N (Mean ± SD)

%

Gender

Male (students)

693

56.4%

Female (students)

536

43.6%

Age (mean)

14.5

Classes

8th-grade primary school

421

34.3%

1st-grade secondary school

356

29.0%

2nd-grade secondary school

452

36.8%

School type

Public

677

55.1%

Private

552

44.9%

School location

Urban

665

54.1%

Rural

564

45.9%

Area

Greater Khartoum

107

8.7%

Greater Omdurman

929

75.6%

Greater Bahri

193

15.7%

Family monthly income in USD (mean)

353.4

Family situations

Full family environment

1070

87.1%

No family environment

159

12.9%

Family Living

Lives with both parents

1170

95.2%

Does not live with both parents

59

4.8%

Academic achievements

Top third

361

11.2%

Middle third

679

58.0%

Bottom third

131

30.8%

Tobacco product use

Cigarettes

160

13%

Herbal cigarettes

96

7.8%

Shisha

72

5.9%

Tombak

43

3.5%