Table 2.

Mean differences in annual changes of BMI and BMIz or risk of overweight between groups^a

	Intervention versus shadow control group			Intervention versus control group			Shadow control versus control group
	n (IG/SG)	β or OR (95% CI)	p value	n (IG/CG)	β or OR (95% CI)	p value	n (SG/CG)	β or OR (95% CI)	p value
BMI (β)
All	241/339	−0.03 (−0.12, 0.06)	0.50	241/236	0.07 (−0.02, 0.15)	0.14	339/236	0.10 (0.01, 0.19)	0.03
Completers	141/339	−0.05 (−0.16, 0.05)	0.32	141/172	0.04 (−0.06, 0.15)	0.42	339/172	0.10 (−0.00, 0.20)	0.06
BMIz (β)
All	241/339	−0.02 (−0.08, 0.05)	0.62	241/236	0.04 (−0.02, 0.10)	0.19	339/236	0.06 (−0.01, 0.12)	0.07
Completers	141/339	−0.03 (−0.10, 0.04)	0.41	141/172	0.03 (−0.05, 0.11)	0.45	339/172	0.06 (−0.01, 0.13)	0.10
Overweight (OR)
All	241/339	1.06 (0.57, 1.97)	0.85	241/236	1.45 (0.73, 2.87)	0.28	339/236	1.14 (0.73, 2.56)	0.33
Completers	141/339	0.86 (0.40, 1.87)	0.71	141/172	0.96 (0.41, 2.27)	0.93	339/172	1.11 (0.57, 2.18)	0.75

IG, intervention group; CG, control group; SG, shadow control group.

^aLinear regression analyses with clustered standard errors performed. Adjusted for baseline measure of outcome, age, sex, and follow-up time.