Table 2 RDS-adjusted point estimates and confidence intervals of behavioral characteristics related to drug consumption among people who inject drugs in Mozambique, 2013–2014
Maputo (n = 353) | Nampula/Nacala (n = 139) | |||||||
|---|---|---|---|---|---|---|---|---|
na | Crude | Adjb % | 95% CI | na | Crude | Adjb % | 95% CI | |
Age (in years) of first injection drug use, median [IQR] | 24 [9, 46] | 20 [14, 47] | ||||||
< 18 | 37 | 10.9 | 7.0 | 4.5–10.7 | 19 | 13.7 | 9.6 | 4.6–15.0 |
18–24 | 152 | 44.7 | 48.8 | 41.9–55.4 | 83 | 59.7 | 60.1 | 50.5–70.3 |
≥ 25 | 151 | 44.4 | 44.2 | 36.9–50.8 | 37 | 26.6 | 30.3 | 19.8–40.7 |
Missing | 13 | – | – | 0 | – | – | ||
Years since injection initiation, median [IQR] | 7 [0, 35] | 5 [0, 29] | ||||||
0 | 11 | 3.2 | 4.4 | 1.4–7.7 | 5 | 3.6 | 5.1 | 1.6–9.6 |
1–5 | 122 | 35.9 | 41.6 | 34.5–50.7 | 72 | 51.8 | 52.2 | 40.9–63.2 |
6–10 | 87 | 25.6 | 25.1 | 18.0–30.6 | 27 | 19.4 | 19.8 | 12.8–29.7 |
≥ 11 | 120 | 35.3 | 28.9 | 22.7–36.0 | 35 | 25.2 | 22.9 | 12.2–33.0 |
Missing | 13 | – | – | 0 | – | – | ||
Drug most commonly injected | ||||||||
Heroin | 305 | 86.6 | 82.2 | 76.0–87.7 | 105 | 76.1 | 73.3 | 62.0–84.0 |
Cocaine | 47 | 13.4 | 17.8 | 12.3–24.0 | 18 | 13.0 | 14.0 | 5.4–22.3 |
Other (including crack and cocktail mixes) | 0 | 0.0 | 0.0 | 15 | 10.9 | 12.7 | 6.1–22.5 | |
Missing | 1 | – | – | 1 | – | – | ||
Frequency of injection drug use, last 12 months | ||||||||
Did not inject, last 12 months | 18 | 5.1 | 8.6 | 3.9–13.9 | 7 | 5.0 | 3.8 | 0.3–8.1 |
A few times per year | 17 | 4.8 | 5.0 | 2.2–9.0 | 12 | 8.6 | 10.9 | 4.1–19.3 |
A few times per month | 39 | 11.0 | 10.8 | 6.9–15.0 | 31 | 22.3 | 33.5 | 22.4–46.7 |
A few times per week | 39 | 11.0 | 13.6 | 9.0–19.1 | 54 | 38.8 | 32.4 | 23.2–40.6 |
Daily | 240 | 68.0 | 62.0 | 54.4–69.4 | 35 | 25.2 | 19.4 | 11.3–29.5 |
Ever shared a syringe or needle, lifetime | ||||||||
Yes (vs No) | 189 | 53.5 | 50.3 | 43.0–57.6 | 69 | 49.6 | 42.4 | 31.0–55.0 |
Injected drugs, last month | ||||||||
Yes (vs No) | 267 | 75.9 | 67.5 | 58.6–76.7 | 124 | 89.2 | 92.8 | 87.9–98.0 |
Missing | 1 | – | – | 0 | – | – | ||
Number of people with whom shared needles or syringes, last month | ||||||||
0 | 248 | 70.3 | 74.1 | 67.6–79.6 | 98 | 70.5 | 70.8 | 61.8–80.2 |
1–2 | 26 | 7.4 | 6.8 | 3.9–10.5 | 24 | 17.3 | 18.3 | 9.7–26.5 |
≥ 3 | 55 | 15.6 | 14.1 | 9.6–19.3 | 17 | 12.2 | 11.0 | 5.5–17.4 |
Shared, but doesn’t remember with how many | 24 | 6.8 | 5.1 | 2.4–8.4 | 0 | |||