Table 5.
Mean VBI duration, fidelity scores and participant engagement for each very brief intervention
| Variable | VBI 1 | VBI 2 | VBI 3 | VBI 4 |
|---|---|---|---|---|
| Motivational | Action planning | Pedometer | Physical activity diary | |
| N (useable recordings) | 11 | 16 | 17 | 14 |
| VBI duration in minutes and seconds/mean (SD) | 5 m 10 s (1 m 54 s) | 4 m 52 s (1 m 08 s) | 5 m 28 s (1 m 33 s) | 4 m 07 s (1 m 01 s) |
| PA recommendations & feedback score*/mean (SD) | 6.3 (1.5) | 6.6 (1.3) | 7.1 (0.9) | 6.4 (2.1) |
| VBI-specific Score*/mean (SD) | 4.2 (1.7) | 4.2 (1.6) | 5.2 (1.5) | 4.2 (1.8) |
| Overall Fidelity Score**/mean (SD) | 10.5 (2.9) | 10.8 (2.4) | 12.3 (2.2) | 10.6 (3.3) |
| Participant engagement §/mean (SD) | 3.0 (0.6) | 3.3 (0.9) | 3.5 (0.7) | 3.1 (0.8) |
*Possible scores range from 0–8
**Possible scores range from 0–16
§Possible scores range from 1–5