Binary multiple logistic regression analysis for the likelihood of ≥1 asthma attack during follow-up (n=460)
| Variable | OR | 95% CI | P value |
| Age (years) | 0.92 | 0.83 to 1.01 | 0.08 |
| Male | 0.61 | 0.36 to 1.04 | 0.07 |
| ≥1 asthma attack in preceding 6 months at baseline | 2.03 | 1.15 to 3.60 | 0.02 |
| ACT/CACT <20 at baseline | 1.07 | 0.62 to 1.85 | 0.80 |
| FEV1 z-score | 1.12 | 0.84 to 1.50 | 0.43 |
| FEV1/FVC z-score | 0.97 | 0.71 to 1.31 | 0.82 |
| FeNO (ppb) | 1.02 | 1.01 to 1.02 | <0.001 |
| Deprivation index of registered practice | 0.95 | 0.86 to 1.05 | 0.31 |
| BMI ≥91st centile (overweight/obese) | 1.10 | 0.62 to 1.94 | 0.75 |
| AMR at baseline | 1.41 | 0.68 to 2.92 | 0.36 |
| Ethnicity (reference ethnic group=white) | |||
| Black | 0.33 | 0.06 to 1.77 | 0.20 |
| Asian | 0.32 | 0.13 to 0.83 | 0.02 |
| Mixed/other | 1.01 | 0.33 to 3.14 | 0.99 |
ACT, asthma control test; AMR, asthma medication ratio; BMI, body mass index; CACT, childhood asthma control test; FeNO, fraction of exhaled nitric oxide; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.