Patient characteristics
| Total number of patients 134692 Mean sample size 648 Mean %, female 27.7% | ||
|---|---|---|
| Characteristic | Number of studies* (n=208) | Percentage of studies |
| Age category | ||
| Adult and elderly (≥18) | 195 | 93.8 |
| Adult (18–64) | 4 | 1.9 |
| Elderly (≥65) | 0 | 0.0 |
| NR | 9 | 4.3 |
| Severity of COPD | ||
| Mild to moderate | 10 | 4.8 |
| Mild to severe | 9 | 4.3 |
| Mild to very severe | 8 | 3.8 |
| Moderate | 7 | 3.4 |
| Moderate to severe | 60 | 28.9 |
| Moderate to very severe | 67 | 32.2 |
| Severe | 5 | 2.4 |
| Severe to very severe | 6 | 2.9 |
| Stable (severity NR) | 5 | 2.4 |
| NR | 31 | 14.9 |
| Female, % | ||
| 0–25 | 90 | 43.3 |
| 26–50 | 104 | 50 |
| 51–100 | 4 | 1.9 |
| Not reported | 10 | 4.8 |
*Includes unpublished studies.
COPD, chronic obstructive pulmonary disease; NR, not reported.