Comparison 3. Surgical versus non‐surgical weight loss intervention.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
3.1 Mean weight loss (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.2 Body mass index	2	17	Mean Difference (IV, Random, 95% CI)	‐10.43 [‐13.58, ‐7.29]
3.3 Waist circumference (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.4 Body composition: fat mass (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.5 Proteinuria (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.6 Serum creatinine (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.7 C‐reactive protein (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.8 Quality of life: SF36 physical domain (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.9 Quality of life: SF36 mental domain (change score)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected