo, medida antropom&eacute;trica e valores de escore Z para os diferentes indicadores antropom&eacute;tricos.</font></span>    <p align="center"> 					<a name="tab1"> 					<img border="0" src="/img/fbpe/alan/v60n4/art06tab1.gif" width="575" height="222"></a>    
<p align="center"> 					<img border="0" src="/img/fbpe/alan/v60n4/art06tab2.gif" width="384" height="316">    
<p align="center"> 					<span>                     <font face="Verdana" size="2"> 					<img border="0" src="/img/fbpe/alan/v60n4/art06tab3.gif" width="382" height="317">    
<p align="justify">A  					<a href="#tab4">Tabela 4</a> representa a associa&ccedil;&atilde;o entre iod&uacute;ria e iodo adicionado ao sal de uso dom&eacute;stico para as crian&ccedil;as que estudavam na Escola Rural.</p> 					    <p align="center"><a name="tab4"> 					<img border="0" src="/img/fbpe/alan/v60n4/art06tab4.gif" width="382" height="253"></a></p> 					    
<p align="justify">P&ocirc;de ser observado que 3,8% das amostras de iod&uacute;ria e iodo no sal se encontravam abaixo de 100&#956;g/L e 3,8% entre 20 a 60mg de iodo/kg de sal de cozinha. Para iod&uacute;ria de 100 a 200&#956;g/L, a porcentagem encontrada foi de 11,39%, sendo que 1,27% apresentou menos de 20mg de iodo/kg de sal, 8,86% entre 20 e 60mg de iodo/kg e 1,27% acima de 60mg/kg. Para as concentra&ccedil;&otilde;es de 200 a 300&#956;g/L, obteve-se 22,78% do total, sendo que 20,25% com valores de iodo no sal de cozinha entre 20 e 60mg/kg de sal e 2,53% acima de 60mg/kg. A maioria das amostras (62,03%) apresentava iod&uacute;ria acima de 300&#956;g/L. Do total dessa maioria, 2,53% estavam com valores de iodo no sal de cozinha inferior a 20mg/kg e 59,49% entre 20 e 60mg/kg de sal.</p> 					    <p align="justify">A <a href="#tab5">Tabela 5</a> representa a associa&ccedil;&atilde;o entre os valores de iod&uacute;ria e iodo adicionado ao sal de uso dom&eacute;stico, para as crian&ccedil;as que estudavam na Escola Urbana.</p> 					    <p align="center"><a name="tab5"> 					<img border="0" src="/img/fbpe/alan/v60n4/art06tab5.gif" width="384" height="261"></a></p> 					    
]]></body>
<body><![CDATA[<p align="justify">Foi observado que 3,03% das amostras de iod&uacute;ria e iodo no sal se encontravam abaixo de 100&#956;g/L e de 20mg de iodo/kg de sal de cozinha; para iod&uacute;ria de 100 a 200&#956;g/L n&atilde;o foram encontrados resultados. Para as amostras com concentra&ccedil;&otilde;es de 200 a 300&#956;g/L, 6,06% apresentou valores entre 20 e 60mg de iodo/kg de sal. A grande maioria das amostras de iod&uacute;ria, 90,91%, teve concentra&ccedil;&otilde;es acima de 300&#956;g/L, sendo que 6,06% delas com valores de iodo no sal de cozinha abaixo de 20mg/kg de sal e 84,85% entre 20 e 60mg de iodo/kg.</p> 					    <p align="justify"><b>DISCUSS&Atilde;O</b></p> 					    <p align="justify">Assim como encontrado em outros pa&iacute;ses em desenvolvimento, como por exemplo mostra Ovelar e colaboradores em estudo realizado em 2006 no Paraguai (11), o Brasil tamb&eacute;m tem apresentado profundas modifica&ccedil;&otilde;es no perfil nutricional de sua popula&ccedil;&atilde;o, fruto de um processo conhecido como transi&ccedil;&atilde;o nutricional (12-14).</p> 					    <p align="justify">Tal situa&ccedil;&atilde;o p&ocirc;de ser documentada por inqu&eacute;ritos domiciliares nacionais ou regionais realizados entre os per&iacute;odos de 1975-1997 e outro realizado mais recentemente entre 2002 e 2003, cujos dados evidenciam uma clara tend&ecirc;ncia de diminui&ccedil;&atilde;o da desnutri&ccedil;&atilde;o em todo o pa&iacute;s, mas em intensidades diferentes dependendo da regi&atilde;o e do estrato social (15).</p> 					    <p align="justify">Em rela&ccedil;&atilde;o a estes dados antropom&eacute;tricos encontrou-se em geral situa&ccedil;&otilde;es diferentes entre as duas escolas (rural e urbana), mas que em conjunto colaboram para estas estat&iacute;sticas. Para os escolares rurais, considerando o sexo masculino, p&ocirc;de ser evidenciado uma preval&ecirc;ncia de 7,7% de crian&ccedil;as com baixo peso e 2,6% com obesidade. Na escola urbana 5,1% apresentavam baixo peso, 7,1% obesidade. Estes dados comprovam os achados do IBGE (15) onde o baixo peso &eacute; maior em zonas rurais em rela&ccedil;&atilde;o &agrave;s urbanas.</p> 					    <p align="justify">A preval&ecirc;ncia de sobrepeso e obesidade vem aumentando tamb&eacute;m nos pa&iacute;ses em desenvolvimento, onde as defici&ecirc;ncias nutricionais e doen&ccedil;as infecciosas desempenhavam um papel central nesse quadro e, hoje predominam as doen&ccedil;as cardiovasculares e outras doen&ccedil;as cr&ocirc;nico-n&atilde;o transmiss&iacute;veis, em fun&ccedil;&atilde;o das mudan&ccedil;as no estilo de vida acompanhadas de altera&ccedil;&atilde;o na estrutura da dieta e na composi&ccedil;&atilde;o corporal dos indiv&iacute;duos (15, 14,16). Entre menores de cinco anos, al&eacute;m da tend&ecirc;ncia declinante de subnutri&ccedil;&atilde;o, destacam-se preval&ecirc;ncias relativamente baixas e est&aacute;veis de sobrepeso e obesidade, situando-se em torno de 5% (16). Em contraposi&ccedil;&atilde;o, em crian&ccedil;as de 6 a 10 anos e nos adolescentes pode-se considerar que o sobrepeso &eacute; a altera&ccedil;&atilde;o nutricional em ascens&atilde;o. De acordo com Wang et al. (17), a preval&ecirc;ncia de sobrepeso aumentou de 4,9 para 17,4% entre crian&ccedil;as de 6 a 9 anos e de 3,7 para 12,6% nos jovens entre 10-18 anos nas ultimas d&eacute;cadas (18, 5). Resultados semelhantes foram evidenciados nesse estudo que tamb&eacute;m est&atilde;o em concord&acirc;ncia com os dados do IBGE (15).</p> 					    <p align="justify">Considerando a sufici&ecirc;ncia ou n&atilde;o de iodo, o quarto inqu&eacute;rito nacional da excre&ccedil;&atilde;o urin&aacute;ria de iodo, realizado de Norte a Sul do Brasil, revelou que 86,5% dos escolares apresentavam excre&ccedil;&atilde;o urin&aacute;ria acima de 300&#956;g/L (19, 20), mostrando que a preval&ecirc;ncia de defici&ecirc;ncia de iodo e b&oacute;cio no Brasil se encontram dentro das metas recomendadas pela Organiza&ccedil;&atilde;o Mundial da Sa&uacute;de.</p> 					    <p align="justify">Duarte et al. (21), avaliando o estado nutricional de escolares no estado de S&atilde;o Paulo, encontrou  53% das crian&ccedil;as com excre&ccedil;&atilde;o urin&aacute;ria de iodo acima de 300  					&#956;g/L.</p> 					    <p align="justify">Em nosso trabalho encontramos 62,03% das crian&ccedil;as da escola rural e 90,91% da escola urbana com valores de iod&uacute;ria acima de 300  					&#956;g/L, valores estes acima da m&eacute;dia do estado como demonstrado por Duarte (21).</p> 					    <p align="justify">Silva e Munasinghe (22), avaliando excre&ccedil;&atilde;o urin&aacute;ria de iodo em adolescentes do sexo feminino e gestantes encontrou, respectivamente, uma varia&ccedil;&atilde;o de 51,9 a 1395,6  					&#956;g/L e 13,6 a 785,6&#956;g/L e, 56% das adolescentes e 39% das gestantes apresentavam valores superiores a 300  					&#956;g/L, sugerindo o risco aumentado principalmente para as adolescentes de hipertiroidismo induzido por iodo e a necessidade de avalia&ccedil;&atilde;o do programa de fortifica&ccedil;&atilde;o do sal. O sal como ve&iacute;culo de iodo &eacute; o principal recurso utilizado no mundo para a erradica&ccedil;&atilde;o das DDI, devendo ser utilizado de forma adequada e cautelosa (23).</p> 					    ]]></body>
<body><![CDATA[<p align="justify">No presente estudo as quantidades de iodo utilizadas na fortifica&ccedil;&atilde;o do sal estava adequada na maioria das amostras n&atilde;o havendo, portanto evid&ecirc;ncia de adultera&ccedil;&atilde;o da legisla&ccedil;&atilde;o, que preconizava a adi&ccedil;&atilde;o de 20 a 60  					mg de iodo/kg de sal. Estudos recentes tem discutido a necessidade de altera&ccedil;&atilde;o desta legisla&ccedil;&atilde;o para maior controle da sufici&ecirc;ncia de iodo, evitando assim sua insufici&ecirc;ncia ou excesso (24).</p> 					    <p align="justify">Apesar de encontrarmos v&aacute;rios estudos indicando o excesso de excre&ccedil;&atilde;o urin&aacute;ria de iodo (25,26,23,27), sua defici&ecirc;ncia ainda persiste em v&aacute;rias regi&otilde;es do mundo (28,23,29,30-34), ou em alguns grupos populacionais como, por exemplo, em vegetarianos e gestantes (35,36).</p> 					    <p align="justify"><b>CONCLUS&Atilde;O</b></p> 					    <p align="justify">Portanto, a preval&ecirc;ncia da defici&ecirc;ncia de iodo na popula&ccedil;&atilde;o estudada encontra-se em conformidade com a estabelecida pela Organiza&ccedil;&atilde;o Mundial de Sa&uacute;de. 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