How long has it been since you had your last sigmoidoscopy or colonoscopy?

Response Unweighted Frequency Weighted Percentage Standard Error 95% Confidence Limit
Lower Upper
Within the past year (anytime less than 12 months ago) 1250 24.9 0.7 23.5 26.4
Within the past 2 years (1 year but less than 2 years ago) 960 18.6 0.6 17.3 19.8
Within the past 3 years (2 years but less than 3 years ago) 821 14.5 0.6 13.4 15.6
Within the past 5 years (3 years but less than 5 years ago) 1134 20.7 0.7 19.4 22.0
Within the past 10 years (5 years but less than 10 years ago) 853 15.6 0.6 14.5 16.8
10 or more years ago 312 5.6 0.4 4.8 6.3

Among respondents ages 50 years and older who reported ever having a
sigmoidoscopy or colonoscopy, excluding unknowns and refusals.