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Table 2 Per-protocol and intention-to-treat cecal intubation times by intervention

From: Effect of a proprietary intraluminal stiffening wire device on cecal intubation time and rate with used colonoscopes; a randomized, controlled trial

  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)
  1. *Two cases in this group are excluded from the per-protocol analysis as failure occurred before the assigned intervention could be introduced.
  2. t-test of difference between per-protocol A and B cecal intubation time, P = 0.32.
  3. t-test of difference between per-protocol A and C cecal intubation time, P = 0.31.