Table 2 Fidelity of key intervention components
Intervention components | Process Evaluation variables | ||
|---|---|---|---|
Dose | Reach n (N) | Fidelity | |
Education materials* | Once | 110/110 | 110/110 |
Incentives (smartcard credits – intervention group) | Weekly for 16-week intervention phase | 35/55 35 completed 16- week intervention§ | 14 bus trip credits were missed and credited late. 3 smartcards replaced and updated for crediting. 1/3 missed an incentive because of card replacement that was later credited Intervention group N = 55: 375/666 possible bus trip targets met |
Text messages (intervention group) | 2 x p/w first 12 weeks, then 1 x p/w until end of 16-week intervention phase | 55/55 | 1185 sent, 17 did not reach participants |