Awareness towards the main ILD among primary care physicians

Background: Interstitial lung diseases (ILDs) comprise a group of multiple entities sharing some clinical, functional, and radiological similarities. In many countries primary care setting has been devoid of pre- and post-graduate educational interventions focused on basic knowledge on ILD. This, along with usual nonspecificity of symptoms at presentation, may contribute to diagnostic delay in this disease setting. Methods: We designed a study questionnaire to assess the level of awareness on basic diagnostic and management aspects of core ILDs - idiopathic pulmonary fibrosis (IPF), hypersensitivity pneumonitis, sarcoidosis, connective tissue disease related-ILD, and drug-induced ILD - among primary care physicians (GPs) from five "ACeS Baixo Vouga" health centres and to perceive possible weaknesses. Differences in awareness between GPs under 45 and over 45 years-old were also assessed. Results: Globally, 69% of questions were correctly answered but only 21.9% of GPs considered to have a satisfactory self-perceived level of knowledge on ILD. Except sarcoidosis (p=0.017) and some isolated questions on other diseases, no significant differences were found between physicians below 45 years and above. Though, there was a trend to higher awareness in the younger group. The best awareness was seen in sarcoidosis. IPF questions had the worst performance and only 48.5% of GPs recognized the importance of velcro-type crackles in suggesting a possible diagnosis. Conclusion: Specific attention should be devoted to educational interventions directed to GPs on basic notions on the main ILDs. This could improve the usual diagnostic delay in many ILDs, as a timely diagnosis is essential for an early treatment and prolonged patient survival.