Table 3

Mean difference in PD20, PD15, and PD10 (with 95% CI) , and 95% repeatability in doubling doses AMP

Extrapolated PD values excludedExtrapolated PD values included
NoDifference log2 (PD)95% repeatabilityNoDifference log2 (PD)95% repeatability
PD20 280.0 (–0.5 to 0.4)±1.7310.0 (–0.4 to 0.4)±1.6
PD15 290.4 (–0.2 to 0.9)±2.2340.6 (0.0 to 1.2)±2.4
PD10 320.3 (–0.3 to 0.9)±2.4380.4 (–0.2 to 0.9)±2.5
  • PD20, PD15, PD10 = dose of AMP provoking a fall in forced expiratory volume in one second (FEV1) of 20%, 15%, and 10%, respectively.; AMP = adenosine-5′-monophosphate.