The overall recurrence rates in the Chuanhu anti-gout mixture group ( CH group ) and the Colchicine group ( Col group ) were 12.50 % vs 14.77 % ( difference -2.22 % , 95 % confidence interval ( 95 % CI ) : -10.78 % ~ 6.23 % ) , meeting the predefined non-inferiority criterion of 15 % , as did the data for WHC and CRP .