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Table 3 Odds ratios for colorectal neoplasm detection by colonoscopy cecal insertion times (N = 12,679)

From: The association between cecal insertion time and colorectal neoplasm detection

  Quartiles of cecal insertion time, Odds Ratio (95% CI)
First Second Third Fourth Per 5-minute increase P-trend
(<3.1 min) (3.1-4.6 min) (4.7-7.1 min) (≥7.2 min)
Any colorectal neoplasms       
 Crude OR* (95% CI) 1.00 (ref.) 0.87 (0.78, 0.97) 0.93 (0.83, 1.04) 0.90 (0.80, 1.02) 0.97 (0.92, 1.01) 0.16
 Adjusted OR** (95% CI) 1.00 (ref.) 0.95 (0.85, 1.06) 1.01 (0.89, 1.13) 0.94 (0.83, 1.07) 0.96 (0.91, 1.01) 0.13
Small single adenoma, < 5 mm       
 Crude OR* (95% CI) 1.00 (ref.) 0.80 (0.69, 0.92) 0.83 (0.72, 0.96) 0.77 (0.66, 0.91) 0.89 (0.83, 0.95) 0.001
 Adjusted OR** (95% CI) 1.00 (ref.) 0.87 (0.75, 1.00) 0.91 (0.78, 1.06) 0.84 (0.71, 0.99) 0.90 (0.84, 0.97) 0.005
Medium single adenoma, 5-9 mm       
 Crude OR* (95% CI) 1.00 (ref.) 1.00 (0.78, 1.28) 1.10 (0.86, 1.41) 1.08 (0.83, 1.41) 1.05 (0.94, 1.16) 0.37
 Adjusted OR** (95% CI) 1.00 (ref.) 1.05 (0.82, 1.35) 1.16 (0.89, 1.50) 1.11 (0.84, 1.46) 1.05 (0.94, 1.16) 0.40
Multiple adenomas or advanced colorectal neoplasm       
 Crude OR* (95% CI) 1.00 (ref.) 0.93 (0.80, 1.08) 0.99 (0.85, 1.16) 1.02 (0.86, 1.20) 1.02 (0.96, 1.09) 0.52
 Adjusted OR** (95% CI) 1.00 (ref.) 1.03 (0.88, 1.22) 1.09 (0.92, 1.29) 1.04 (0.87, 1.24) 1.00 (0.93, 1.07) 0.99
  1. * Crude OR conditions on colonoscopist.
  2. ** Adjusted OR adjusts for age, sex, body mass index, waist circumference, family history of colorectal cancer, history of colorectal polyp, diabetes mellitus, hyperlipidemia, aspirin medication, other NSAID medication, calcium supplementation, alcohol use, smoking history, colonoscopist, and bowel preparation.