Colorectal cancer risk differs based on patient demographics.
Dr David Lieberman and colleagues from Oregon, USA measured the prevalence of significant colorectal polyps in average-risk individuals, and determined differences based on age, sex, race, or ethnicity.
In a prospective study, colonoscopy data were collected, using an endoscopic report generator, from 327,785 average-risk adults who underwent colorectal cancer screening at 84 gastrointestinal practice sites from 2000 to 2011.
Demographic characteristics included age, sex, race, and ethnicity.
The team's primary outcome was the presence of suspected malignancy or large polyp(s) >9 mm.
|The prevalence of large polyps was 6% in white men 50−54 years old|
The benchmark risk for age to initiate screening was based on white men, 50−54 years old.
Risk of large polyps and tumors increased progressively in men and women with age.
The researchers found that women had lower risks than men in every age group, regardless of race.
The team observed that blacks had higher risk than whites from ages 50 through 65 years and Hispanics had lower risk than whites from ages 50 through 80 years.
The prevalence of large polyps was 6% in white men 50−54 years old.
The team noted that the risk was similar among the groups of white women 65−69 years old, black women 55−59 years old, black men 50−54 years old, Hispanic women 70−74 years old, and Hispanic men 55−59 years old.
The risk of proximal large polyps increased with age, female sex, and black race.
Dr Lieberman and team concluded, "There are differences in the prevalence and location of large polyps and tumors in average-risk individuals based on age, sex, race, and ethnicity."
"These findings could be used to select ages at which specific groups should begin colorectal cancer screening."