Table 1.

Comparison of colonoscopy data in all participants of the PPT and the PPT-CFS by intervention and control group status

InterventionControl
Participants with end point colonoscopy (n)958947
    Had T1 colonoscopy (n)899869
    Length of follow-up, T1-T4 (y)3.06 (0.02)3.06 (0.02)
    No. of procedures, T1-T4 (n)1.31 (0.02)1.31 (0.03)
Participants in the PPT-CFS (n)*603589
    Had CFS colonoscopy (n)405396
    Had T1 colonoscopy (n)393374
    Length of follow-up, T1-T4 (y)2.97 (0.02)2.98 (0.03)
    No. of procedures, T1-T4 (n)1.41 (0.03)1.51 (0.03)
    Length of follow-up, T4-CFS (y)3.94 (0.07)3.87 (0.07)
    Length of follow-up, T0-CFS (y)8.07 (0.02)7.99 (0.07)
    No. of procedures CFS (n)1.36 (0.04)1.37 (0.04)
  • NOTE: Results presented as means and SEs. T0, baseline (randomization); T1, clearing colonoscopy (year 1); T4, PPT trial end point (year 4).

  • * One thousand one hundred and ninety-four individuals consented to participate in the PPT-CFS; however, on final review of the anonymized data set, two individuals had no colonoscopy data and were therefore omitted from further analysis (n = 1,192). All subsequent PPT-CFS analyses herein were done on the individuals (n = 801) who underwent CFS colonoscopy.