Table 1.

Ventilation distribution (VDP, LVP, MVP and HVP) reported by linear binning and adaptive K-means along with Dice coefficients reflecting their overlap. Both methods reported significantly higher ventilation defect percentage (VDP) and lower medium ventilation percentage (MVP) in asthma vs. control.

	Linear Binning		Adaptive K-means		Dice Coefficient
(%)	Control (N=10)	Asthma (N=19)	Control (N=10)	Asthma (N=19)	Control (N=10)	Asthma (N=19)	All subjects (N=29)
VDP	0.8±1.4	6.1±9.4*	1.8±1.6	7.9±9.7*	0.3±0.2	0.5±0.2	0.4±0.3
LVP	16.5±3.7	20.3±6.7	9.0±2.8	15.6±6.7*	0.7±0.1	0.8±0.1	0.7±0.1
MVP	65.1 ±4.7	58.2±11.2*	76.3±4.6	64.6±12.7*	0.9±0.0	0.9±0.0	0.9±0.0
HVP	17.6±2.2	15.5±5.9	12.912.4	11.9±5.3	0.9±0.1	0.8±0.1	0.8±0.1

Values are expressed as mean ± standard deviation. The symbol * denoted significant difference (p<0.05) between asthma vs. control was observed in a ventilation level measured