Comparison 3. Silicone gel versus silicone gel with different contact layers.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Scar width ‐ prevention	1	238	Mean Difference (IV, Fixed, 95% CI)	0.80 [‐0.01, 1.61]
2 Scar height ‐ prevention	1	238	Mean Difference (IV, Fixed, 95% CI)	0.0 [‐0.10, 0.10]
3 Scar colour ‐ prevention	1	233	Mean Difference (IV, Fixed, 95% CI)	‐0.20 [‐0.78, 0.38]
4 Scar perfusion ‐ prevention	1	235	Mean Difference (IV, Fixed, 95% CI)	‐1.40 [‐4.25, 1.45]
5 Improvement >50% in cosmesis, itching and pain ‐ treatment	1	80	Risk Ratio (M‐H, Fixed, 95% CI)	0.79 [0.65, 0.96]