The Prevalence of Lung Cancer in Patients With Interstitial Lung Disease

Study Overview
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Brief Summary
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The investigators will evaluate the prevalence of lung cancer associated with interstitial lung disease (ILD) and idiopathic pulmonary fibrosis (IPF) utilizing the Korean Health Insurance Review and Assessment Service (HIRA) database, spanning the period from January 2011 to December 2011. The database (HIRA-NPS-2011-0001) was based on random sampling of outpatients from whole population. Patients with ILDs, IPF, connective tissue disorder (CTD), and COPD were identified based on the International Classification of Disease-10 (ICD-10) diagnostic codes.

Detailed Description
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The epidemiology of lung cancer related to interstitial lung disease (ILD) with or without with connective tissue disease (CTD) as well as idiopathic pulmonary fibrosis (IPF) has not been well established yet. Interstitial lung disease has a potential to develop lung cancer in the name of scar cancer. The investigators aimed to explore prevalence of lung cancer in patients with ILD with or without CTD and IPF in comparison with chronic obstructive pulmonary disorder (COPD). The investigators will evaluate the prevalence of lung cancer associated with ILD and IPF utilizing the Korean Health Insurance Review and Assessment Service (HIRA) database, spanning the period from January 2011 to December 2011. The database (HIRA-NPS-2011-0001) was based on random sampling of outpatients from whole population. The sample cases are total 1,375,842. Among them 670,258 cases (age > 40) were evaluated. Patients with ILDs, IPF, CTD, and COPD will be identified based on the International Classification of Disease-10 (ICD-10) diagnostic codes.

Official Title
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The Prevalence of Lung Cancer in Patients With Interstitial Lung Disease

Conditions
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Lung Diseases, Interstitial, Lung Cancer

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: equal to above 40 years old Exclusion Criteria: none

Ages Eligible for Study
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Minimum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Lung cancer in population<br>Lung cancer cases in sample population (670,258 cases) | |
| COPD in population<br>COPD cases (670,258 cases) | |
| COPD with lung cancer<br>Lung cancer in COPD | |
| ILD without IPF<br>Interstitial lung disease (ILD) cases without idiopathic pulmonary fibrosis (IPF) | |
| ILD with lung cancer<br>Lung cancer cases in ILD | |
| Idiopathic pulmonary fibrosis<br>Idiopathic pulmonary fibrosis cases | |
| IPF with lung cancer<br>Lung cancer cases in IPF patients | |
| Connective tissue disorder with ILD<br>CTD with ILD cases | |
| CTD ILD with lung cancer<br>Lung cancer cases in CTD with ILD | |
| CTD without ILD<br>CTD with ILD cases in sample population | |
| CTD without ILD with lung cancer<br>Lung cancer in CTD without ILD | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Lung cancer prevalence | Lung cancer prevalence in different groups | Up to 12 months |