Greene G W, Smiciklas-Wright H, Scholl T O, Karp R J
Nutrition Program, Penn State University, University Park.
Obstet Gynecol. 1988 May;71(5):701-7.
In a large sample (N = 7116) of women who had two pregnancies within six years, the 50th percentile of weight gain between pregnancies was 2 lb (0.9 kg). Weight gain in pregnancy, week of registration, cigarette smoking, race, percent of ideal body weight, complications of pregnancy, and marital status in the first pregnancy, as well as breast-feeding in the hospital and interval between the two pregnancies, correlated significantly with interpregnancy weight change, and explained 24% of the variance (P less than .0001). Weight gain in the first pregnancy alone explained 21% of the variance in weight change between pregnancies. After adjustment for the effects of other variables on weight change, weight gains in pregnancy of 20 lb (9.1 kg) or more were statistically significant (P less than .05); the more weight a woman gained above 20 lb (9.1 kg), the more she retained by the start of her next pregnancy.
在一个包含7116名在六年内经历两次怀孕的女性的大样本中，两次怀孕之间体重增加的第50百分位数为2磅（0.9千克）。孕期体重增加、登记孕周、吸烟情况、种族、理想体重百分比、首次怀孕时的妊娠并发症及婚姻状况，以及住院期间的母乳喂养情况和两次怀孕之间的间隔时间，均与两次怀孕之间的体重变化显著相关，并解释了24%的方差（P<0.0001）。仅首次怀孕时的体重增加就解释了两次怀孕之间体重变化21%的方差。在调整了其他变量对体重变化的影响后，孕期体重增加20磅（9.1千克）或更多具有统计学意义（P<0.05）；女性在超过20磅（9.1千克）基础上增加的体重越多，到下次怀孕开始时保留的体重就越多。
