Compared with the placebo group , the prednisone group showed an adjusted mean 0.3-point ( 95 % CI , -0.4 to 1.0 ; P = .34 ) greater reduction in pain at 3 weeks and a mean 0.6-point ( 95 % CI , -0.2 to 1.3 ; P = .15 ) greater reduction at 52 weeks .