Baseline characteristics for patients in cohort
| Characteristic at diagnosis of COPD in primary care | Cohort (n=7002) | |
|---|---|---|
| n | Per cent | |
| Sex | ||
| Male | 3585 | 51.2 |
| Deprivation | ||
| Quintile 1 (most deprived) | 2199 | 31.4 |
| Quintile 2 | 1789 | 25.5 |
| Quintile 3 | 1367 | 19.5 |
| Quintile 4 | 999 | 14.3 |
| Quintile 5 (least deprived) | 648 | 9.3 |
| COPD severity (% predicted forced expiratory volume) | ||
| Mild (≥80) | 781 | 11.2 |
| Moderate (≥50 and <80) | 3203 | 45.7 |
| Severe (≥30 and <50) | 1516 | 21.7 |
| Very severe (<30) | 357 | 5.1 |
| Unknown | 1145 | 16.4 |
| Body mass index (kg/m2) | ||
| Low (≥12 and <20) | 754 | 10.8 |
| Normal (≥20 and <25) | 1894 | 27.0 |
| High (≥25) | 3106 | 44.4 |
| Unknown | 1248 | 17.8 |
| Smoking status | ||
| Current smoker | 4003 | 57.2 |
| Not current smoker | 2431 | 34.7 |
| Never smoked | 274 | 3.9 |
| Unknown | 294 | 4.2 |
| Asthma comorbidity | 1061 | 15.2 |
| Other respiratory comorbidity | 530 | 7.6 |
| Non-respiratory comorbidity | 2524 | 36.0 |
| Prior admission with COPD | 1482 | 21.2 |
| Prior intervention for COPD | 3469 | 49.5 |
COPD, chronic obstructive pulmonary disease.