Assessment of Airway Bronchodilation by Spirometry Compared to Airway Obstruction in Young Children with Asthma

Table 2

Sensitivity (% population) of spirometric indices for detecting airway obstruction or dilatation.

	Obstruction			Response to BD
	Mild ()	Moderate ()	Severe ()	Mild	Moderate	Severe
FVC	14.1	40.1	75.0	42.3	64.1	77.3
FEV1	15.3	50.0	90.9	64.7	78.2	86.4
FEV0.5	21.1	56.1	93.1	63.1	70.6	86.4
PEF	18.8	60.5	94.4	89.5	95.1	95.5
FEF25–75	62.4	76.1	97.7	91.8	94.4	93.2
FEF50	67.1	80.0	95.5	87.5	81.2	87.5