Document Classification

Section Type: RESULTS

Text: Cox analysis identified 7 variables that were independent predictors of shorter survival time : older age (hazard ratio [HR], 1. 14 per 5 years ; 95 % confidence interval [CI], 1. 03-1. 26), serum sodium level less than 135 mEq/L (HR, 1. 67 ; 95 % CI, 1. 19-2. 32), coronary artery disease (HR 1. 51 ; 95 % CI, 1. 16-1. 95), dementia (HR, 2. 02 ; 95 % CI, 1. 13-3. 61), peripheral vascular disease (HR, 1. 74 ; 95 % CI, 1. 20-2. 52), systolic blood pressure (HR, 0. 95 per 10 mm Hg ; 95 % CI, 0. 92-0. 98), and serum urea nitrogen level (HR, 1. 20 per 10 mg/dL [3. 57 mmol/L] ; 95 % CI, 1. 12-1. 29).