Sample size calculation
| Arm 1: home visit+protocol | Arm 2: phone call+protocol | Arm 3: standard of care | |
| Total patients | 364 | 364 | 364 |
| Anticipated SSIs | 55 | 55 | 55 |
| Hypothesised patients to return with SSIs | 44 (80%) | 44 (80%) | 22 (40%) |
| Overall hypothesised proportion that will return with SSI | 0.12 | 0.12 | 0.06 |
SSI, surgical site infection.