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Table 2 Main findings from the comparison between narrow-band imaging group and conventional group.

From: Narrow-band imaging does not improve detection of colorectal polyps when compared to conventional colonoscopy: a randomized controlled trial and meta-analysis of published studies

Outcome NBI group (n = 241) Conventional group (n = 241) Measurement of the intervention effect* Significance (p)
Total number of polyps (visual inspections) 77 102 RR 0.75 (0.60 to 0.96) 0.02
Proportion of patients with at least one polyp 50 (20.8%) 60 (24.9%) RR 0.83 (0.60 to 1.16) Ns
Mean number of polyps 0.32 (SD 0.73) 0.42 (SD 0.93) MD -0.1 (-0.25 to 0.05) Ns
Rate of polyp ≤ 5 mm 51 (21.2%) 62 (25.7%) RR 0.82 (0.59 to 1.14) Ns
Mean time to find the first polyp (seconds) 230.8 (SD 227.20) 220.81 (SD 233.93) MD 10.80 (-30.27 to 51.87) Ns
  1. * Rate ratio (RR) and 95% CI or mean difference (MD) and 95% CI.