OBJECTIVES To develop a hypothesis about the carcinogenesis of cervical cancer from a descriptive analysis. METHODS The mortality data of cervical cancer were analyzed over the period from 1974 to 1992 among Taiwanese women using a log-linear Poisson model modified from the method of Osmond and Gardner to examine the effects of age, calendar period of death, and birth cohort on cervical cance...

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 ...

This article examines the development of the educational and vocational careers of 1257 subjects born between 1961 and 1969 as a function of economic circumstances in the Netherlands during the eighties. Subjects were expected to attend school longer in times of recession, to have a higher level of education, while getting a suitable, high-quality job (in terms of number of hours, appointment t...