In multivariable risk-adjusted model , using functionally independent as reference , functionally partially dependent was associated with death ( odds ratio , 3.3 ; 95 % confidence interval , 1.6-6 .8 ; P < 0.001 ) , stroke ( odds ratio , 3 ; 95 % confidence interval , 1.7-5 .4 ; P < 0.001 ) , and other complications ( odds ratio , 2.5 ; 95 % confidence interval , 1.9-3 .2 ; P < 0.001 ) .