Mean scar scores were significantly lower in the treatment group compared with baseline at 6 months ( mean difference , 3.4 ; 95 % CI , 0.2-6 .5 ; P = .03 ) and nominally but not significantly lower compared with baseline at 3 months ( mean difference , 2.4 ; 95 % CI , -0.01 to 4.8 ; P = .052 ) .