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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?

PredictorNumber of participants (n)Unweighted proportion (%)Weighted proportion (%)
Used needle previous used by others in the past 1 month
 Yes17328.329.0
 No43871.771.0
Ever shared a needle with someone else
 Yes25341.441.0
 No25858.659.0
Taken any non-injected drugs other than alcohol in the last 3 months
 Yes20233.135.0
 No40966.965.0
Duration of injection drugs
 < 1 year477.79.0
 1–3 years10817.717.0
 4–6 years11719.129.0
 7–9 years7612.412.0
 10+ years26343.044.0
Used a new sterile needle last time injected
 Yes50382.382.0
 No10817.718.0
Ever used a male condom
 Yes45574.575.0
 No15625.525.0
Alcohol consumption
 Never41367.769.0
 2–3 times a week315.14.9
 more times a week396.45.1
 2–4 times a month12720.820.0
Experience of both form of violence
 Yes33955.558
 No27244.542
Experience of sexual violence
 Yes9114.914
 No52085.186
Experience of physical violence
 Yes22637.035
 No38563.065