Document Classification

Section Type: RESULTS

Text: The incidences were 28. 2, 23. 8, and 31. 2 per 100 person-years in the patients with mild, moderate, and severe COPD, respectively, in the placebo group, and 4. 5, 13. 2, and 4. 6 per 100 person-years in the patients with mild, moderate, and severe COPD, respectively, in the vaccine group (RR, 0. 16 [p = 0. 06] ; vaccine effectiveness, 84 % ; RR, 0. 55 [p = 0. 5] ; vaccine effectiveness, 45 % ; and RR, 0. 15 [p = 0. 04] ; vaccine effectiveness, 85 %, in the patients with mild, moderate, and severe COPD, respectively).