Table 1.
Summary of patient characteristics at time of diagnosis
| Total population N=11,858 (100%) | |
|---|---|
| Age, years | |
| Median (IQR) | 66 (60–74) |
| Sex, n (%) | |
| Male | 6,383 (53.8) |
| BMI | |
| Median (IQR) | 26.5 (23–30) |
| Smoking status, n (%) | |
| Current smoker | 5,539 (46.7) |
| Ex-smoker | 5,893 (49.7) |
| Nonsmoker | 424 (3.6) |
| Number of severe exacerbations during the year prior to and including the initial date of COPD diagnosis, n (%) | |
| 0 | 7,913 (66.7) |
| 1 | 2,300 (19.4) |
| 2 | 853 (7.2) |
| ≥3 | 792 (6.7) |
| Lung function, GOLD grade, n (%) | |
| Mild (FEV1 ≥80% predicted) | 1,674 (14.1) |
| Moderate (50%≤FEV1<80% predicted) | 6,666 (56.2) |
| Severe (30%≤ FEV1<50% predicted) | 2,956 (24.9) |
| Very severe (FEV1<30% predicted) | 562 (4.7) |
| mMRC score, n (%) | |
| 0–1 | 6,937 (58.5) |
| 2+ | 4,921 (41.5) |
| GOLD 2013 classification,* n (%) | |
| GOLD A (low risk, less symptoms) | 4,882 (41) |
| GOLD B (low risk, more symptoms) | 2,933 (25) |
| GOLD C (high risk, less symptoms) | 2,055 (17) |
| GOLD D (high risk, more symptoms) | 1,988 (17) |
Note:
*
GOLD group recorded closet to initial diagnosis, based on GOLD 2013 (A, B, C, and D).
Abbreviations: BMI, body mass index; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 second; GOLD, Global initiative for chronic Obstructive Lung Disease; IQR, interquartile range; mMRC, modified Medical Research Council.