Simondon K B, Costes R, Delaunay V, Diallo A, Simondon F
Institut de Recherche pour le Développement, Nutrition Unit, Montpellier, France.
Int J Epidemiol. 2001 Jun;30(3):476-81. doi: 10.1093/ije/30.3.476.
In many developing countries, breastfed children have a lower nutritional status than those weaned from 12 months of age. Reverse causality, that is, earlier weaning of healthy and well-nourished children, is a possible explanation.
Maternal reasons for early and late weaning were investigated in a cohort of 485 rural Senegalese children using structured interviews during two rounds at the ages of 18--28 and 23--33 months, respectively. Length, weight and height were assessed, and dates of weaning were monitored.
The mean duration of breastfeeding was 24.1 months (quartiles 21.9 and 26.3). Two-thirds of mothers of breastfed children under 2 stated that they would wean at the age of 2, while for breastfed children aged 2 years, a 'tall and strong' child was the most prevalent criterion. The main reasons for weaning prior to 2 years (N = 244) were that the child ate well from the family plate (60%), that the child was 'tall and strong' (46%) and maternal pregnancy (35%). The main reasons for weaning later than the age of 2 were: a 'little, weak' child (33%), food shortage (25%), illness of the child (24%) and refusal of family food (14%, N = 120). Children breastfed above the age of 2 because they were 'small and weak' had lower mean height-for-age and a greater prevalence of stunting than children breastfed late for other reasons (P < 0.0001).
The habit of postponing weaning of stunted children very likely explains why breastfed children have lower height-for-age than weaned children in this setting.
在许多发展中国家,母乳喂养儿童的营养状况低于12个月龄断奶的儿童。反向因果关系,即健康且营养良好的儿童更早断奶,是一种可能的解释。
在塞内加尔农村的485名儿童队列中,分别在18 - 28个月和23 - 33个月这两个年龄段进行两轮结构化访谈,调查母亲早断奶和晚断奶的原因。评估身长、体重和身高,并监测断奶日期。
母乳喂养的平均时长为24.1个月(四分位数为21.9和26.3)。2岁以下母乳喂养儿童的母亲中有三分之二表示她们会在孩子2岁时断奶,而对于2岁的母乳喂养儿童,“高大强壮”是最普遍的断奶标准。2岁前断奶(N = 244)的主要原因是孩子能很好地吃家庭食物(60%)、孩子“高大强壮”(46%)和母亲怀孕(35%)。2岁后断奶的主要原因是:孩子“瘦小虚弱”(33%)、食物短缺(25%)、孩子生病(24%)和拒绝吃家庭食物(14%,N = 120)。因“瘦小虚弱”在2岁以上仍母乳喂养的儿童,其年龄别身高均值低于因其他原因晚断奶的儿童,且发育迟缓的患病率更高(P < 0.0001)。
发育迟缓儿童推迟断奶的习惯很可能解释了在这种情况下母乳喂养儿童的年龄别身高低于断奶儿童的原因。