Table 2. Interaction Between Reason for Emergency Department Visit and Study Group on the Risk of 30 Days of Enrollment in the Triala.
| Study group | Nonopioid overdose–related visit | Opioid overdose–related visit | Opioid overdose–related visit (yes vs no) within strata of study groups, RR (95% CI) | P value | ||||
|---|---|---|---|---|---|---|---|---|
| No. enrolled in SUD program (yes/no) | RR (95% CI) | P value | No. enrolled in SUD program (yes/no) | RR (95% CI) | P value | |||
| Social worker | 59/121 | 1 [Reference] | NA | 38/106 | 0.81 (0.57-1.14) | .22 | 0.81 (0.57-1.14) | .22 |
| Peer | 60/113 | 1.05 (0.78-1.40) | .75 | 43/106 | 0.88 (0.63-1.22) | .44 | 0.84 (0.61-1.16) | .28 |
| Study groups (peer vs social worker) within strata of opioid overdose–related visit | NA | 1.05 (0.78-1.40) | .75 | NA | 1.09 (0.75-1.58) | .65 | NA | NA |
Abbreviations: NA, not applicable; RR, relative risk; SUD, substance use disorder.
a
Log binomial regression models adjusted for the following randomization blocking variables: age category (<50 years), sex at birth, and hospital site.