A randomized controlled trial to assess the potential efficacy, feasibility and acceptability of an m-health intervention targeting parents of school aged children to improve the nutritional quality of foods packed in the lunchbox ‘SWAP IT’

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 up^a Mean (CI)	P value	Complete case relative difference between groups at follow up^a Mean (CI)	P value
Outcome	Baseline Mean (SD) (n = 443)	Follow-up Mean (SD) (n = 373	Baseline Mean (SD) (n = 583)	Follow-up Mean (SD) (n = 487)		P value		P value
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