Differences in frequency, total time, total volume and energy expenditure of conditioning leisure-time physical activity between unimpaired preterm-born VLBW (n = 90) and term-born control (n = 98) young adults obtained by linear regression.

VLBW = very low birth weight (Model 4: adjusted for age, sex, body mass index, daily smoking, highest education of either parent, extraversion, openness to experience, neuroticism, agreeableness, and conscientiousness (for Models 1, 2 and 3, see Table 3).aMET×hours of physical activity/year (MET = metabolic equivalents; ratio of metabolic rate during exercise and estimated metabolic rate at rest; 1 MET corresponds energy expenditure of approximately 1 kcal/kg×hour).bWomen = 0; Men = 1.cPdHighest education of either parent; Elementary = 1; High school = 2; Intermediate = 3; University = 4.Adjusted for covariates of Table 3 plus personality characteristics, with the association of each covariate shown.