BACKGROUND Maternal labor force participation has increased dramatically over the last 40 years, yet surprisingly little is known about longitudinal patterns of maternal labor force participation in the years after a birth, or how these patterns vary by education. OBJECTIVE We document variation by maternal education in mothers' labor force participation (timing, intensity, non-standard work,...

Large-scale population-based birth cohorts, which recruit women during pregnancy or at birth and follow up their offspring through infancy and into childhood and adolescence, provide the opportunity to monitor and model early life exposures in relation to developmental characteristics and later life outcomes. However, due to confounding and other limitations, identification of causal risk facto...

Knowledge of determinants of change in diet quality is needed, but it is relatively limited to date and mostly available from cross-sectional studies. We investigated longitudinal change in diet quality and its associations with period of birth (birth cohort) and socio-demographic and lifestyle characteristics. We used dietary intake data collected by FFQ in 1992, 1996, and 2007 from a populati...

objective: depressed coronary artery disease (cad) patients may experience a poorer prognosis than non-depressed patients. the aim of this study was to find the associated factors for depressive symptoms in young adults with cad. method: this was a cross-sectional study within tehran heart center's premature coronary atherosclerosis cohort (thc-pac) study. young adult cad patients (men ≤ 45 yea...

background although current data shows a positive association between obesity and development of coronary heart disease (chd) in general population, there is limited data on the important protective role of central or general obesity in patients with prevalent chd or the “obesity paradox”, from this region. conclusions results of this study demonstrated an apparently protective effect for overw...

background: coffee is implicated in the susceptibility to several cancers. however, the association between coffee and lymphoma remains unclear. this meta-analysis aimed to assess quantitatively the association between coffee and the incidence of lymphoma. methods: a literature search was performed for cohort and case-control studies published using pubmed, cochrane, and embase databases. studi...

BACKGROUND Genetics and early environment are known to influence height, but evidence is sparse on changes in these influences over time. METHODS The 1958 British birth cohort study includes all children born between March 3, 1958 and March 9, 1958, who were followed to age 41 yr, and one-third of their offspring in 1991. Childhood height in each generation (measured at 7 yr for cohort member...

The aim of this study was to verify the agreement between different approaches for estimating levels of physical activity in adolescents. One questionnaire was administered to parents and two were administered to the adolescents. This was a cross-sectional analysis of data collected in the 2004-2005 follow-up of the 1993 Pelotas (Brazil) birth cohort study. Parents or guardians answered the fol...

Population-based, prospective longitudinal cohort studies are considering the issues surrounding returning findings to individuals as a result of genomic and other medical research studies. While guidance is being developed for clinical settings, the process is less clear for those conducting longitudinal research. This paper discusses work conducted on behalf of The UK Cohort and Longitudinal ...