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Table 3 Recent drug use and injection practices

From: Risky injection practices and HCV awareness in Chiang Mai Province, Thailand: a respondent-driven sampling study of people who inject drugs

Drug use and injection practices (N = 164) N (%) Population estimates in % [95% CI]
Drug used in the last 6 months
 Heroin 130 (79.3) 84.5 [77.1–92.0]
 Methamphetamine 74 (45.1) 42.6 [29.7–55.2]
 Sedatives 51 (31.1) 26.7 [16.8–36.5]
 Opium 28 (17.1) 17.8 [9.0–26.6]
 Methadone 115 (70.1) 72.1 [54.6–89.7]
Age at first intravenous drug use (years)
  < 18 31 (18.9) 16.0 [9.2–23.0]
 18–24 63 (38.4) 38.1 [27.9–48.2]
  ≥ 25 70 (42.7) 45.9 [35.2–56.6]
Duration of intravenous drug use since first injection (years)
  < 1 25 (15.2) 15.3 [8.2–22.2]
 1–5 49 (29.9) 31.9 [22.3–41.3]
 5–10 34 (20.7) 16.4 [10.0–23.0]
  ≥ 10 56 (34.2) 36.4 [27.4–45.7]
Frequency of injection (mutually exclusive)
 Every day 55 (33.6) 29.5 [19.0–40.0]
 Several times per week, but less than every day 31 (18.9) 16.0 [9.5–22.5]
 Several times per month, but less than every week 21 (12.8) 13.3 [5.8–20.7]
 Once a month or less 57 (34.8) 41.1 [30.8–51.7]
Needle supplier
 Pharmacy 145 (88.4) 87.9 [81.3–94.4]
 Needle exchange programme 20 (12.2) 8.0 [3.4–12.5]
 Friends 22 (13.4) 16.9 [9.8–24.0]
Shared needles (last 6 months) 45 (27.6) 22.1 [15.7–28.6]
Shared other injection material (last 6 months) 54 (32.9) 32.0 [23.6–40.4]
Reused needles (last 6 months) 109 (66.5) 63.1 [52.2–73.9]
Ever experienced an overdose 43 (26.2) 22.6 [15.0–30.3]