Instituto de Medicina Integral Prof. Fernando Figueira, Recife, PE, Brasil.
Rev Saude Publica. 2010 Apr;44(2):240-8. doi: 10.1590/s0034-89102010000200003.
To analyze time trends in the duration of exclusive breastfeeding and associated protection factors.
Prevalances for total breastfeeding and exclusive breastfeeding in a population of four-month-old infants were analyzed. Data were obtained from population surveys carried out in 1991, 1997, and 2006, with 935, 2081, and 1568 infants respectively. The data were retrieved from interviews answered by parents or guardians. The prevalences were analyzed by Poisson regression in regard to: environmental, behavioral and socioeconomic conditions, maternal variables, and biological factors of infant.
The median duration of total breastfeeding rose from 89 days (1991) to 106 days (1997), and finally to 183 days (2006). The median duration of exclusive breastfeeding remained around 30 days between 1997 and 2006. In the multivariate analysis, from the ten variables studied, only maternal schooling and age, address, and female gender of infant were maintained in the final explanatory model.
Despite the significant increase in terms of total breastfeeding duration, the same did not occur with the duration of exclusive breastfeeding.
分析纯母乳喂养持续时间的变化趋势及其相关保护因素。
分析四个月大婴儿的总母乳喂养率和纯母乳喂养率。通过对 1991 年、1997 年和 2006 年进行的三次人口调查，共获得 935、2081 和 1568 名婴儿的数据。数据来自于父母或监护人的访谈。采用泊松回归分析环境、行为和社会经济条件、产妇变量和婴儿的生物学因素对母乳喂养的影响。
总母乳喂养时间中位数从 89 天（1991 年）增加到 106 天（1997 年），最后增加到 183 天（2006 年）。1997 年至 2006 年间，纯母乳喂养时间中位数保持在 30 天左右。在多变量分析中，在所研究的十个变量中，只有母亲的教育程度和年龄、住址以及婴儿的性别在最终的解释模型中得以保留。
尽管母乳喂养总时间显著增加，但纯母乳喂养时间并没有相应增加。
