Gender, n (%)

Male

Female

218 (44.2)

275^b (55.8)

School year, n (%)

First

Second

Third

Fourth

103 (21.1)

152^b (31.2)

113 (23.2)

119 (24.4)

Ethnicity, n (%)

Native

Western

Non-Western

334 (68.2)

32 (6.5)

124 (25.3)

Status score, n (%)

Low

Medium

High

89 (18.3)

339 (69.6)

59 (12.1)

Age, mean (SD), range

In years

15.05 (1.26) 12.3 - 18.5

Medical absenteeism, mean (SD), range

In total number of days

8.4 (6.60) 1 - 45