The Association between Family History of Lung Cancer and Development of Lung Cancer: Analysis from the KoGES Data in Korea

초록

Simple Summary: A family history of lung cancer has been reported to increase the risk of lung cancer development. Since a family history of lung cancer is generally regarded as an unmodifiable factor, understanding the relationship between a family history of lung cancer and the development of lung cancer is essential for establishing lung cancer screening strategies. However, previous studies on this issue did not consider various characteristics of study participants, such as age, sex, and smoking status, and there is an ongoing debate regarding which subgroups exhibit a higher genetic predisposition to lung cancer. Furthermore, no data are available on the impact of a family history of lung cancer on lung cancer risk in the general Korean population. Therefore, we aimed to investigate the association between a family history of lung cancer in first-degree relatives and lung cancer development through a comprehensive analysis of a large population-based cohort in Korea. Comprehensive analyses of the association between a family history of lung cancer and lung cancer risk are limited, especially in the Korean population. We used baseline data from the Korean Genome and Epidemiology Study, conducted between 2001 and 2013. This study enrolled 198,980 individuals. Lung cancer diagnoses and family histories were determined using questionnaires. Multivariable logistic regression analysis was performed to evaluate the effect of family history on the risk of lung cancer. Of 198,980 individuals, 6296 (3.2%) and 140 (0.1%) had a family history of lung cancer and lung cancer, respectively. Individuals with a family history of lung cancer in first-degree relatives (FDRs) had a higher risk of lung cancer development than those without (adjusted odds ratio [aOR] = 2.28, 95% confidence interval [CI] = 1.11-4.66). This was more pronounced in young individuals (<60 years) who had affected relatives diagnosed with lung cancer before the age of 60 years (aOR = 3.77, 95% CI = 1.19-11.88). In subgroup analyses, this association was more evident in women, never smokers, and young individuals. A family history of lung cancer, especially in FDRs, is a significant risk factor for lung cancer development in Korea.

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