Impact of lifestyle factors on colorectal polyp detection in the screening setting.
BACKGROUND
Awareness of risk factors for colorectal neoplasia could address risk reduction strategies in asymptomatic subjects.


METHODS
This is a post hoc analysis of a prospective, cross-sectional study of 1321 asymptomatic adults. All the subjects underwent same-day CT colonography and colonoscopy to determine the prevalence of colorectal neoplasia. The variables examined included body mass index, smoking, alcohol consumption, age, and gender. Univariate and logistic regression analyses were performed for detection of colorectal neoplasia and hyperplastic polyps. Odds ratios with 95% confidence intervals were calculated.


RESULTS
Colorectal adenomas and hyperplastic polyps were detected in 378 (28.6%) and 157 (11.9%) participants, respectively. In both univariate and multivariate analysis, increasing age, male gender, and body mass index > or =25 were significantly associated with the detection of colorectal adenomas, with an odds ratio of 1.22 (95% CI,1.09-1.36), 1.28 (95% CI, 1.06-1.45), and 1.34 (95% CI, 1.02-1.77), respectively. A history of smoking was the only identifiable risk factor for hyperplastic polyps (odds ratio, 1.98; 95% CI, 1.41-2.78).


CONCLUSIONS
Body mass index > or =25, increasing age, and male gender were all associated with an increased likelihood of colorectal adenomas at screening, whereas smoking was strongly associated with hyperplastic polyps.
Hassan
C
C
Gastroenterology Unit, Nuovo Regina Margherita Hospital, Rome, Italy. cesareh@hotmail.com
Pickhardt
P J
PJ
Marmo
R
R
Choi
J R
JR
D000236:Adenoma / Q000175:diagnosis* / Q000453:epidemiology; D000367:Age Factors; D000428:Alcohol Drinking / Q000453:epidemiology; D015992:Body Mass Index; D016009:Chi-Square Distribution; D003111:Colonic Polyps / Q000175:diagnosis* / Q000453:epidemiology; D023881:Colonography, Computed Tomographic; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008019:Life Style; D016015:Logistic Models; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology