Corticosteroids were associated with larger mean scar size at 12 months among Nocardia ulcers ( 0.47 mm , 95 % CI , 0.06-0 .88 , P = .02 ) and no significant difference was identified by treatment for scar size for non-Nocardia ulcers ( -0.06 mm , 95 % CI , -0.21 to 0.10 , P = .46 ) .