Table 3.

Period prevalence rates of participants by age group

	Boys			Girls			All
	(n = 273)			(n = 298)			(n= 571)
Age group (years)	10–13	14–16	17 –19	10–13	14 –16	17–19	10–13	14–16	17–19
Period prevalence (%)
Lifetime	55.5	60.7	60.7	48.2	60.6	70.2	51.8	60.7	64.8
12-month	39.1	44.1	52.5	37.7	43.1	59.6	38.4	43.5	55.6
One-month	22.7	24.5	29.5	21.9	23.4	44.7	22.3	23.8	36.1
Point	6.4	15.6	21.3	14.1	13.1	27.7	10.7	14.1	24.1