Epidemiology of fibrosing interstitial lung diseases in the department of Haute Garonne

EPIDemio study is a multicenter, prospective and observational study. The objective is to estimate the prevalence and incidence of fibrosing interstitial lung diseases (ILDs) in the department of Haute Garonne (31) in France. Fifty-five pulmonologists from the Toulouse university hospital and 8 private establishments participated in this study. Two hundred and fifty-six cases of fibrosing ILDs were reported (gross overall prevalence: 22.8/100,000 and estimated 30.1/100,000. Idiopathic ILDs represent 55.8% of fibrosing ILDs ahead of systemic disease-related ILDs (24.6%) and ILDs associated with environmental exposure (13.3%). Idiopathic pulmonary fibrosis (IPF) represents 35.9% of fibrosing ILDs, which corresponds to a minimal prevalence of 8.2/100,000 and an estimated prevalence of 11.2/100,000. This study confirms epidemiological data collected in France and Europe.