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Table 1 Probability of CRC incidence and mortality in the two cohorts - Unadjusted model

From: Methodological approaches to population based research of screening procedures in the presence of selection bias and exposure measurement error: colonoscopy and colorectal cancer outcomes in Ontario

Study cohorts   Colonoscopy Estimate 95% CI Absolute risk difference 95% CI
Unselected cohort (n = 1,341,612)       
  Incidence      
   No 1.61 1.59, 1.63 3.00 2.69, 3.30
   Yes 4.61 4.31,4.91   
  Mortality      
   No 0.36 0.33, 0.38 0.80 0.73, 0.87
   Yes 1.16 1.10, 1.23   
Restricted cohort (n = 1,089,998)       
  Incidence      
   No 1.36 1.35, 1.39 -0.52 -0.60, -0.46
   Yes 0.84 0.77, 0.91   
  Mortality      
   No 0.23 0.19, 0.27 -0.08 -0.13, -0.03
   Yes 0.15 0.12, 0.17   
  1. Data are presented as percentages.
  2. CRC, colorectal cancer; CI, confidence interval.