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http://dx.doi.org/10.5392/JKCA.2022.22.09.561

Difference in the Incidence Rate of Kidney Cancer in Korea by Relative Level of Household Income and SEER Stage at Diagnosis  

Hwang, Jeong-In (서울대학교 보건환경연구소)
Ki, Myung (고려대학교 보건학협동과정)
Son, Mia (강원대학교 의과대학)
Publication Information
The Journal of the Korea Contents Association / v.22, no.9, 2022 , pp. 561-569 More about this Journal
Abstract
A study was conducted to determine whether there is a difference in the incidence of kidney cancer according to income level and the difference in delayed diagnosis. To this end, the incidence of kidney cancer in Korea was analyzed by income level and by stage. From 2015 to 2017, a national kidney cancer cohort was established by linking the KCCR(Korea Central Cancer Registry), NHISS(National health insurance sharing service), and the HIRA(Health insirance review and assessment service) database to calculate the kidney cancer incidence by stage and income level. During the study period, the incidence of kidney cancer in Korea increased in all income deciles, but decreased only in the medical aid population. The incidence of kidney cancer in Korea was 7.35 per 100,000 people, and 83.54% of them were locoregional kidney cancer. In the top 20% of the income decile, there was a high incidence of 21.46 cases per 100,000 people, among which 18.37 cases were locoregional kidney cancer. On the other hand, even after adjusting for risk factors related to kidney cancer, it was confirmed that the lower the income level, the higher the risk of being diagnosed with kidney cancer with distant metastasis (lowest income 20% adj.OR 1.807, 95% CI 1.411-2.222). In the insured population, the risk ratio of being diagnosed with unknown stage was 1.926 (95% CI 1.317, 2.816). The higher the income level, the higher the frequency of early cancer diagnosis, but the lower the income level, the higher the risk of being diagnosed with metastatic kidney cancer or an unknown stage, so health inequality according to income level was observed.
Keywords
Kidney Cancer; Incidence; Relative Income Level; Early Diagnosis; SEER; Health Inequality;
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