Xu B, Järvelin M R, Lü H, Xu X, Rimpelä A
Department of Public Health Science and General Practice, Oulu University, Finland.
Soc Biol. 1995 Fall-Winter;42(3-4):175-84. doi: 10.1080/19485565.1995.9988899.
This analysis examines the relationship between maternal determinants and birth weight in a population-based birth cohort of 5,284 mothers with singleton births of 28 completed gestational weeks in Qingdao, China, in 1992. Multiple linear regression models suggest that the length of the menstrual cycle, age at menarche, maternal weight, maternal height, parity, and number of antenatal visits had independent effects on birth weight after controlling for gestational age and sex of infant. The estimated difference in mean birth weight for each year after menarche was 11.7 g (95 per cent CI 4.6-18.8), and for each day of the menstrual cycle was 4.0 g (95 per cent CI, 2.1-6.0), after controlling for gestational age, sex of infant, maternal height, maternal weight, parity and the number of antenatal visits. No substantial differences in determinants of birth weight were found between the sexes. Maternal age, education, and occupation failed to reveal any significant association with birth weight. In sum, those women who reached menarche younger and had a relatively short menstrual cycle had a heavier baby on average, and the determinants of birth weight did not differ between male and female in the cohort.
本分析考察了1992年在中国青岛进行的一项基于人群的出生队列研究中5284名单胎妊娠且孕周满28周的母亲的母体决定因素与出生体重之间的关系。多元线性回归模型表明，在控制了婴儿的孕周和性别后，月经周期长度、初潮年龄、母亲体重、母亲身高、产次和产前检查次数对出生体重有独立影响。在控制了孕周、婴儿性别、母亲身高、母亲体重、产次和产前检查次数后，初潮后每一年平均出生体重的估计差异为11.7克（95%置信区间4.6 - 18.8），月经周期每延长一天平均出生体重的估计差异为4.0克（95%置信区间2.1 - 6.0）。在出生体重的决定因素方面未发现性别间的实质性差异。母亲年龄、教育程度和职业与出生体重未显示出任何显著关联。总之，初潮年龄较小且月经周期相对较短的女性平均产下的婴儿体重较重，并且该队列中出生体重的决定因素在男性和女性之间没有差异。
