Table 1 Characteristics of a community-recruited sample of IDUs in Bangkok, Thailand, participating in the Mitsampan Community Research Project in 2008 and 2009 ( n = 569)
Characteristic | Total n(%) | Study enrolment | |
|---|---|---|---|
2008 | 2009 | ||
252 (44.3%) | 317 (55.7%) | ||
n(column%) | n(column%) | ||
Female gender | 157 (27.6%) | 66 (26.2%) | 91 (28.7%) |
Age | Â | Â | Â |
  < 35 years | 243 (42.7%) | 111 (44.0%) | 132 (41.6%) |
  35-45 years | 175 (30.8%) | 74 (29.4%) | 101 (31.9%) |
  ≥ 46 years | 151 (26.5%) | 67 (26.6%) | 84 (26.5%) |
Drugs injected at least oncea: | Â | Â | Â |
  Heroin | 437 (76.8%) | 230 (91.3%) | 207 (65.3%) |
  Methamphetamine | 352 (61.9%) | 145 (57.5%) | 207 (65.3%) |
  Midazolam | 421 (74.0%) | 166 (65.9%) | 255 (80.4%) |
Self-reported HIV seropositivity | 99 (17.4%) | 29 (11.5%) | 70 (22.1%) |
  Being on antiretroviral therapyb | 54 (54.5%)c | 21 (72.4%)c | 33 (47.1%)c |