All Studies			Studies with no imputed means (SD)
Outcome	No. of studies	No. of participants	Effect size c	No. of studies	No. of participants	Effect size c
1.1 Weight loss (WL) a	14	1562	‐0.95 (95% CI ‐1.75 to ‐0.15)	9	959	‐1.07 (95% CI ‐2.10 to ‐0.05)
1.2 Weight loss (WM) b	2	184	‐0.52 (95% CI ‐2.62 to 1.59)	0	0	Not measured ‐ all studies required imputation
1.3 BMI (WL) a	12	1252	‐0.47 (95% CI ‐0.78 to ‐0.16)	8	913	‐0.52 (95% CI ‐0.91 to ‐0.13)
1.4 BMI (WM) b	2	184	‐0.14 (95% CI ‐0.78 to  0.50)	0	0	Not measured ‐ all studies required imputation
1.5 Waist circumference (WL) a	13	1434	‐0.99 (95% CI ‐1.75 to ‐0.22)	8	913	‐1.25 (95% CI ‐2.24 to ‐0.26)
1.6 Waist circumference (WM) 2	2	184	‐0.75 (95% CI ‐2.66 to 1.15)	0	0	Not measured ‐ all studies required imputation
1.7 Waist‐to‐hip ratio (WL) a	4	339	‐0.00 (95% CI ‐ 0.01 to 0.01)	1	36	0.01 (95% CI 0.01 to 0.01)
Footnotes aWL: weight loss bWM: weight maintenance cStatistical method: mean difference (IV, Random, 95% CI)