This study evaluated the effects of seasonal weather at time of birth and ambient temperature during the first six months of life on hospitalizations due to asthma and pneumonia in preschool children and on diagnosis of asthma in adulthood among individuals from the 1982 birth cohort in Pelotas, Rio Grande do Sul, Brazil. The cohort included 5,914 live births, of which 77% were followed up unti...

The aim of this study was to evaluate the association between size at birth (birthweight and birth length) and height in early adolescence in a prospective birth cohort study in Pelotas, Rio Grande do Sul, Brazil. Interviews were carried out in 1993, including measurements of birthweight and length, and in 2004-2005, including measurements of weight and height. This analysis includes 4,452 indi...

This paper documents an increasing intergenerational income persistence in China since economic reforms were introduced 1979. The elasticity increases from 0.390 for the 1970–1980 birth cohort to 0.442 1981–1988 cohort; this increase is more evident among urban and coastal residents than rural inland residents. We also explore how changes correlated with market reforms, development, policy chan...

The records of the Phenylketonuria Register were examined to determine the factors associated with early intellectual progress in children who had received a diet low in phenylalanine from soon after birth. A total of 1031 children were born between 1964 and 1980 and started treatment before they were 4 months of age, and 808 of them were followed up prospectively. In 263 children born between ...

OBJECTIVE To estimate the contributions of biological aging, historical trends, and birth cohort effects on trends in pre-eclampsia in the United States. DESIGN Population based retrospective study. SETTING National hospital discharge survey datasets, 1980-2010, United States. PARTICIPANTS 120 million women admitted to hospital for delivery. MAIN OUTCOME MEASURES Temporal changes in rat...

BACKGROUND The current lifetable approach to survival estimation is favoured by CF registries. Recognising the limitation of this approach, we examined the utility of a parametric survival model to project birth cohort survival estimates beyond the follow-up period, where short duration of follow-up meant median survival estimates were indeterminable. METHODS Parametric models were fitted to ...

background: there is an upward trend for parents to resort to assisted reproductive technology (art) treatment due to delayed childbirth or birth difficulties. objective: this study investigates the pregnancy health and birth outcomes of women who underwent art and analyzes the factors that influence birth weight to become<10 percentile when undergoing art. materials and methods: this study ana...

This paper investigates the association between family poverty, the level of deprivation in electoral wards and children's cognitive test scores using data from the second generation in the 1991 sweep of the British National Child Development Study (1958 birth cohort). Family poverty has a significant association with lower test scores in children of all ages (4-18 years). Neighbourhood poverty...

OBJECTIVES To assess inconsistencies in reported age at first sex (AFS) and age at first marriage (AFM) in three African cohorts, and consider their implications for interpreting trends in sexual and marital debut. METHODS Data were analysed from population-based cohort studies in Zimbabwe, Uganda and South Africa with 3, 10 and 4 behavioural survey rounds, respectively. Three rounds over a s...