TABLE 1.

Characterization of participants in S1 according to five age groups and gender.

	Gender
	Female participants (N = 351)			Male participants (N = 266)
Age groups (years)	Total	Mean	SD	Total	Mean	SD
11–12	29	11.93	0.25	17	12	0.00
13–14	83	13.39	0.50	87	13.55	0.50
15–16	81	15.36	0.48	61	15.39	0.49
17–18	68	17.4	0.50	42	17.33	0.47
19–55	90	22.81	5.71	59	24.86	7.88