Data for this investigation were derived from baseline and first annual follow-up examinations of a longitudinal cohort of individuals participating in a weight gain prevention study. Participants were 198 men and 529 high-income women recruited through media advertisements and 332 low-income women recruited primarily through the special Supplemental Nutrition Program for Women, Infants, and Children (WIC). Those included in the present analyses (1) were 20 to 45 years of age, (2) were in good health, (3) were not pregnant in the year prior to or following study enrollment, and 4) attended both baseline and follow-up examinations. Subsequent to baseline assessment, half of the participants were randomly assigned to one of two low intensity intervention groups designed to reduce weight gain, and half were assigned to a no-contact control condition. The present study was unrelated to the purposes of the intervention trial and thus treated intervention assignment simply as a covariate in analyses.