韩国乳腺癌的发病率和死亡率正在上升。本研究使用覆盖所有韩国女性的国家数据，分析了 2006 年至 2015 年女性乳腺癌发病率和死亡率中基于收入的不平等。我们使用了 2006 年至 2015 年的国家健康信息数据库。对于 20 岁及以上的女性，采用直接法计算了每年按收入五分位数计算的每 10 万人中的年龄标准化乳腺癌发病率和死亡率。计算收入最高和最低五分位数之间每 10 万人中乳腺癌年龄标准化发病率和死亡率的比率和比率差 (RD)，作为不平等的相对和绝对衡量标准。 比较 2006 年和 2015 年时，发病率和死亡率均乳腺癌死亡率增加。尽管发病率较低，但收入最低的五分之一人口的死亡率却较高。 2015年，最高和最低收入五分位数（Q1-Q5）之间基于收入的发病率和死亡率相对差异（RD）分别为-19.9（95% CI，-24.3至-15.5）和4.4（95% CI， 2.9 至 5.8）。在此期间，乳腺癌发病率和死亡率的收入差异没有统计学上的显着趋势。与老年女性相比，中年女性对发病率和死亡率绝对不平等程度 (RD) 的年龄特定贡献更为明显。这项研究发现，韩国的乳腺癌在死亡率方面表现出有利于富人的不平等，尽管有利于穷人发病率的不平等。需要更公平的乳腺癌筛查和治疗政策。

Breast cancer incidence and mortality rates in Korea are increasing. This study analyzed income-based inequalities in the incidence and mortality of female breast cancer from 2006 to 2015, using national data that covered all Korean women.We used the National Health Information Database from 2006 to 2015. For women aged 20 and older, the age-standardized incidence and mortality rates of breast cancer per 100,000 by income quintile per year were calculated using the direct method. The rate ratio and rate difference (RD) of the age-standardized incidence and mortality rates of breast cancer per 100,000 between the top and bottom income quintiles were calculated as relative and absolute measures for inequalities.When comparing 2006 and 2015, both the incidence and mortality rates of breast cancer increased. The lowest income quintile experienced higher mortality rates despite having lower incidence rates. In 2015, the income-based relative difference (RD) in incidence and mortality rates between the highest and lowest income quintiles (Q1-Q5) was -19.9 (95% CI, -24.3 to -15.5) and 4.4 (95% CI, 2.9 to 5.8), respectively. Throughout this period, there was no statistically significant trend in income-based disparities in breast cancer incidence and mortality. The age-specific contributions to the absolute magnitude of inequality (RD) in incidence and mortality were more pronounced among middle-aged women than among older women.This study found that breast cancer in Korea exhibited pro-rich inequalities in mortality despite pro-poor inequalities in incidence. More equitable policies for screening and treatment of breast cancer are needed.