Analyses were carried out via STATA

Analyses were carried out via STATA—9 (StataCorp LP, College Station, Tex.).
Descriptive statistics were means and standard deviations for continuous variables and
counts and proportions for categorical variables. Generalized linear models with a logistic
link were used to model the relationship between the predictor variables (history of
depression and demographic, psychopathological, functional, and psychosocial variables)
and depression outcome (an episode of incident major depression). Based on the logistic
models, the following epidemiological indicators of health effect were used to assess the
importance of each predictor variable as a risk indicator: exposure rate, incident risk ratio,
population attributable fraction, and number needed to treat