Table 1.

Methodological characteristics of the reviewed studies (N = 32).

Methodological criterion	Description	n of studies	(%)
Study design	Longitudinal study	6	18.8
	Cross-sectional study	26	81.2
Sample size	Large (>500)	15	46.8
	Medium (>100 and <500)	14	43.8
	Small (<100)	3	9.4
Data collection method/data	National level	5	15.6
source	State/territory-level	2	6.3
	Community/school-level	20	62.5
	Agency administrative data	5	15.6
Data analysis	More advanced statistics	4	12.5
	Regression/analysis of covariance	27	84.4
	Bivariate statistics	1	3.1
Measurement of mental health	Reliability tested/reported	11	34.4
problem/need	Validity tested/reported	8	25
Measurement of	Reliability tested/reported	12	37.5
barriers/facilitators	Validity tested/reported	7	21.9
Theoretical framework	Reported	9	28.1
	Not reported	23	71.9