Influence of parental and biological factors on the male birth fraction in the United States: an analysis of birth certificate data from 1964 through 1988
Influence of parental and biological factors on the male birth fraction in the United States: an analysis of birth certificate data from 1964 through 1988
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DOI：
10.1016/s0015-0282(99)00576-2
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发表时间：
2000-03-01
影响因子：
6.7
通讯作者：
Schnatter, AR
中科院分区：
文献类型：
--
作者：
Nicolich, MJ;Huebner, WW;Schnatter, AR
目的：确定1964年至1988年父母和生物因素对美国男性出生率的作用。设计：按种族组对美国每年男性出生率进行逻辑回归。设置：基于人口的数据。患者：1964年至1988年美国活产婴儿。干预：无。主要结果测量：结果：在研究期间，美国每年的男性出生分数显示出基于种族群体、父母年龄和低出生体重的变化。父母年龄对美国男性出生率的总体影响很大，非白人的影响比白人的影响更大。美国男性出生比例也受到非白人低出生体重儿比例的强烈影响，但白人则不然。男性出生分数随着父母一方年龄的增加和低出生体重儿百分比的增加而下降。结论：对美国男性出生分数影响的相对大小取决于种族群体，这可能反映了观察数据的范围，而不是生物学差异。所开发的模型具有合理的预测能力，是了解影响男性出生率因素的适当的第一步。这些类型的父母和生物变量应包括在模型之前，检查其他外源和人口水平的变量。(C)2000年，美国生殖医学会。
Objective: To determine the role of parental and biological factors on the U.S. male birth fraction from 1964 through 1988.Design: Logistic regression on annual U.S. male births by race group.Setting: Population-based data.Patient(s): Live births in the United States 1964 through 1988.Intervention(s): None.Main Outcome Measure(s): Annual U.S. male birth fraction by parental and biological factors.Result(s): During the study period, the annual U.S. male birth fraction showed changes based on race group, parental age, and low birth weight. The overall influence of parental age on the U.S. male birth fraction is strong and is stronger in nonwhites than in whites. The U.S. male birth fraction is also strongly influenced by the percentage of low birth weight infants in nonwhites, but not in whites. The male birth fraction declines with increasing age of either parent and with an increase in the percentage of low birth weight infants.Conclusion(s): The relative magnitude of influences on the U.S. male birth fraction depend on the race group, which may be a reflection of the range of observed data rather than biological differences. The developed models have reasonable predictive power and are an appropriate first step in understanding the factors influencing the male birth fi-action. These types of parental and biological variables should be included in models before examining other exogenous and population level variables. (C) 2000 by American Society for Reproductive Medicine.