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Table 1 Characteristics of persons who inject drugs (PWID) living in Thai Nguyen, Vietnam, in a multi-arm randomized control trial (n = 1673)

From: Characteristics of persons who inject drugs and who witness opioid overdoses in Vietnam: a cross-sectional analysis to inform future overdose prevention programs

  Total study population (N = 1673) Witness to 3 or more overdoses (N = 765) Witness to less than 3 overdoses (N = 908)
Baseline characteristics n (%) n (%) n (%)
Age, median (IQR) (years) 36 (28–44) 35 (28–42) 36 (28–44)
Education
 High school or more 702 (42.0) 362 (47.3) 340 (37.4)
 No high school 971 (58.0) 403 (52.7) 568 (62.6)
Marital status
 Not married or living with a partner 853 (51.0) 403 (52.7) 450 (49.6)
 Married or living with a partner 820 (49.0) 362 (47.3) 458 (50.4)
Employment status
 Less than full-time 436 (26.1) 223 (29.1) 213 (23.5)
 Full-time 1237 (73.9) 542 (70.9) 695 (76.5)
Spent the night outside in the past 3 monthsa
 No 1428 (85.4) 613 (80.1) 815 (89.8)
 Yes 245 (14.6) 152 (19.9) 93 (10.2)
Lifetime history of incarceration
 No 1087 (65.0) 450 (58.9) 637 (70.1)
 Yes 585 (35.0) 314 (41.1)c 271 (29.9)
Lifetime history of drug treatment
 No 1160 (69.3) 481 (62.9) 679 (74.8)
 Yes 513 (30.7) 284 (37.1) 229 (25.2)
Recent non-fatal overdoseb
 No 1569 (93.8) 685 (89.5) 884 (97.4)
 Yes 104 (6.2) 80 (10.5) 24 (2.6)
Daily injecting of drugs
 No 815 (48.7) 298 (38.9) 517 (56.9)
 Yes 858 (51.3) 467 (61.1) 391 (43.1)
Needle purchasing behavior purchased at a pharmacya
 No 222 (13.3) 106 (13.9) 116 (12.8)
 Yes 1450 (86.7) 659 (86.1) 791 (87.1)
 Don’t Know 1 (0.1) 0 (0.0) 1 (0.1)
Receptive needle sharing behavior
 No 1120 (66.9) 478 (62.5) 642 (70.7)
 Yes 553 (33.1) 287 (37.5) 266 (29.3)
Lifetime number of years injecting drugs, median (IQR) (years)d 8 (4–12) 9 (5–13) 7 (3–11)
  1. IQR interquartile range
  2. aPast 3 months
  3. bPast 12 months
  4. cOne individual missing information about incarceration history
  5. dThirteen responses “Don’t Know” (n = 1613)