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Clinical classification based on GINA guidelines of all asthmatics, including those who returned a positive challenge
| ADULTS | Mild | Moderate | Severe |
| n (Total) | 191 | 151 | 36 |
| n (with PD15) | 80 | 107 | 35 |
| GeoMean PD15 mg (95% CI) | 186 (148, 233) | 78* (58, 106) | 56* (36, 98) |
| CHILDREN | Infrequent Episodic | Frequent Episodic | Persistent |
| n (Total) | 24 | 19 | 66 |
| n (with PD15) | 18 | 14 | 54 |
| GeoMean PD15 mg (95% CI) | 113 (59, 217) | 117 (73, 187) | 67 (46, 99) |
* p < 0.001 compared with mild
