Table 1.

Summary of nitric oxide measurements in different clinical conditions

	FeNO	CalvNO	nNO
Asthma	Normal/increased	Normal/increased	Normal/increased
COPD	Normal/increased	Increased	NS
CF	Normal/decreased	Contradictory results	Decreased
PCD	Normal/decreased	Contradictory results	Decreased
Allergic rhinitis	Normal/increased	Normal	NS
BPD	Normal/decreased	Decreased	NS
HPS	Decreased	Increased	NS
PAH	Decreased	Increased	NS
SSc	Normal/decreased	Increased	NS
Rhinovirus infection	Increased	NS	NS
Allograft rejection	Increased	NS	NS

NS: not studied, COPD: chronic obstructive pulmonary disease, CF: cystic fibrosis, PCD: primary ciliary dyskinesia, BPD: bronchopulmonary dysplasia, HPS: hepatopulmonary syndrome, PAH: pulmonary arterial hypertension, SSc: systemic sclerosis.