Clustering of lung diseases in the family of interstitial lung disease patients

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Abstract

Background: The presence of familial interstitial lung disease (ILD) has been found to predict development of progressive pulmonary fibrosis. However, the role of non-ILD lung diseases in ILD patients’ families has not yet been investigated. We aimed to identify associations between ILDs and non-ILD lung diseases from ILD patients’ self-reported family health history. Methods: We analysed questionnaires on family health history of 1164 ILD patients for the occurrence of ILD and non-ILD lung disease in relatives. Logistic regression analysis was used to study associations with diagnosis groups. Results: Familial pulmonary fibrosis was reported by 20% of patients with idiopathic pulmonary fibrosis (IPF; OR 9.2, 95% CI 4.7–17.9), and 15% of patients with unclassifiable pulmonary fibrosis (OR 4.1, 95% CI 2.0–8.2). Familial occurrence was reported by 14% of patients with sarcoidosis (OR 3.3, 95% CI 1.9–5.8). Regarding non-ILD lung disease, significantly more patients with IPF (36%) reported lung cancer in their family (OR 2.3, 95% CI 1.4–3.5), and patients with hypersensitivity pneumonitis (18%) mostly reported COPD (OR 2.3, 95% CI 1.3–4.2). Comparison of sporadic and familial ILD patients’ reports showed that emphysema (OR 4.6, 95% CI 1.8–11.6), and lung cancer (OR 2.4, 95% CI 1.2–4.9) were predictive for familial pulmonary fibrosis, particularly when reported both in a family (OR 16.7, 95% CI 3.2–86.6; p < 0.001). Conclusions: Our findings provide evidence for clustering of ILD and non-ILD lung diseases in families and show that self-reported emphysema and lung cancer of relatives in this population predicts familial pulmonary fibrosis.

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Terwiel, M., Grutters, J. C., & van Moorsel, C. H. M. (2022). Clustering of lung diseases in the family of interstitial lung disease patients. BMC Pulmonary Medicine, 22(1). https://doi.org/10.1186/s12890-022-01927-x

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