Document Classification

Section Type: RESULTS

Text: The occurrence of the composite event was influenced by antibiotic treatment (hazard ratio (HR) 0. 82 ; 95 % CI 0. 68 to 0. 98), age > or = 65 years (HR 1. 22 ; 95 % CI 1. 01 to 1. 47), FEV1 < 50 % predicted (HR 1. 27 ; 95 % CI 1. 05 to 1. 53), > or = 4 AECBs in previous year (HR 1. 63 ; 95 % CI 1. 34 to 1. 99), and acute bronchodilator use (HR 1. 48 ; 95 % CI 1. 17 to 1. 87).