Cox models for recurrent falls showed that intervention had a negative effect ( hazard ratio [ HR ] 1.46 , 95 % CI 1.03-2 .09 ) and that functional impairment ( HR 1.42 , 95 % CI 0.97-2 .12 ) , previous falls ( HR 1.09 , 95 % CI 0.74-1 .60 ) , and cognitive impairment ( HR 1.08 , 95 % CI 0.72-1 .60 ) had no effect on the assessment .