Table 2.

Per-protocol and intention-to-treat cecal intubation times by intervention

	Per-protocol intervention
	Unaided colonoscope (A)	Standard wire (B)	Firm wire (C)
Per-protocol Cecal intubation time	15 mins. (CI, 13.6 – 16.4; range, 8 – 25.7)	16.2 mins. (CI, 14.2 – 18.2; range, 8.4 – 26.2)	*13.9 mins. (CI, 12–15.8; range, 6.8 – 23.6)
Intention-to-treat Cecal intubation time	16.7 mins. (CI, 14.9 – 18.5; range, 8 – 32.5)	18.1 mins. (CI, 15.6 – 20.6; range, 8.4 – 40)	15.4 mins. (CI, 13.3 – 17.4; range, 6.8 – 26.1)

*Two cases in this group are excluded from the per-protocol analysis as failure occurred before the assigned intervention could be introduced.

t-test of difference between per-protocol A and B cecal intubation time, P = 0.32.

t-test of difference between per-protocol A and C cecal intubation time, P = 0.31.