Table 2– Change in (δ) forced expiratory volume in 1 s (FEV1; % initial#) and bronchodilator response (BDR) by bronchial hyperresponsiveness (BHR)
BHR to methacholineBHR to AMP
PresentAbsentPresentAbsent
ΔFEV1 % initial8.66±5.235.69±2.448.86±5.446.23±1.84
 ≥9461452
 <9+8297120

  • Data are presented as mean±sd or n. AMP: adenosine 5’-monophosphate. #: post-bronchodilator FEV1 minus pre-bronchodilator FEV1, expressed as a percentage increase over pre-bronchodilator FEV1; : positive BDR; +: negative BDR.