Patients at risk of NTM-PD who need testing evaluated using a modified Delphi process by European experts

BackgroundIdentifying patients at risk of nontuberculous mycobacterial pulmonary disease (NTM-PD) is challenging. Delays in NTM-PD identification and management are associated with declining lung function and increased morbidity and mortality.Study design and methodsEuropean NTM-PD experts (n=12) participated in a three-round modified Delphi process to score symptoms and comorbidities potentially associated with NTM-PD as reasons to test for NTM.ResultsExperts reached a consensus on the symptoms and comorbidities that should and should not prompt NTM testing. Requirements for testing were scored as high (mean ≥7), medium (mean 4–6), or low (mean ≤4). NTM testing should be undertaken when multiple suggestive symptoms are present simultaneously in all patients except those with cancer (7.3–8.8), or when radiology is indicative of NTM-PD (≥8.9). Symptoms of persistent sputum production, recurrent respiratory infection, and haemoptysis should prompt NTM testing, particularly in those with underlying respiratory diseases. Symptomatic patients with bronchiectasis or previous tuberculosis/NTM-PD or those being prescribed or undergoing long-term macrolide therapy for a respiratory condition should also be tested. Testing is not warranted in patients without an underlying respiratory disorder or in those without a history of respiratory disorders unless presenting with multiple symptoms.ConclusionsAssessing patients’ risk of NTM-PD is challenging. This Delphi consensus process provides insight into symptoms and clinical characteristics that should prompt NTM-PD assessment. Timely testing and diagnosis would enable initiation of appropriate management.