n (%) or mean ± s.d

Female sex

325 (53.8)

Age

11.8 ± 3.6

<8 years

120 (19.9)

8 - 11.9 years

141 (23.4)

12 - 15.9 years

220 (36.5)

>16 years

122 (20.2)

Adolescents

308 (51)

Migration

67 (11)

Siblings

4 ± 1.8 (1 - 12)

Promiscuity

275 (45.6)

Primary school

315 (52.2)

High school

288 (47.8)

Private school

319 (53)

Public school

284 (47)

High social level

360 (60)

Orphans

38 (6.3)