Table 1. Baseline characteristics.

Baseline variables	Category or range	n	Per cent
Gender	Female	1577	42.0
	Male	2177	58.0
School performance	Poor	340	9.1
	Good	3414	90.9
Student classification	High school students	1606	42.8
	University students	2148	57.2
Prestigious school	No	1906	50.8
	Yes	1848	49.2

n, number of participants surveyed.