Document Classification

Section Type: RESULTS

Text: During a mean follow-up period of 1. 8 years, adverse events in the two groups included death (4. 3 percent in the aspirin group vs. 9. 7 percent in the warfarin group ; hazard ratio for aspirin relative to warfarin, 0. 46 ; 95 percent confidence interval, 0. 23 to 0. 90 ; P = 0. 02), major hemorrhage (3. 2 percent vs. 8. 3 percent, respectively ; hazard ratio, 0. 39 ; 95 percent confidence interval, 0. 18 to 0. 84 ; P = 0. 01), and myocardial infarction or sudden death (2. 9 percent vs. 7. 3 percent, respectively ; hazard ratio, 0. 40 ; 95 percent confidence interval, 0. 18 to 0. 91 ; P = 0. 02).