Table 1.
Comparison of baseline variables across study conditions (n=281)
| Characteristic | Overall (n=281) | MRC1- (n=94) | MRC+I1 (n=94) | SRC1 (n=93) | χ2 or F-Test | p-value | Multiple comparisons |
|---|---|---|---|---|---|---|---|
| M (SE) or % | M (SE) or % | M (SE) or % | M (SE) or % | ||||
| Gender (%) | |||||||
| Male | 71.2% | 76.6% | 61.7% | 75.3% | χ2 = 6.21, df=2 | 0.045 | MRC+I<MRC, SRC |
| Female | 28.8% | 23.4% | 38.3% | 24.7% | |||
| Race (%) | |||||||
| Non-white | 75.4% | 75.5% | 74.5% | 76.3% | χ2 = 0.09, df=2 | 0.956 | -- |
| White | 24.6% | 24.5% | 25.5% | 23.7% | |||
| Age (years) | 41.0 (0.51) | 40.7 (0.94) | 39.9 (0.86) | 42.4 (0.82) | F(2,278) = 2.25 | 0.107 | -- |
| Education (highest grade completed) | |||||||
| <12 | 37.4% | 35.1% | 36.2% | 40.9% | χ2 = 0.75, df=2 | 0.688 | -- |
| 12+ | 62.6% | 64.9% | 63.8% | 59.1% | |||
| Marital (%) | |||||||
| Not Married | 89.7% | 88.3% | 86.2% | 94.6% | χ2 = 3.90, df=2 | 0.142 | -- |
| Married | 10.3% | 11.7% | 13.8% | 5.4% | |||
| Employment (%) | |||||||
| Unemployed | 81.5% | 75.5% | 85.1% | 83.9% | χ2 = 3.38, df=2 | 0.185 | -- |
| Employed | 18.5% | 24.5% | 14.9% | 16.1% | |||
| Opioid Treatment History (%) | |||||||
| Yes | 73.3% | 73.4% | 79.8% | 66.7% | χ2 = 4.11, df=2 | 0.128 | -- |
| No | 26.7% | 26.6% | 20.2% | 33.3% | |||
| Heroin use (past 30 days) | 27.6 (0.29) | 27.6 (0.51) | 27.0 (0.58) | 28.7 (0.39) | F(2,278) = 2.58 | 0.078 | -- |
| Cocaine use (past 30 days) | 14.8 (0.71) | 15.1 (1.25) | 14.3 (1.23) | 15.0 (1.21) | F(2,278) = 0.13 | 0.878 | -- |
1
MRC=Motivated Referral Condition-only; MRC+I=Motivated Referral Condition + Incentives; SRC=Standard Referral Condition