Histologic Lung Cancer Incidence Rates and Trends vary by Race/Ethnicity and Residential County
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Histologic Lung Cancer Incidence Rates and Trends vary by Race/Ethnicity and Residential County

  • Published Date:

    January 31 2018

  • Source:
    J Thorac Oncol. 13(4):497-509
  • Language:
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  • Alternative Title:
    J Thorac Oncol
  • Description:
    Introduction Lung cancer incidence is higher among NH blacks compared with NH white and Hispanic populations in the U.S. However, national cancer estimates may not always reflect the cancer burden in terms of disparities and incidence in small geographic areas, especially urban-rural disparities. Moreover, there is a gap in the literature regarding rural-urban disparities in terms of cancer histology. Methods Using population-based cancer registry data—Surveillance, Epidemiology and End Results (SEER) and National Program of Cancer Registries (NPCR)—we present age-adjusted histologic rates and trends by race/ethnicity, and residential county location at the time of first cancer diagnosis. Rate ratios were calculated to examine racial/ethnic differences in rates. Annual percent change (APC) was calculated to measure changes in rates over time. Results We find that declines in squamous cell carcinoma (SCC) are occurring fastest in metropolitan counties, while rates of adenocarcinoma increased fastest in counties nonadjacent to metropolitan areas. Further, while NH black men have increased lung cancer incidence compared with NH white and Hispanic men in all geographic locations, we find that the degree of the disparity increases with increasing rurality of residence. Finally, we report that among women diagnosed at less than 55 years of age, the incidence of SCC and adenocarcinoma was higher for NH blacks compared with NH whites. Conclusions Our results highlight disparities among NH blacks in non-adjacent rural areas. These findings may have significant impact for the implementation of smoking cessation and lung cancer screening programs.
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