Table 1.

Percentage (%) of variance explained at the student, school and study site levels for several anthropometric and lifestyle traits in 6022 9–11 year old children from the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE).

	Study Site (Level 3)	School (Level 2)	Student (Level 1)
BMI	4.8	3.3	91.9
Waist Circumference (WC)	3.2	3.4	93.5
Healthy Diet Score (HDS)	7.8	3.9	88.3
Unhealthy Diet Score (UDS)	24.9	8.9	66.2
Sleep Duration	17.1	7.7	75.3
MVPA	9.8	17.6	72.5
Sedentary Time (ST)	14.1	9.0	76.9
In-School MVPA	16.3	29.8	53.8
In-School Sedentary Time	54.2	20.7	25.1

BMI: body mass index; MVPA: moderate-to-vigorous physical activity.