Table 3 Effectiveness of SWAP IT: Between group differences in mean total lunchbox energy, energy from recommended foods and percentage energy from recommended foods
Outcome | Intervention | Control | Imputed relative difference between groups at follow upa Mean (CI) | P value | Complete case relative difference between groups at follow upa Mean (CI) | P value | ||
|---|---|---|---|---|---|---|---|---|
Baseline Mean (SD) (n = 443) | Follow-up Mean (SD) (n = 373 | Baseline Mean (SD) (n = 583) | Follow-up Mean (SD) (n = 487) | |||||
Mean total lunchbox energy (kJ) | 2691.85 (863.78) | 2727.94 (920.14) | 2704.60 (959.03) | 2812.71 (959.03) | −131.61 [− 317.26–54.05] | 0.16 | − 133.32 [− 345.31–78.68] | 0.19 |
Mean total lunchbox energy from recommended foods (kJ) | 1578.62 (622.36) | 1624.73 (568.76) | 1607.40 (603.92) | 1569.93 (591.01) | 83.13 [2.65–163.61] | 0.04 | 84.55 [−2.48–171.58] | 0.06 |
Percentage of lunchbox energy from recommended foods | 62.14 (24.09) | 63.73 (23.89) | 62.42 (24.24) | 60.00 (23.91) | 4.86 [−0.22–9.95] | 0.06 | 5.50 [−0.28–11.29] | 0.06 |