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Table 5 Mean VBI duration, fidelity scores and participant engagement for each very brief intervention

From: Development and feasibility study of very brief interventions for physical activity in primary care

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)
  1. *Possible scores range from 0–8
  2. **Possible scores range from 0–16
  3. §Possible scores range from 1–5