Promoting healthy weight in primary school children through physical activity and nutrition education: a pragmatic evaluation of the CHANGE! randomised intervention study

Table 5 Significant post-intervention Intervention sub-group interactions

	Body size						Physical activity		Food intake
	Waist circumference		BMI		BMI z-score		LPA		Breakfast
Interactions	Β (95% CI)	p	Β (95% CI)	p	Β (95% CI)	p	Β (95% CI)	p	OR (95% CI)	p
Intervention * sex (crude)	0.46 (−0.57, 1.49)	0.38	0.77 (0.31, 1.23)	0.001	0.34 (0.08, 0.59)	0.01	12.84 (0.18, 25.50)	0.04	1.18 (−0.50, 2.86)	0.76
Girls	n/a	-	−0.39 (−0.81, 0.03)	0.07	−0.18 (−0.42, 0.06)	0.14	−1.05 (−18.10, 16.0)	0.92	n/a	-
Boys	n/a	-	0.47 (0.03 ,0.91)	0.04	0.27 (0.02, 0.52)	0.04	10.25 (−6.31, 26.81)	0.22	n/a	-
Intervention x weight status (crude)	−1.38 (−2.70, -0.05)	0.04	0.10 (−0.51, 0.71)	0.75	−0.01 (−0.33, 0.32)	0.97	1.10 (−14.58, 16.78)	0.89	10.30 (9.30, 11.30)	0.06
NW	−1.34 (−2.00, -0.72)	<0.001	n/a	-	n/a	-	n/a	-	0.67 (0.59, 1.94)	0.53
OWOB	−2.82 (−4.06, -1.58)	<0.001	n/a	-	n/a	-	n/a	-	5.08 (2.73, 7.43)	0.17
Intervention * SES (crude)	0.44 (−0.65, 1.53)	0.42	−0.11 (−0.64, 0.42)	0.68	0.01 (−0.28, 0.30)	0.95	−1.49 (−15.07, 12.09)	0.82	7.69 (5.66, 9.72)	0.05
High SES	n/a	-	n/a	-	n/a	-	n/a	-	8.82 (6.47, 11.16)	0.07
Low SES	n/a	-	n/a	-	n/a	-	n/a	-	0.38 (−1.04, 1.80)	0.19

Notes. Crude analyses (adjusted for interaction terms, group, baseline value of the outcome measure) of interaction terms to evaluate potential effect modification are shown. Where these were significant, adjusted analyses (i.e., interaction term included in adjusted multilevel models) were conducted with results for each effect modifier shown (e.g., for sex, girls’ and boys’ results are reported). Values in bold denote beta (95% CI) and significance values of outcomes with significant intervention effects (P<0.10).

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