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 |