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Bronchial responsiveness
| Variable | N | A | O | OA | P Value |
|---|---|---|---|---|---|
| ΔFEV1, % | 2.3±0.7 | 8.3±1.1 | 2.6±0.6 | 11.6±1.3 | <0.001 |
| PC20meth, mg/ml | 160.8±22.3 | 4.7±0.6 | 165.6±31.7 | 5.4±0.7 | <0.001 |
Data are means ± SE. ΔFEV1, percentage improvement in FEV1 following albuterol; PC20meth, provocative concentration of methacholine required to reduce the FEV1 20% from control. P values are derived from between-group comparisons.
