Anderson A S, Whichelow M J
Hum Nutr Appl Nutr. 1985 Jun;39(3):202-7.
Forty women who complained of constipation during the third trimester of pregnancy completed 14-day weighed diet records and bowel function charts over a 4-week period. After 2 weeks of baseline observation the women were randomly allocated into three groups which were asked to take 10 g dietary fibre supplements per day in the form of either a corn-based biscuit (Group A), or as wheat bran (Gp B), or to continue without intervention (Gp C). Mean (+/- s.e.m.) daily dietary fibre intake in the first 2 weeks was similar to that in the general population, at 20.4 +/- 1.2 g, for the whole group, and 21.1 +/- 1.6 g for the 26 women who said they had already increased their dietary fibre intakes in attempts to relieve their symptoms. In the final 2 weeks changes in fibre intakes were: Gp A, mean increase 7.2 +/- 1.0 g per day (P less than 0.001); Gp B, mean increase 9.1 +/- 1.6 g per day (P less than 0.001); Gp C mean decrease 3.50 +/- 1.6 g per day (P less than 0.005). These changes were accompanied by an increase in the number of bowel movements and a change to a softer stool consistency in Gps A and B, with no changes in number of bowel movements or stool consistency in Gp C.
40名在妊娠晚期抱怨便秘的女性在4周内完成了14天的称重饮食记录和肠道功能图表。在进行2周的基线观察后，这些女性被随机分为三组，要求她们每天以玉米基饼干（A组）或麦麸（B组）的形式摄入10克膳食纤维补充剂，或者不进行干预（C组）。在前2周，整个组的平均（±标准误）每日膳食纤维摄入量与普通人群相似，为20.4±1.2克，而26名表示已尝试增加膳食纤维摄入量以缓解症状的女性的摄入量为21.1±1.6克。在最后2周，膳食纤维摄入量的变化为：A组，平均每天增加7.2±1.0克（P<0.001）；B组，平均每天增加9.1±1.6克（P<0.001）；C组平均每天减少3.50±1.6克（P<0.005）。这些变化伴随着A组和B组排便次数的增加以及粪便质地变软，而C组的排便次数和粪便质地没有变化。
