The complex ethical issues involved in conducting a birth cohort study, especially in low-income populations, must be carefully considered.
C.-C. Wu et al. conducted a longitudinal birth cohort study of six years of follow-up recruiting more than five hundred children to explore the interactive influences of gender, GSTM1 genotypes, and prenatal tobacco smoke exposure in asthma development.
Wickman et al. (2003) conducted a population-based birth cohort study of 4,089 children in Stockholm, where they reported an increased risk of asthma among children in damp home environments during the first 2 years of life compared with unexposed with an adjusted OR of 1.75 (95% CI, 1.26 2.43).
The benefit of the ALCANLink methodology to conduct a longitudinal birth cohort linkage study is reflected in the manageable population representative and standardized PRAMS sample methodology utilized.
Women, both young and old, cite their lack of trust in the CMWs' abilities to conduct a safe birth as a key reason for not seeking their care.
To evaluate whether the observed associations were mediated by girl's birth weight, we conducted a secondary analysis including child birth weight.
To test this hypothesis we conducted a trial among low birth weight neonates (LBW; <2,500 g), who normally do not receive BCG vaccine at birth, but only when they have gained weight.
We conducted a joint prospective, longitudinal birth cohort study in Finland (Turku University Hospital) and Denmark (National University Hospital at Copenhagen) from 1997 to 2001.
To address this concern we conducted a supplementary analysis of birth certificate data for all women who delivered preterm infants at the hospitals where women were recruited, during the same time period active recruitment occurred.
