Abstract
Economic status is known to be directly or indirectly related to cancer incidence since it affects accessibility to health-related social resources, preventive medical checkups, and lifestyle. This study investigates the relationship between cancer incidence and family income in Korea. Using the Korean National Health Insurance cancer registration data in 2009, the relationship between their family income class and cancer risk was analyzed. The age-standardized incidence rates of the major cancers were calculated for men and women separately. After adjusting for age, residential area, and number of family members, cancer risks for major cancers according to family income class were estimated using a logistic regression model. In men, the risk of stomach cancer for Income Class 5 (lowest) was 1.12 times (95% CI 1.02-1.23) higher than that of Income Class 1 (highest), for lung cancer 1.61 times (95% CI 1.43- 1.81) higher, for liver cancer 1.22 times (95% CI 1.08-1.37) higher, and for rectal cancer 1.37 times higher (95% CI 1.18-1.59). In women, the risk of stomach cancer for Income Class 5 was 1.22 times higher (95% CI 1.08-1.37) than that for Income Class 1, while for cervical cancer it was 2.47 times higher (95% CI 2.08- 2.94). In contrast, in men, Income Class 1 showed a higher risk of thyroid cancer and prostate cancer than that of Income Class 5, while, in women the same was the case for thyroid cancer. The results show the relationship between family income and cancer risk differs according to type of cancer.
Highlights
Every year, 10.9 million people in the world become new cancer patients, and 6.7 million people die of cancer, accounting for 12% of deaths
This study investigates the relationship between cancer incidence and family income in Korea
After adjusting for age, residential area, and number of family members, cancer risks for major cancers according to family income class were estimated using a logistic regression model
Summary
10.9 million people in the world become new cancer patients, and 6.7 million people die of cancer, accounting for 12% of deaths. If the trend continues, there will be 16 million new cancer patients each year with 10.3 million people dying of cancer in 2020 (WHO and UICC, 2005). The number of new cancer patients has increased every year, from 101,032 in 1999 to 192,561 in 2009, showing an increase of 90.5% from 1999 (MOHW and NCC, 2011). This study investigates the relationship between cancer incidence and family income in Korea. Methods:Using the Korean National Health Insurance cancer registration data in 2009, the relationship between their family income class and cancer risk was analyzed. After adjusting for age, residential area, and number of family members, cancer risks for major cancers according to family income class were estimated using a logistic regression model. Conclusions: The results show the relationship between family income and cancer risk differs according to type of cancer
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