Table 2:

Simulated time between screening events for different steps in the screening process. Bolded and shaded screening times reflect delays relative to guideline concordant screening.

Scenario	1. Screening Initiation	2. Next FIT after a Normal FIT	3. Follow-Up Colonoscopy After an Abnormal FIT	4. Time to Surveillance Colonoscopy	5. Return to FIT Screening After a Normal Colonoscopy
Guideline concordant screening	Age 50	1 year	0 months	1 to 10 years*	10 years
1 year delay in screening initiation	Age 51	1 year	0 months	1 to 10 years*	10 years
5 year delayed in screening initiation	Age 55	1 year	0 months	1 to 10 years*	10 years
3-month delay in repeated FIT screening after a negative FIT	Age 50	15 months	0 months	1 to 10 years*	10 years
6-month delay in repeated FIT screening after a negative FIT	Age 50	18 months	0 months	1 to 10 years*	10 years
3-month delay in follow-up colonoscopy after an abnormal FIT	Age 50	1 year	3 months	1 to 10 years*	10 years
6-month delay in follow-up colonoscopy after an abnormal FIT	Age 50	1 year	6 months	1 to 10 years*	10 years
3-month delay in receipt of surveillance colonoscopy	Age 50	1 year	0 months	+3 months **	10 years
6-month delay in receipt of surveillance colonoscopy	Age 50	1 year	0 months	+6 months **	10 years
1-year delay in return to screening after normal surveillance or follow-up colonoscopy	Age 50	1 year	0 months	1 to 10 years*	11 years
5-year delay in return to screening after normal surveillance or follow-up colonoscopy	Age 50	1 year	0 months	1 to 10 years*	15 years
Consistent modest delays	Age 51	15 months	3 months	+3 months **	11 years
Consistent large delays	Age 55	18 months	6 months	+6 months ***	15 years

^*Next surveillance exam after prior exam finding at least one adenoma, based on guidelines shown in Table 1

^**Next surveillance exam after prior exam finding at least one adenoma, based on guidelines shown in Table 1 plus 6 months

^***Next surveillance exam after prior exam finding at least one adenoma, based on guidelines shown in Table 1 plus 1 year