Table 2.

 Time to benefit (years) at specific thresholds of absolute risk reduction for colorectal cancer screening

Studies	Absolute risk reduction (95% CI)
	Threshold 0.0002	Threshold 0.0005	Threshold 0.001
Segnan et al 201115	6.0 (1.4 to 16.7)	8.4 (2.9 to 19.2)	11.4 (4.9 to 22.7)
Schoen et al 201214	4.6 (2.3 to 8.5)	7.3 (4.6 to 11.1)	10.8 (7.5 to 15.1)
Atkin et al 201012	3.8 (2.2 to 6.0)	5.9 (4.2 to 8.2)	8.6 (6.5 to 11.2)
Holme et al 201413	5.6 (2.7 to 10.3)	7.5 (4.7 to 11.4)	9.8 (6.8 to 13.5)
Summary	4.3 (2.8 to 5.8)	6.6 (5.1 to 8.2)	9.4 (7.6 to 11.3)