Estado nutricional de gestantes avaliado por três diferentes métodos de classifica？？o antropométrica

objective: this study assessed the nutritional status of pregnant women by three different methods. methods: a cross sectional study was conducted between january and june 2006 with 992 pregnant women attending a public prenatal care facility. nutritional status was classified according to different assessment methods (rosso nomogram, atalah method and the latin american center for perinatology gestogram). the results were compared with the nutritional status of nonpregnant women in childbearing age in the brazilian northeast and all of brazil. the differences were analyzed by the chi-square goodness of fit test, with a significance level of 5%. results: low weight of pregnant women according to the rosso nomogram was the condition that most contributed to the difference (p<0.001). according to the atalah method, extreme differences were also observed in the prevalences of underweight pregnant women both in the northeast and in all of brazil. in relation to the gestogram of the perinatology latin american center, the greatest prevalence differences also occurred among the underweight: 18% versus 7.4% for the northeast region and 18% versus 6.7% for brazil, although this was the assessment method that came closest to the results of the population being compared. conclusion: nutritional status distribution of pregnant women, assessed by three methods, was different from the nutritional status distribution of the nonpregnant population, both regionally and domestically, especially according to rosso's nomogram, demonstrating the limited use of these instruments. assessment by the perinatology latin american center comes closest to the nutritional status distribution of nonpregnant women.