Pub. date: 2008 | Online Pub. Date: April 21, 2008 | DOI: 10.4135/9781412963855 | Print ISBN: 9781412941860 | Online ISBN: 9781412963855| Publisher:SAGE Publications, Inc.About this encyclopedia
Constance W. Liu
A birth cohort is defined as a group of individuals born at or around the same time. These cohorts are defined in studies to examine the impact of genera-tion-specific factors that influence members of these cohorts. Differences in disease incidence are due to either exposures common to the birth cohort (e.g., early childhood disease that confers later immunity to diseases such as tuberculosis), the influence of early nurture ...