At 9 months , the mean decrease from baseline in the Roland Morris Disability Scale score was 1.7 ( 95 % CI , -2.6 to -0.9 ) points in the usual care group and 3.7 ( 95 % CI , -4.5 to -2.8 ) points in the intervention group ( between-group difference , -1.9 [ 95 % CI , -3.2 to -0.7 ] points ; P = .002 ) .