Factors

Studies (n)

95% CI

P value

Region

0.1317

Northwest

3

0.4587 [0.0473; 0.9354]

Southwestern

6

0.1809 [0.0829; 0.3506]

Southeastern

5

0.2209 [0.0786; 0.4851]

South-south

2

0.3296 [0.1324; 0.6129]

Multi-region

2

0.3182 [0.0035; 0.9842]

Type of student

0.4349

General

5

0.3163 [0.1308; 0.5872]

Health

13

0.2398 [0.1468; 0.3663]