At 2 years , surgical group was not significantly associated with surgical success rates ( ULS , 59.2 % [ 93/157 ] vs SSLF , 60.5 % [ 92/152 ] ; unadjusted difference , -1.3 % ; 95 % CI , -12.2 % to 9.6 % ; adjusted odds ratio [ OR ] , 0.9 ; 95 % CI , 0.6 to 1.5 ) or serious adverse event rates ( ULS , 16.5 % [ 31/188 ] vs SSLF , 16.7 % [ 31/186 ] ; unadjusted difference , -0.2 % ; 95 % CI , -7.7 % to 7.4 % ; adjusted OR , 0.9 ; 95 % CI , 0.5 to 1.6 ) .