From: Risk factors for severe adult-onset asthma: a multi-factor approach
 | N1 total (n with severe asthma) | OR1 (95% CI) | p1 | N2 total (n with severe asthma) | OR2 (95% CI) | p2 |
---|---|---|---|---|---|---|
0–1 | 215 (3) | 1 |  | 215 (3) | 1 |  |
2–3 | 831 (47) | 4.24 (1.31–13.75) | .016 | 829 (45) | 4.06 (1.25–13.18) | .020 |
4–5 | 269 (44) | 13.82 (4.23–45.18) |  < .001 | 262 (37) | 11.62 (3.53–38.25) |  < .001 |