Mean activity limitation and quality of life at baseline were 30.1 ( SD , 12.5 ) and 0.51 ( SD , 0.24 ) , respectively , for advice and 30.2 ( SD , 13.2 ) and 0.54 ( SD , 0.24 ) for rehabilitation , increasing to 64.3 ( SD , 13.5 ) and 0.85 ( SD , 0.17 ) for advice vs 64.3 ( SD , 15.1 ) and 0.85 ( SD , 0.20 ) for rehabilitation at 3 months .