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The incidence of colorectal cancer (CRC) is roughly 20% higher in blacks than in whites, and associated mortality is roughly 40% higher in blacks. Researchers used a national database of gastroenterology patients to evaluate prospective data on 80,061 whites and 5464 blacks (approximately equal numbers of men and women) who underwent screening colonoscopies.
The prevalence of polyps (≥1 cm in diameter) was 7.7% in blacks and 6.2% in whites. White women had significantly lower risk than did white men (odds ratio, 0.59 for women), but risk was similar in black women and black men. Compared with white women, black women had significantly higher risk (OR, 1.62); compared with white men, black men had significantly higher risk (OR, 1.16). As expe…