Table 2.
Average total cost per participant per study arm
| Cost category per study arm | Cost per scenario, 2018 USD | |||
|---|---|---|---|---|
| Time estimate, in minutes | Nurse practitioner for CG; counselor for MI | Counselor for CG and MI | Nurse practitioner for CG and MI | |
| CG-only (n = 37) | ||||
| Screening, scheduling, and retention | 10 | 10 | 10 | 10 |
| Face-to-face visits | 50 | 65 | 28 | 65 |
| Visit documentation | 15 | 19 | 8 | 19 |
| Total | 75 | 94 | 47 | 94 |
| CG+HealthCall (n = 38) | ||||
| Screening, scheduling, and retention | 10 | 11 | 11 | 11 |
| Face-to-face visits | 60 | 77 | 34 | 77 |
| Visit documentation | 15 | 19 | 8 | 19 |
| Reminders to use HealthCall | 5 | 4 | 4 | 4 |
| HealthCall troubleshooting | 3 | 2 | 2 | 2 |
| Total | 93 | 114 | 59 | 114 |
| MI+HealthCall (n = 39) | ||||
| Screening, scheduling, and retention | 9 | 10 | 10 | 10 |
| Face-to-face visits | 60 | 34 | 34 | 77 |
| Visit documentation | 15 | 8 | 8 | 19 |
| Reminders to use HealthCall | 3 | 3 | 3 | 3 |
| HealthCall troubleshooting | 2 | 2 | 2 | 2 |
| Total | 89 | 57 | 57 | 111 |
Notes: USD = U.S. dollars; CG = Clinician's Guide; MI = motivational interviewing; time estimates are per interview data; per-protocol time for face-to-face visits was 55 minutes for CG-only, 65 minutes for CG+HealthCall, and 65 minutes for MI+HealthCall.