The changing timing of births in Iran: an explanation of the rise and fall in fertility after the 1979 Islamic Revolution [0.03%]
伊朗生育时间的变化：1979年伊斯兰革命后生育率变化的解释
Amir Erfani,Kevin McQuillan
Amir Erfani
Studies exploring the course of period fertility in Iran after the 1979 Islamic Revolution have not examined systematically the role played by changes in the timing of births. Using retrospective data from the 2000 Iran Demographic and Heal...
Understanding the complexity of ambivalence toward pregnancy: does it predict inconsistent use of contraception? [0.03%]
理解怀孕矛盾情绪的复杂性：它能预测避孕措施使用的不一致性吗？
Sam Hyun Yoo,Karen Benjamin Guzzo,Sarah R Hayford
Sam Hyun Yoo
Ambivalence towards future pregnancy is common and may increase the risk of unprotected sex and unintended pregnancy. We propose that ambivalent attitudes toward pregnancy consist of subtypes that are differentially associated with contrace...
Validation of blood-based assays using dried blood spots for use in large population studies [0.03%]
基于干燥血斑鉴定适用于大规模人群研究的血液检测方法
Eileen Crimmins,Jung Ki Kim,Heather McCreath et al.
Eileen Crimmins et al.
Assessment of health in large population studies has increasingly incorporated measures of blood-based biomarkers based on the use of dried blood spots (DBS). The validity of DBS assessments made by labs used by large studies is addressed b...
Yang Claire Yang,Ting Li,Steven M Frenk
Yang Claire Yang
The growing evidence linking social connectedness and chronic diseases such as cancer calls for a better understanding of the underlying biophysiological mechanisms. This study assessed the associations between social network ties and multi...
Enhancing the gene-environment interaction framework through a quasi-experimental research design: evidence from differential responses to September 11 [0.03%]
通过准实验研究设计增强基因-环境相互作用框架：9·11事件不同反应的证据支持
Jason M Fletcher
Jason M Fletcher
This article uses a gene-environment interaction framework to examine the differential responses to an objective external stressor based on genetic variation in the production of depressive symptoms. This article advances the literature by ...
The reproductive transition in an indigenous population of northern Argentina [0.03%]
阿根廷北部一个土著群体的生殖过渡
Norberto Lanza,Claudia Valeggia,Enrique Peláez
Norberto Lanza
Latin America has been registering a fast decrease in fertility rates since the mid-twentieth century. This change can be linked to the modernization process these populations have been undergoing. However, research with Latin American indi...
Are stepparents always evil? Parental death, remarriage, and child survival in demographically saturated Krummhörn (1720-1859) and expanding Québec (1670-1750) [0.03%]
继父都是坏人吗？克伦霍恩(1720-1859年)和魁北克(1670-1750年)两地人口饱和状态下父母去世后的再婚与儿童存活率研究
Kai P Willführ,Alain Gagnon
Kai P Willführ
Parental death precipitates a cascade of events leading to more or less detrimental exposures, from the sudden and dramatic interruption of parental care to cohabitation with stepparents and siblings in a recomposed family. This article com...
Influenza as a proportion of pneumonia mortality: United States, 1959-2009 [0.03%]
1959-2009年美国流感在肺炎死亡中的占比
Andrew Noymer,Ann M Nguyen
Andrew Noymer
As causes of death, influenza and pneumonia are typically analyzed together. We quantify influenza's contribution to the combined pneumonia and influenza mortality time series for the United States, 1959-2009. A key statistic is I/(P + I), ...
Understanding how family socioeconomic status mediates the maternal intelligence-child cognitive outcomes relationship: a moderated mediation analysis [0.03%]
家庭社会经济地位如何影响母亲智力与子女认知结果之间的关系及调节效应分析
D Diego Torres
D Diego Torres
In a model of moderated mediation using matched data from the 1979 National Longitudinal Survey of Youth and the 1979 National Longitudinal Survey of Youth, Children and Young Adults, I test (1) whether family socioeconomic status (SES) med...
Income gains and very low-weight birth among low-income black mothers in California [0.03%]
加利福尼亚州低收入黑人妇女的收入增长与极低体重出生儿的关系
Tim A Bruckner,David H Rehkopf,Ralph A Catalano
Tim A Bruckner
We test the hypothesis suggested in the literature that an acute income gain in the form of the earned income tax credit reduces the odds of a very low-weight birth among low-income non-Hispanic black mothers. We apply ecological time serie...