The Validation of Longitudinal Studies: The Case of the Ontario Longitudinal Study of Aging (LSA).

Abstract

Longitudinal studies are examined with special reference to the Ontario Longitudinal Study of Aging (LSA). The specific aspects discussed are the representativeness of the sample, attrition rates, end-points, and associations, particularly the associations with age. It is concluded that, in comparison with other longitudinal studies, both in Canada and the U.S., the LSA represents a good source of longitudinal data and therefore lends itself to analyses which may be used to investigate factors expected to be important in understanding various aspects of the aging process.