A mean reduction of 4 % ( 10 ) ( 95 % confidence interval [ CI ] , -0.147 to -0.03 , p = 0.003 ) of the peak knee adduction moment and 4 % ( 13 ) ( 95 % CI , -0.009 to -0.001 , p = 0.01 ) of the moment arm at baseline was observed in the insole group when walking with an insole was compared with walking without an insole .