Table 2.

Risk thresholds for the selective intervention.

Behaviour	Threshold for ‘at risk’
Alcohol use	Consumed a full standard alcoholic drink in the past 6 months
Smoking	Have tried cigarette smoking (even a puff or two) in the past 6 months
Physical activity	Engaging in 60 min of MVPA on 0, 1 or 2 days/week
Sedentary recreational screen time	>4 hours/day of sedentary recreational screen time
Sleep duration	<7 or >12 hours of sleep/night on school nights if 6–13 years of age
	OR
	<7 or >11 hours of sleep/night on school nights if 14–17 years of age
Diet	5–6 cups/week OR 1 or more cups/day of sugar-sweetened beverages
	OR
	Two or more of the following:
	<2 servings of fruit/day
	<5 serves of vegetables/day
	>1 serve of discretionary food items/day

Students are offered the selective intervention when they meet the above criteria for two of more behaviours at the 12-month and/or 24-month follow-up assessment.

MVPA, moderate-to-vigorous physical activity.