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Table 1 Characteristics of study participants assessed for willingness to take an opioid antagonist (N = 657)

From: Factors associated with willingness to take extended release naltrexone among injection drug users

Characteristic Willingness Odds ratio (95% CI £ ) p value
No = 315 (%) Yes = 342 (%)
Age [Median, (IQR ¥ )] 49 (41–54) 46 (40–51) 0.98 (0.96–1.00) 0.015
Gender     
 Male 209 (66.3) 199 (58.2)   
 Female 106 (33.7) 143 (41.8) 1.42 (1.03–1.95) 0.032
Caucasian ethnicity     
 No 102 (32.4) 158 (46.2)   
 Yes 213 (67.6) 184 (53.8) 0.56 (0.41–0.77) < 0.001
Daily heroin injection*     
 No 268 (85.1) 270 (79.0)   
 Yes 47 (14.9) 71 (20.8) 1.50 (1.00–2.25) 0.050
Daily cocaine injection*     
 No 289 (91.7) 319 (93.3)   
 Yes 26 (8.3) 23 (6.7) 0.80 (0.45–1.44) 0.457
Daily crack smoking*     
 No 251 (79.7) 279 (81.6)   
 Yes 64 (20.3) 63 (18.4) 0.89 (0.60–1.30) 0.538
Homelessness*     
 No 273 (86.7) 295 (86.3)   
 Yes 42 (13.3) 46 (13.5) 1.01 (0.65–1.59) 0.953
Sex work*     
 No 293 (93.0) 312 (91.2)   
 Yes 22 (7.0) 30 (8.8) 1.28 (0.72–2.27) 0.397
HIV positive     
 No 189 (60.0) 198 (57.9)   
 Yes 126 (40.0) 144 (42.1) 1.09 (0.80–1.49) 0.584
Participation in drug treatment**     
 No 257 (81.6) 275 (80.4)   
 Yes 57 (18.1) 64 (18.7) 1.05 (0.71–1.56) 0.812
  1. NOTE: Percentages do not necessarily sum to 100% due to missing data or rounding error.
  2. *Activities in last 6 months.
  3. **Defined as drug and/or alcohol treatment other than a methadone program.
  4. ¥IQR = inter-quartile range.
  5. £CI = confidence interval.