Comparison 2. Diclofenac versus placebo (effect of formulation).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Clinical success	10	2050	Risk Ratio (M‐H, Fixed, 95% CI)	1.60 [1.49, 1.72]
1.1 Plaster ‐ Flector	4	1030	Risk Ratio (M‐H, Fixed, 95% CI)	1.53 [1.36, 1.71]
1.2 Plaster ‐ other	3	474	Risk Ratio (M‐H, Fixed, 95% CI)	1.55 [1.37, 1.75]
1.3 Gel ‐ Emulgel	2	314	Risk Ratio (M‐H, Fixed, 95% CI)	3.84 [2.68, 5.50]
1.4 Gel ‐ other	1	232	Risk Ratio (M‐H, Fixed, 95% CI)	1.15 [1.05, 1.27]