Prevalence of α1-antitrypsin deficiency (AATD) as a percentage of those chronic obstructive pulmonary disease (COPD) individuals tested by sex and age
| AATD n/COPD n | Percentage (95% CI) | |
| Both sexes | ||
| 20–44 years | 59/212 | 27.8 (21.9–34.4) |
| 45–65 years | 95/431 | 22.0 (18.2–26.3) |
| >65 years | 3/20 | 15.0 (3.2–37.9) |
| All | 157/663 | 23.7 (20.5–27.1) |
| Female | ||
| 20–44 years | 13/86 | 15.1 (8.3–24.5) |
| 45–65 years | 46/218 | 21.1 (15.9–27.1) |
| >65 years | 0/9 | 0.0 (0.0–33.6) |
| All | 59/313 | 18.8 (14.7–23.6) |
| Male | ||
| 20–44 years | 46/126 | 36.5 (28.1–45.6) |
| 45–65 years | 49/213 | 23.0 (17.5–29.2) |
| >65 years | 3/11 | 27.3 (6.0–61.0) |
| All | 98/350 | 28.0 (23.4–33.0) |