Table 5.

IR of heart failure per 1000 person-years, for patients with and without COPD, per age category

Age	Without COPD				With COPD				IRR	95% CI
	IR	95% CI	Cases	Person-time	IR	95% CI	Cases	Person-time
Males
≤64	0.81	0.69 to 0.93	175	217 272.5	4.17	2.59 to 6.26	22	5318.6	5.14	3.30 to 8.00
65–74	4.01	3.48 to 4.61	200	49 855.91	11.60	8.58 to 15.34	49	4224.2	2.89	2.12 to 3.95
≥75	11.84	10.32 to 13.52	218	18 412.75	28.60	22.07 to 36.45	65	2273.0	2.42	1.83 to 3.19
Females
≤64	0.69	0.59 to 0.81	148	213 512.0	4.01	2.54 to 6.02	23	5737.7	5.78	6.67 to 9.06
65–74	3.27	2.81 to 3.78	183	56 025.9	10.59	7.66 to 14.27	43	4059.9	3.24	2.33 to 4.52
≥75	8.34	7.23 to 9.57	203	24 350.1	24.43	18.19 to 32.13	51	2087.2	2.93	2.16 to 3.98
Total study population
≤64	0.75	0.67 to 0.84	323	430 784.53	4.07	2.97 to 5.45	45	11 056.33	5.43	3.98 to 7.41
65–74	3.62	3.26 to 4.00	383	105 881.77	11.11	8.95 to 13.62	92	8284.12	3.07	2.45 to 3.86
≥75	9.85	8.93 to 10.83	421	42 762.87	26.60	21.98 to 31.91	116	4360.18	2.70	2.20 to 3.32

IR per 1000 person-years. Person-time in years.

COPD, chronic obstructive pulmonary disease; IR, incidence rate; IRR, incidence rate ratio.