Table 1.
Characteristics of patients in the study cohort. Number of patients (and percent of cohort) are reported unless otherwise indicated
| Patient-related variables | Study cohort (N=176,338) |
|---|---|
| Female sex (%) | 85,507 (48.5%) |
| Age (SDa) | 68.7 (12.5) |
| Year from COPD Diagnosis | 6.1 (4.3) |
| Death | 75,997 (43.1%) |
| Socioeconomic scale (%) | |
| Quantile 1 | 46,924 (26.6%) |
| Quantile 2 | 37,549 (21.3%) |
| Quantile 3 | 32,610 (18.5%) |
| Quantile 4 | 29,695 (16.8%) |
| Quantile 5 | 25,416 (14.4%) |
| Unknown | 4144 (2.35%) |
| Rural area | 30,153 (17.1%) |
| Patient-year-related variables | |
| COPD hospitalization | 179,912 (15.5%) |
| COPD-related outpatient visits | |
| No outpatient visit | 566,648 (48.8%) |
| ≥1 GP visit | 470,329 (40.6%) |
| ≥1 Specialist visit | 121,798 (10.5%) |
| Charlson comorbidity score (SD) | 1.2 (2.4) |
| History of asthma diagnosis | 180,926 (15.6%) |
| Pulmonary function test (PFT) | 132,047 (11.4%) |
Note: aStandard deviation.
Abbreviation: COPD, chronic obstructive pulmonary disease.