Table 1.

Agreed consensus statements for the assessment of HP diagnosis and/or cause in patients with unexplained ILD (n=54)

Statements	% agree
All patients with suspected HP on clinical or radiological grounds should be referred for a regional ILD MDT opinion.	83
In patients with ILD of unknown cause, the following clinical features increase the likelihood of a final diagnosis of HP:
History of exposure to a known cause. Similar symptoms in cohabitants or coworkers. Symptoms that improve away from the home or workplace.	96 89 78
The following tests should be requested for all patients with unexplained ILD:
Blood tests for specific IgG to known causes of HP.	81
In day-to-day practice, the following tests are useful in helping to differentiate HP from other forms of ILD:
Specific IgG blood tests to known causes. Natural challenge (eg, improvement with avoidance of exposure).	89 70

HP, hypersensitivity pneumonitis; ILD, interstitial lung disease; MDT, multidisciplinary team.