. 2006 Sep;61(9):817–827. doi: 10.1136/thx.2005.056093

Table 1 Respiratory and non‐respiratory conditions in which F_eno measurements may have a role in diagnosis.

Increased F_eno	Variable changes in F_eno reported	Decreased F_eno
Asthma¹,⁷⁹Late asthmatic response⁸⁰,⁸¹Allergic rhinitis¹⁹Viral infections⁴³,⁴⁴,⁸²Hepatopulmonary syndrome⁸³Liver cirrhosis⁸⁴,⁸⁵Acute/chronic rejection of lung transplant including bronchiolitis obliterans⁸⁶,⁸⁷,⁸⁸,⁸⁹,⁹⁰	Bronchiectasis⁹¹,⁹²,⁹³COPD¹⁷,⁷⁵,⁷⁸,⁹⁴,⁹⁵,⁹⁶,⁹⁷,⁹⁸,⁹⁹,¹⁰⁰,¹⁰¹,¹⁰²Fibrosing alveolitis¹⁰³Sarcoidosis¹⁰⁴Systemic sclerosis¹⁰⁵,¹⁰⁶,¹⁰⁷	Cystic fibrosis⁹¹,¹⁰⁸,¹⁰⁹,¹¹⁰Primary ciliary dyskinesia¹¹¹,¹¹²Pulmonary hypertension¹¹³HIV infection¹¹⁴ARDS¹¹⁵

Table 1 Respiratory and non‐respiratory conditions in which Feno measurements may have a role in diagnosis.