Characteristics of the five participant groups including age, sex, BMI, personality aspects and current levels of life stress and distress.

(Values are group means and standard deviations in parenthesis, n = 20 per group). BMI = body mass index; PSQ = Perceived Stress Questionnaire; K10 = Kessler 10. *A p-value was obtained by comparing the combined mean of the two medical student groups to that of the younger control group.