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) 1112 22.2 0.7 20.9 23.6
Within the past 2 years (1 year but less than 2 years ago) 809 16.0 0.6 14.8 17.2
Within the past 3 years (2 years but less than 3 years ago) 743 14.0 0.6 12.9 15.1
Within the past 5 years (3 years but less than 5 years ago) 1092 19.9 0.6 18.6 21.1
Within the past 10 years (5 years but less than 10 years ago) 1149 20.3 0.6 19.1 21.6
10 or more years ago 443 7.7 0.4 6.8 8.5

Among respondents aged 50 years and older who ever had a
sigmoidoscopy or colonoscopy, excluding unknowns and refusals.