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Table 2 Weighted and unweighted proportion distribution of risk factors among PWID (N = 611)

From: Prevalence and risk factors associated with HIV-1 infection among people who inject drugs in Dar es Salaam, Tanzania: a sign of successful intervention?

Predictor

Number of participants (n)

Unweighted proportion (%)

Weighted proportion (%)

Used needle previous used by others in the past 1 month

 Yes

173

28.3

29.0

 No

438

71.7

71.0

Ever shared a needle with someone else

 Yes

253

41.4

41.0

 No

258

58.6

59.0

Taken any non-injected drugs other than alcohol in the last 3 months

 Yes

202

33.1

35.0

 No

409

66.9

65.0

Duration of injection drugs

 < 1 year

47

7.7

9.0

 1–3 years

108

17.7

17.0

 4–6 years

117

19.1

29.0

 7–9 years

76

12.4

12.0

 10+ years

263

43.0

44.0

Used a new sterile needle last time injected

 Yes

503

82.3

82.0

 No

108

17.7

18.0

Ever used a male condom

 Yes

455

74.5

75.0

 No

156

25.5

25.0

Alcohol consumption

 Never

413

67.7

69.0

 2–3 times a week

31

5.1

4.9

 more times a week

39

6.4

5.1

 2–4 times a month

127

20.8

20.0

Experience of both form of violence

 Yes

339

55.5

58

 No

272

44.5

42

Experience of sexual violence

 Yes

91

14.9

14

 No

520

85.1

86

Experience of physical violence

 Yes

226

37.0

35

 No

385

63.0

65