The adjusted mean difference for the exercise vs control group was -0.5 points ( 95 % confidence interval ( CI ) -1.6 , 0.6 ) for the FIHOA score ( 0-30 scale , 0 = best ) and 0.9 points ( 95 % CI 0.1 , 1.7 ) for the PSFS score ( 0-10 scale , 10 = best ) .