Table 7.
Number of deaths, time at risk, and incidence-mortality rate according to COPD severity using only symptoms without obstruction severity
| COPD severity | Distribution at the baseline n (%) | Number of deaths | Total time at risk (person-year) | Mortality rate (per 1,000 person-year) |
|---|---|---|---|---|
| GOLD 20171 based only on symptoms | P=0.093 | |||
| A – Low symptoms/low exacerbations | 363 (69.3) | 69 | 1,664.01 | 41.47 |
| B – High symptoms/low exacerbation | 134 (25.6) | 26 | 688.40 | 37.77 |
| C – Low symptoms/high exacerbations | 10 (1.9) | 4 | 47.81 | 83.67 |
| D – High symptoms/high exacerbation | 17 (3.2) | 7 | 78.79 | 88.85 |
Note: P-values were obtained using the log rank test.
Abbreviation: GOLD, Global Initiative for Chronic Obstructive Lung Disease.