Table 3. Log-transformed fraction of exhaled nitric oxide (FeNO) values detected by NIOX and RuiBreath devices.

	n	NIOX	RuiBreath	P value
ALL	197	29.94±1.06	32.90±1.05	<0.001
FeNONIOX <25	85	15.67±1.05	18.46±1.04	<0.001
FeNONIOX 25–49	58	33.08±1.03	34.37±1.04	0.180
FeNONIOX 50–99	37	65.74±1.04	63.91±1.05	0.480
FeNONIOX ≥100	17	131.34±1.07	119.84±2.53	0.261

Data are presented as geometric mean ± GSEM.