Table 3.
Rates of exacerbations during the follow-up period (per person-year) by GOLD category
| GOLD category | Total person-years at risk | Total number of exacerbations | Rate of exacerbations (per person-year) | 95% CI lower | 95% CI upper |
|---|---|---|---|---|---|
| All patients | 106,382.69 | 152,403 | 1.43 | 1.42 | 1.45 |
| GOLD A | 31,967.67 | 26,562 | 0.83 | 0.81 | 0.85 |
| GOLD B | 18,437.71 | 21,480 | 1.17 | 1.14 | 1.19 |
| GOLD C | 16,638.72 | 29,666 | 1.78 | 1.74 | 1.82 |
| GOLD D | 23,077.24 | 57,893 | 2.51 | 2.47 | 2.55 |
Abbreviations: CI, confidence interval; GOLD, Global Initiative for Chronic Obstructive Lung Disease.