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Table 1 Demographic characteristics and risk behaviors (matched and unmatched samples) among PWID, Tehran, 2016

From: Methamphetamine use and HIV risk behavior among men who inject drugs: causal inference using coarsened exact matching

Variables Pooled sample
N = 500 (100%)
Matched sample
N = 370 (100%)
  Number  
Age
 < 30
 ≥ 30
275 (55)
225 (45)
220 (59)
150 (41)
Completed years of education
 < 5 years
 5–8
 > 8
160 (32)
200 (40)
140 (28)
110 (29)
150 (40)
110 (31)
Marital status
 Married
 Single
180 (36)
320 (64)
100 (27)
270 (73)
Age of first drug injecting (years)
 < 25
 ≥ 25
290 (58)
210 (42)
240 (64)
130 (35)
Income (Toomans)
< 500,000
 500,000–1,000,000
 > 1,000,000
190 (38)
180 (36)
130 (26)
120 (32)
130 (35)
120 (28)
Housing status
 Homeless
 Stable home
150 (30)
350 (70)
100 (27)
270 (73)
Receiving opioid maintenance treatments (OMT) 380 (76) 290 (78)
MA use 360 (72) 260 (70)
Condomless sex with any partner in past month 300 (60) 270 (73)
Receptive syringe sharing in past month 220 (44) 160 (43)
Distributive syringe sharing in past month 120 (24) 90 (24)