Table 2. Epidemiological and Inhaler Usage Estimates.
| Asthma | COPD | |
| Epidemiological Parameters | ||
| Prevalence, %9 | 6.05 | 1.93 |
| Population of England, n25 | 56 287 000 | 56 287 000 |
| Concomitant asthma and COPD diagnosis, %26 | 14.8 | |
| Adjusted prevalence for ACOS, % | 5.15 | 1.93 |
| Population Estimates | ||
| Patients in England, n | 3 405 364 | 1 086 339 |
| Patients in a 50 000 population PCN, n | 3025 | 965 |
| ACOS adjusted patient numbers for England, n | 2 901 370 | 1 086 339 |
| ACOS adjusted patient numbers per 50 000 patients, n | 2577 | 965 |
| Inhaler Usage Parameters 27 | ||
| pMDIs only, % | 71 | 39 |
| pMDIs only in England, n | 2 069 796 | 425 498 |
| pMDIs only per 50 000 patients, n | 1839 | 378 |
| pMDIs and DPIs, % | 3 | 16 |
| pMDIs and DPIs in England, n | 75 002 | 173 658 |
| pMDIs and DPIs per 50 000 patients, n | 67 | 154 |
Abbreviations: ACOS, asthma-COPD overlap syndrome; DPI, dry powder inhaler; PCN, primary care network; pMDI, pressurised metered-dose inhaler.