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Table 2 Univariate logistic regression analysis, adjusted by baseline sex trade, of variables associated with engaging in sex trade after baseline

From: Sex work involvement among women with long-term opioid injection drug dependence who enter opioid agonist treatment

Variable (a) OR p-value
  (95% CI)  
Treatment Retention: (b) 0.41 0.001
Yes vs. No (0.24, 0.68)  
Social Relations: (c) 1.08 0.009
Every 0.2 unit increase (1.02, 1.14)  
Days injecting drugs: (c) 6.40 < 0.001
High (≥ 20) vs. Low (≤ 8) (3.37,12.18)  
  3.26 0.002
Medium (9-19) vs. Low (≤ 8) (1.53, 6.95)  
Times injecting on a typical day: (d) 5.40 0.001
High (≥ 7) vs. Low (≤ 3) (2.05, 14.22)  
Days with heroin use: 5.12 < 0.001
Every 5 day increase (2.76, 9.52)  
Days with cocaine use: 5.92 < 0.001
Every 5 day increase (2.77, 12.66)  
EQ5D: (e) 0.99 0.019
Every 0.1 unit increase (0.98, 1.00)  
Physical health symptoms: (d) 1.05 0.02
Every 1 unit increase (1.01, 1.09)  
Psychological symptoms: (d) 1.09 < 0.001
Every 1 unit increase (1.06, 1.13)  
  1. OR: Odds ratios; CI: Confidence Interval
  2. (a) All variables refer to the prior month;
  3. (b) Retention to treatment: at least 20 out of prior 30 days;
  4. (c) EuropASI (European version of the Addiction Severity Index). Sub-scale scores range from 0 to 1; higher scores are indicative of more severe problems;
  5. (d) MAP (Maudsley Addiction Profile). Scores range from 0 to 40; higher scores are indicative of more symptoms;
  6. (e) EQ5D (Euroquol) Scores range from 0 to 1; higher scores are indicative of less severe problems; EQ5D index score with U.S. weights.