Study	Weight	Glycemic control	Lipids	Blood pressure
Williams 1968 Study design: RCT Follow‐up interval: 8 weeks	1. Weight change (kg) Delta I (SE): ‐5.0 (0.4) Delta C (SE): ‐3.7 (0.6) Delta (I‐C) (SE): ‐1.3 (0.7)
Silverstone 1966 Study design: RCT Follow‐up interval: 26 weeks	1. Weight change (kg) Delta I (SE): ‐5.0 (0.6) Delta C (SE): ‐3.5 (1.9) Delta (I‐C) (SE): ‐1.5 (2.0) 2. % of weight loss Delta I (SE): ‐5.9 (0.8) Delta C (SE): ‐3.9 (2.1) Delta (I‐C) (SE): ‐2.0 (2.3)
Bratusch‐Marrain 1979 Study design: RCT Follow‐up interval: 8 weeks	1. Weight change (kg) Delta I (SE): ‐3.9 (0.4) Delta C (SE): ‐3.0 (0.5) Delta (I‐C) (SE): ‐0.9 (0.6) 2. % of weight loss Delta I (SE): ‐4.9 (0.5) Delta C (SE): ‐3.3 (0.5) Delta (I‐C) (SE): ‐1.6 (0.7)
Hendon 1962 Study design: Pre vs post Follow‐up interval: 40 weeks	1. Weight change (kg) Delta I (SE): ‐8.8 (1.0)
Mentenero 1964 Study design: Pre vs post Follow‐up interval: 20‐240 days	1. Weight change (kg) Group 1 Delta I (SE): ‐5.3 (0.6) Group 2 Delta I (SE): ‐4.6 (0.9) 2. % of weight loss Group 1 Delta I (SE): ‐5.2 (2.1) Group 2 Delta I (SE): ‐3.9 (3.2)