Table 4

Test performance: summary findings

NBI colonoscopy vs histology (reference)Estimate (%)95% CI
Adenoma (yes/no)*
 Sensitivity83.479.6% to 86.9%
 Specificity74.867.6% to 81.1%
 PPV89.285.9% to 92.4%
 NPV64.557.3% to 71.8%
Surveillance (yes/no)*
 Sensitivity73.066.5% to 79.9%
 Specificity75.670.9% to 80.1%
 PPV59.252.3% to 66.0%
 NPV85.281.0% to 89.1%
Exact match67.964.1% to 71.9%
Conservative match87.684.6% to 90.4%
  • *For explanation see table 3.

  • NBI, narrow band imaging; NPV, negative predictive value; PPV, positive predictive value.