Understanding Population-Based Site-Specific Cancer Incidence Rates in the USA |
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Authors: | Ray M. Merrill Arielle Sloan Lelinneth B. Novilla |
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Affiliation: | 1. Department of Health Science, College of Life Sciences, Brigham Young University, Provo, UT, 84602, USA
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Abstract: | As compared with conventionally reported national population-based incidence rates, incidence rates better represent the ??burden?? of disease if they remove prevalent cases from the denominator. In order to reflect the ??risk?? in a disease-free population, rates should both exclude prevalent cases from the denominator and second or later diagnosed cases at the same site from the numerator. Five common cancers were evaluated through a correction method using 2005?C2007 Surveillance, Epidemiology, and End Results Program data to determine the extent of difference between conventional and corrected incidence rates. These corrections lowered the incidence rates 4.0?C5.8% for female breast cancer, 4.6?C7.6% for melanoma, 3.0?C4.0% for colorectal cancer, and 2.1?C2.5% for lung and bronchus cancer. Corrected incidence rates for prostate cancer were 9.9?C13.7% higher. In cancers with either high prevalence and/or high occurrence of multiple primaries at the same site, corrected population-based incidence rates are warranted. |
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