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. 2018 Jan 30;20(1):e37. doi: 10.2196/jmir.8928

Table 4.

Effectiveness results, dichotomized patient outcomes

Measures Sample size Baseline 6 months Chi-square (P value) Odds ratioa

N n (%) n (%)

Substance use in last 30 days





Any drink (Yes) 207 64 (30.9) 51 (24.6) 3.2 (.07) 0.552

Illicit drug use (Yes) 206 63 (30.6) 36 (17.5) 14.38 (<.001) 0.270

Any drink or drug (Yes) 206 97 (47.1) 69 (33.5) 12.57 (<.001) 0.349
Health care utilization in last 6 months





Currently receive other addiction treatments (Yes) 207 89 (43) 78 (37.7) 1.639 (.20) 0.694
HIV in last 6 months





HIV risky behavior (Yes) 207 76 (36.7) 65 (31.4) 1.818 (.18) 0.667

HIV testing (Yes) 206 81 (39.3) 116 (56.3) 33.03 (<.001) b

aNumbers lower than 1 mean reductions of the events from baseline to 6 months.

bThe odds ratio for this variable cannot be calculated because patients’ HIV testing status was considered current at 6 months if they had been tested at baseline; that is, there were zero patients considered tested at pretest and not tested at 6 months.