Mortality following an AECOPD according to the number of exacerbations in the previous year
| Frequency of AECOPD in the 12 months prior to an AECOPD | Number of deaths | Person-years | Mortality rate and 95% CI (per 1000 person-years) | HR and 95% CI* |
|---|---|---|---|---|
| 0–30 days | ||||
| 0 | 303 | 581 | 522 (466 to 584) | (ref.) |
| 1 | 164 | 338 | 485 (416 to 565) | 0.97 (0.80 to 1.18) |
| 2 | 79 | 179 | 441 (354 to 550) | 0.90 (0.70 to 1.15) |
| 3+ | 86 | 180 | 477 (386 to 589) | 1.03 (0.81 to 1.32) |
| 31 and up to 365 days | ||||
| 0 | 933 | 5830 | 160 (150 to 171) | (ref.) |
| 1 | 359 | 1573 | 228 (206 to 253) | 1.47 (1.30 to 1.66) |
| 2 | 146 | 5205 | 281 (239 to 331) | 1.89 (1.59 to 2.25) |
| 3+ | 63 | 266 | 237 (185 to 303) | 1.59 (1.23 to 2.05) |
Northern Denmark, 2005–2009.
*Adjusted for age (as a continuous variable), sex and comorbidities.
AECOPD, acute exacerbation of chronic obstructive pulmonary disease.