Use of intralesional collagenase in the treatment of peyronie’s disease: A review

Table 1 Study designs

Ref.	No. of patients	Study design	Length of study	Control group	Length of follow up
Gelbard et al[22]	31	Prospective	Mean of 22 mo per patient	None	9.8 mo (mean)
Gelbard et al[23]	49	Double blind, RCT	3 mo	Placebo	3 mo
Jordan[24]	25	Prospective	9 mo	None	None
Gelbard et al[25]	147	Double blind, RCT	Up to 18 wk	Placebo	None
Gelbard et al[26]	832	Double blind, RCT	Up to 52 wk	Placebo	None

RCT: Randomised controlled clinical trial.