Seidman D S, Ever-Hadani P, Stevenson D K, Slater P E, Harlap S, Gale R
Bikur Cholim Hospital, Jerusalem, Israel.
Obstet Gynecol. 1988 Aug;72(2):158-62.
We studied the longitudinal association of birth order and birth weight in two series of very large sibships, each consisting of at least seven children, and compared the findings with those based on analysis of cross-sectional data from a large population-based survey, the Jerusalem Perinatal Study. The birth weights of the cross-sectional sample were adjusted by multiple linear regression for a number of factors known to confound cross-sectional studies, including maternal age, education, marital status, religion, smoking, height and prepregnant weight, gestational age, and sex of the newborn. Birth weight increased with increasing birth order in both adjusted cross-sectional and socioeconomically homogeneous longitudinal data.
我们在两组非常大的同胞兄弟姐妹序列中研究了出生顺序与出生体重之间的纵向关联，每组至少有七个孩子，并将研究结果与基于一项大型人群调查——耶路撒冷围产期研究的横断面数据分析结果进行了比较。通过多元线性回归对横断面样本的出生体重进行了调整，以考虑一些已知会混淆横断面研究的因素，包括母亲年龄、教育程度、婚姻状况、宗教信仰、吸烟情况、身高和孕前体重、孕周以及新生儿性别。在调整后的横断面数据和社会经济状况均一的纵向数据中，出生体重均随出生顺序的增加而增加。
