Iron supplementation among pregnant women: results from a population-based survey study.

Objectives: To measure the prevalence and risk factors associated with iron supplementation among pregnant women in the municipality of Rio Grande, Southern Brazil.

Methods: All mothers living in this municipality who had children in 2007 were surveyed for demographic, socioeconomic and health care received during pregnancy and childbirth. The statistical analysis consisted of Poisson regression with robust adjustment of variance, and the measure of effect was prevalence ratio (PR).

[Self-reported hypertension: validation in a representative cross-sectional survey].

To assess the validity of self-reported hypertension, a population-based cross-sectional study was carried out in Pelotas, Southern Brazil. Individuals aged 20 years were selected through probabilistic two-stage sampling. All 2,949 participants had their blood pressure measured twice (5 minutes apart) during a household visit.