Table 2.
Number (percentage*) of participants with improvements in self reported measures of physical activity at 12 weeks and 1 year
| Control | Intervention
|
P value† | Intervention
|
P value‡ | ||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 1-4 | ||||
| Outcome at 12 weeks compared with baseline | (n=89) | (n=88) | (n=84) | (n=83) | (n=80) | (n=335) | ||
| Increased physical activity score‡‡ | 13 (16) | 31 (36) | 22 (28) | 28 (35) | 42 (55) | <0.001 | 123 (38) | <0.001 |
| Increased total sessions of vigorous activity | 9 (11) | 22 (26) | 14 (18) | 26 (31) | 32 (40) | <0.001 | 94 (29) | <0.001 |
| Increased total sessions of moderate activity | 11 (13) | 27 (31) | 19 (24) | 24 (30) | 28 (36) | 0.040 | 98 (30) | 0.002 |
| % difference (95% CI for difference) compared with control group | ||||||||
| Increased physical activity score‡‡ | 20 (8 to 33) | 12 (0 to 25) | 19 (6 to 32) | 39 (25 to 53) | 22 (13 to 32) | |||
| Increased total sessions of vigorous activity | 15 (4 to 26) | 7 (−4 to 18) | 21 (9 to 33) | 29 (17 to 42) | 18 (10 to 26) | |||
| Increased total sessions of moderate activity | 18 (6 to 30) | 11 (−1 to 22) | 16 (4 to 29) | 23 (10 to 36) | 17 (8 to 26) | |||
| Outcome at 1 year compared to baseline | ||||||||
| Outcome at 1 year compared with baseline | (n= 91) | (n= 96) | (n= 88) | (n= 88) | (n= 79) | (n= 351) | ||
| Increased physical activity score‡‡ | 21 (23) | 22 (23) | 22 (26) | 27 (31) | 21 (27) | 0.727 | 92 (26) | — |
| Increased total sessions of vigorous activity | 11 (12) | 17 (18) | 19 (22) | 19 (22) | 14 (18) | 0.425 | 69 (20) | — |
| Increased total sessions of moderate activity | 17 (19) | 20 (21) | 18 (21) | 23 (26) | 15 (19) | 0.732 | 76 (22) | — |
| % difference (95% CI for difference) compared with control group | ||||||||
| Increased physical activity score‡‡ | 0 (−12 to 12) | 3 (−10 to 15) | 8 (−5 to 21) | 4 (−10 to 17) | 3 (−7 to 13) | |||
| Increased total sessions of vigorous activity | 6 (−5 to 16) | 10 (−1 to 21) | 10 (−12 to 21) | 6 (−5 to 16) | 8 (−0 to 16) | |||
| Increased total sessions of moderate activity | 22 (−9 to 14) | 23 (−10 to 14) | 8 (−5 to 20) | 0 (−12 to 12) | 3 (−6 to 12) | |||
Intervention 1: one motivational interview within two weeks of baseline assessment; intervention 2: one motivational interview within two weeks of baseline assessment plus 30 vouchers; intervention 3: six motivational interviews over 12 weeks; intervention 4: six motivational interviews over 12 weeks plus 30 vouchers.
*
Calculated using total respondents with complete data for each variable as the denominator.
†
χ2 test for proportions comparing five groups. ‡χ2 test for proportions comparing intervention and control arms.
‡‡
Physical activity score increased by one or more levels from baseline to follow up.