Sex ratio distribution among subjects with severe asthma from the different participating centres
| Centre | Severe asthma n | Female n (%) | Ratio female:male |
| Montpellier | 15 | 9 (60) | 1.50 |
| Groningen | 8 | 6 (75) | 3.00 |
| Leiden | 12 | 9 (75) | 2.25 |
| Palermo | 17 | 13 (76) | 3.25 |
| Ghent | 9 | 7 (78) | 3.50 |
| Ferrara | 14 | 11 (79) | 3.67 |
| Grosshansdorf | 10 | 8 (80) | 4.00 |
| Barcelona | 8 | 7 (88) | 7.00 |
| Southampton | 18 | 16 (89) | 8.00 |
| Stockholm | 20 | 18 (90) | 9.00 |
| Athens | 21 | 19 (90) | 9.50 |
| Heraklion | 11 | 10 (91) | 10.00 |
| Total | 163 | 133 (82) |
Mean odds ratio female versus male (95% CI): 2.69 (1.6–4.49)
Chi-squared p‐value 0.001