Table 2.

Subgroup analyses on change in BMI according to setting and treatment organization.

Subgroups	Number of studies	Number of participants	Meta-analyses, mean difference (95% CI)	Statistical heterogeneity		Test for differences between subgroups
				P value	I 2 value	P value	I 2 value
Change from baseline to 6 months
Subgroups on treatment settings
Specialist health care	8	816	−1.28 (−1.82 to −0.74)	<0.00001	76%	0.02	68.7%
Primary health care	2	505	−0.10 (−0.64 to 0.43)	0.70	0%
Schools	3	213	−0.90 (−1.66 to −0.13)	0.02	65%
Internet	1	57	−0.84 (−1.49 to −0.19)	0.01	NA
Subgroups on treatment organization
Group treatment	8	827	−1.20 (−1.69 to −0.70)	<0.00001	74%	0.0002	88.4%
Individual treatment	5	698	−0.39 (−0.75 to −0.03)	0.03	0%
Group and Individual treatment	1	66	−1.61 (−2.09 to −1.13)	<0.00001	NA
Change from baseline to 12 months
Subgroups on treatment settings
Specialist health care	6	871	−1.07 (−2.12 to −0.02)	0.05	89%	0.05	62.7%
Primary health care	6	1424	−0.25 (−0.44 to −0.07)	0.007	3%
Schools	6	886	−0.66 (−1.40 to 0.08)	0.08	81%
Internet	1	57	−1.36 (−2.28 to −0.44)	0.004	NA
Subgroups on treatment organization
Group treatment	13	1893	−0.84 (−1.41 to −0.27)	0.004	84%	0.26	26.4%
Individual treatment	5	1254	−0.32 (−0.57 to −0.06)	0.02	32%
Group and Individual treatment	1	91	−0.41 (−1.18 to 0.36)	0.3	NA
Change from baseline to 24 months
Subgroups on treatment settings
Specialist health care	5	546	−0.74 (−1.66 to 0.19)	0.12	75%	0.41	0%
Primary health care	1	151	−1.00 (−2.45 to 0.45)	0.18	NA
Schools	2	131	−1.59 (−2.45 to −0.72)	0.0003	0%
Subgroups on treatment organization
Group treatment	7	737	−1.02 (−1.84 to −0.19)	0.02	70%	0.62	0%
Individual treatment	0	0	Not estimable	NA	NA
Group and Individual treatment	1	91	−0.73 (−1.51 to 0.05)	0.07	NA

NA = not applicable.