Survival differences could be narrowed with more equal care access,computer model suggests. WEDNESDAY, May 9 (HealthDay News) -- Differences in screeningaccount for much of the disparity in both colorectal (colon) cancerincidence and death rates between white and black Americans, a newstudy says. The screening differences are responsible for 42 percent of the gapin cancer incidence and 19 percent of the disparity in death rates,according to the study. The study also found that differences in survival linked to thestage of cancer at diagnosis (which likely reflect differences intreatment) account for an additional 36 percent of the disparitybetween blacks and whites in colorectal cancer death rates. The results suggest that equal access to care could greatly reducethese disparities, according to the study published online April 18in the journal Cancer Epidemiology, Biomarkers and Prevention. |
Researchers led by Iris Lansdorp-Vogelaar, then a visitingscientist at the American Cancer Society, used a computer model toapply colorectal cancer screening and survival rates seen amongwhites to black Americans age 50 and older. They then comparedthose rates to actual incidence and death rates in blacks todetermine how much of the racial disparities in colorectal cancerrates are due to differences in screening or stage-specificsurvival. Applying to blacks the screening pattern seen among whites wouldreduce the gap in colorectal cancer incidence rates among those age50 and older from about 28 to 16 cases per 100,000, and reduce thegap in death rates from nearly 27 to 22 deaths per 100,000,according to an American Cancer Society news release. The researchers also found that if blacks had the samestage-specific relative survival as whites, the disparity incolorectal cancer death rates would decrease to about 17 deaths per100,000.
Altogether, differences in screening and survival accounted for 54percent of the disparity in colorectal cancer death rates betweenwhites and blacks. The researchers said the remainder of thedisparity most likely is due to lifestyle factors that increase therisk (such as alcohol use, smoking, obesity and meat consumption)and decrease the risk (such as physical activity andhormone-replacement therapy in women after menopause). More information The U.S. National Cancer Institute has more about colorectal cancer . SOURCE: American Cancer Society, news release, May 3, 2012 Copyright © 2012 HealthDay.
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