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Table 4 Area under the curves for each lifestyle risk index and causes of adolescent disease burden in the 2013–2014 Australian Child and Adolescent Survey of Mental Health and Wellbeing (n = 2314)

From: Lifestyle risk indices in adolescence and their relationships to adolescent disease burden: findings from an Australian national survey

  Risk indices
  Basic risk AUC (95% CI) Basic risk + BMI AUC (95% CI) Basic risk + Sleep AUC (95% CI) Basic risk + Smoking AUC (95% CI) Basic risk + BMI + Sleep AUC (95% CI) Basic risk + BMI + Smoking AUC (95% CI) Basic risk + Sleep + Smoking AUC (95% CI) Basic risk + BMI + Sleep + Smoking AUC (95% CI)
Major depression 0.706 (0.671–0.742) 0.702 (0.667–0.736) 0.753 (0.718–0.787) c 0.713 (0.678–0.748) 0.739 (0.705–0.773) c 0.709 (0.675–0.743) 0.757 (0.723–0.791) c 0.743 (0.709–0.776) c
Self-harm 0.717 (0.684–0.751) 0.710 (0.677–0.743) 0.743 (0.711–0.776) b 0.723 (0.690–0.757) 0.729 (0.697–0.762) 0.717 (0.684–0.750) 0.747 (0.715–0.780) b 0.736 (0.703–0.768) a
Suicide attempt 0.765 (0.708–0.823) 0.766 (0.708–0.824) 0.826 (0.777–0.875) c 0.791 (0.736–0.847) a 0.820 (0.775–0.864) c 0.798 (0.742–0.855) a 0.838 (0.793–0.884) c 0.836 (0.793–0.880) c
Severe psychological distress 0.701 (0.655–0.747) 0.693 (0.649–0.738) 0.759 (0.717–0.802) c 0.709 (0.663–0.754) 0.737 (0.694–0.779) b 0.701 (0.656–0.747) 0.768 (0.727–0.810) c 0.743 (0.702–0.785) b
  1. acontrast with basic risk index p < 0.05; b contrast with basic risk index p < 0.01; c contrast with basic risk index p < 0.001
  2. NB: Risky alcohol use defined as 4 or more standard drinks in past 30 days; illicit drug use risk defined as any drug use in past 30 days; unprotected sex risk defined as no protection against pregnancy of sexually transmitted diseases the last time the respondent had sexual intercourse; BMI (body mass index) risk defined as less than 18.5 or greater than 30; sleep risk defined as less than 7 hours per day or more than 11 hours per day on average; smoking risk defined as cigarette smoking in the past 30 days