Figure 3.

Prebaseline and postbaseline values under different conditions of stopping methacholine challenge test. Condition 1 (n = 55) was applied when the test was stopped because changes in resistance and reactance reached a certain point; Condition 2 (n = 15) was applied when the test was stopped due to signs of respiratory distress. Prebaseline values were significantly different between Conditions 1 and 2 with regard to resistance (p < 0.001) (a) and reactance (p < 0.001) (b). Pre- and postbaseline values in Condition 2 were significantly different with regard to resistance (p < 0.001) (a) and reactance (p = 0.015) (b).