Monteiro C A, Zũniga H P, Benicio M H, Rea M F, Tudisco E S, Sigulem D M
Am J Public Health. 1987 Aug;77(8):964-6. doi: 10.2105/ajph.77.8.964.
A random sampling of children under age five in Sao Paulo, Brazil, 1984/85, disclosed the median duration of breast-feeding to be 3.5 months and the duration of exclusive breast-feeding, 2.0 months. A comparison of these figures with those of a similar survey carried out in the same city in 1973/74 revealed a substantial increase in both the frequency and duration of breast-feeding. The trend was evident in all socioeconomic strata but most marked among women from higher income and educational levels.
1984/85年在巴西圣保罗对5岁以下儿童进行的随机抽样显示,母乳喂养的中位数时长为3.5个月,纯母乳喂养的时长为2.0个月。将这些数据与1973/74年在同一城市进行的类似调查的数据相比较,发现母乳喂养的频率和时长都有大幅增加。这一趋势在所有社会经济阶层都很明显,但在收入和教育水平较高的女性中最为显著。