Table 2:

Patterns of use of colorectal cancer screening modalities among adults aged 50–74 years in Alberta

Colorectal cancer screening*	Weighted no. of respondents n = 1081168	Proportion of respondents, % (95% CI) n = 4600; weighted n = 1081168
FOBT (guaiac FOBT or FIT), n = 1048500
Had FOBT within previous 2 years	472 500	45.1 (42.7–47.4)
Had FOBT earlier than the previous 2 years	205 900	19.6 (17.8–21.5)
Colonoscopy or sigmoidoscopy, n = 1052500
Had within previous 5 years	359 000	34.1 (32.0–36.2)
Had earlier than the previous 5 years	124 000	11.8 (10.2–13.4)
FOBT and/or colonoscopy, n = 1061000
Had FOBT within last 2 years and/or colonoscopy or sigmoidoscopy within previous 5 years	664 400	62.6 (60.3–64.9)
Had both FOBT within last 2 years and colonoscopy or sigmoidoscopy within previous 5 years	167 100	15.8 (14.3–17.2)
Had FOBT within last 2 years, of those who had colonoscopy or sigmoidoscopy within previous 5 years, n = 354 700	167 100	47.1 (43.3–50.9)
Colonoscopy or sigmoidoscopy as follow-up of FOBT, among those who had colonoscopy or sigmoidoscopy within previous 5 years, n = 225 600	66 400	26.0 (22.3–29.7)

Note: CI = confidence interval, FIT = fecal immunochemical test, FOBT = fecal occult blood test.

^*Provided numerators and denominators are weighted numbers, which were used to calculate the proportion, and numbers were rounded to the nearest 100 value according to the reporting guidelines of Statistic Canada; denominator varies owing to various levels of missing data across variables. Missing data were deleted on a variable basis.