Risk factors for early-onset lung cancer in Korea: analysis of a nationally representative population-based cohort
- Author:
Jihun KANG
1
;
Taeyun KIM
;
Kyung-Do HAN
;
Jin-Hyung JUNG
;
Su-Min JEONG
;
Yo Hwan YEO
;
Kyuwon JUNG
;
Hyun LEE
;
Jong Ho CHO
;
Dong Wook SHIN
Author Information
- Publication Type:Original Article
- From:Epidemiology and Health 2023;45(1):e2023101-
- CountryRepublic of Korea
- Language:0
-
Abstract:
OBJECTIVES:We examined the associations of socioeconomic factors, health behaviors, and comorbidities with early-onset lung cancer.
METHODS:The study included 6,794,287 individuals aged 20-39 years who participated in a Korean national health check-up program from 2009 to 2012. During the follow-up period, 4,684 participants developed lung cancer. Multivariable Cox regression analysis was used to estimate the independent associations of potential risk factors with incident lung cancer.
RESULTS:Older age (multivariable hazard ratio [mHR], 1.13; 95% confidence interval [CI], 1.12 to 1.14) and female sex (mHR, 1.62; 95% CI, 1.49 to 1.75) were associated with increased lung cancer risk. Current smoking was also associated with elevated risk (<10 pack-years: mHR, 1.12; 95% CI, 1.01 to 1.24; ≥10 pack-years: mHR, 1.30; 95% CI, 1.18 to 1.45), but past smoking was not. Although mild alcohol consumption (<10 g/day) was associated with lower lung cancer risk (mHR, 0.92; 95% CI, 0.86 to 0.99), heavier alcohol consumption (≥10 g/day) was not. Higher income (highest vs. lowest quartile: mHR, 0.86; 95% CI, 0.78 to 0.94), physical activity for at least 1,500 metabolic equivalent of task-min/wk (vs. non-exercisers: mHR, 0.83; 95% CI, 0.69 to 0.99) and obesity (vs. normal weight: mHR, 0.89; 95% CI, 0.83 to 0.96) were associated with lower lung cancer risk, whereas metabolic syndrome was associated with increased risk (mHR, 1.13; 95% CI, 1.03 to 1.24).
CONCLUSIONS:In young adults, age, female sex, smoking, and metabolic syndrome were risk factors for early-onset lung cancer, while high income, physical activity, and obesity displayed protective effects.
