This cohort study investigated the effect of early life nutrition on later performance in developmental milestones and cognitive tests. Structural equation modelling was carried out on follow-up data from a national birth cohort of 5362 children born in 1 week of 1946 in Britain. Children who were breastfed longer showed earlier developmental milestones. After adjusting for sex, social group an...

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Objective : Infertility is the inability of a couple to conceive after one and half year of unprotected sex.Infertility is an inability of a person to reproduce, in its normal state or condition. Male infertility is considered as a major problem all over the world. The aim of this study was to investigate the association of the CYP1A1 polymorphisms with idiopathic non-obstructive azoospermia in...

This article presents a biosocial model of fertility decline, which integrates ecological-economic and informational-cultural hypotheses of fertility transition in a unified theoretical framework. The model is then applied to empirical data collected among 500 women from San Borja, Bolivia, a population undergoing fertility transition. Using a combination of event history analysis, multiple reg...

OBJECTIVES To use simple measures of laterality and hand control that can identify a greater risk of poorer scholastic ability, potentially signalling suboptimal hemispheric lateralisation. DESIGN Analysis of material from a birth cohort study. SETTING Members of the National Child Development Study, a British birth cohort study following people born in 1958. PARTICIPANTS 10 612 children ...

BACKGROUND Critical to conducting high quality research is the ability to attract and retain participants, especially for longitudinal studies. Understanding participant experiences and motivators or barriers to participating in clinical research is crucial. There are limited data on healthy participant experiences in longitudinal research, particularly in low- and middle-income countries. This...

OBJECTIVE To study the temporal relationship between socioeconomic disadvantage and onset of chronic disabling conditions in childhood. METHOD Using parent reported data from the Longitudinal Study of Australian Children, we compared children who developed a chronic disabling condition between the ages of 6/7 and 10/11 years with children without a chronic disabling condition at either age. L...

OBJECTIVE To investigate access to a Universal Health Home Visit program for families of Aboriginal and non-Aboriginal infants and the effect of a one-off home visit on subsequent health service utilisation. METHODS A case-control study was undertaken drawing 175 Aboriginal infants from an Aboriginal birth cohort study and 352 matched non-Aboriginal infants. A structured file audit extracted ...

This study examined the association between exposure to unemployment and suicidal behaviors (suicidal ideation and attempted suicide) in a birth cohort of New Zealand young adults using fixed-effects logistic and Poisson regression models. Data were gathered on unemployment and suicidal behaviors at annual periods from ages 16-25 years. At all ages increasing exposure to unemployment was associ...

OBJECTIVE Studies have shown that children growing up in socio-economically disadvantaged families have poorer cognitive scores than children growing up in more advantaged families, and that high-quality childcare services can reduce this gap. This effect may be attenuated, however, if disadvantaged families are less likely than better-off families to use childcare and if they use childcare of ...