Table 3.
Color differences among esophageal mucosa, gastric mucosa, and SSBE.
| WLI | NBI | TXI | p Value | ||||
|---|---|---|---|---|---|---|---|
| WLI vs. NBI | NBI vs. TXI | TXI vs. WLI | |||||
| Esophageal mucosa | ΔL* | 9.6 ± 9.0 | 24.1 ± 13.6 | 12.7 ± 8.7 | <0.001 | <0.010 | 0.062 |
| (vs. gastric mucosa) | Δa* | −3.3 ± 6.0 | −20.0 ± 8.2 | −5.8 ± 7.9 | <0.001 | <0.001 | 0.045 |
| Δb* | −7.6 ± 4.3 | −3.3 ± 3.9 | −6.8 ± 4.9 | <0.001 | 0.002 | 0.380 | |
| ΔE* | 15.7 ± 6.9 | 33.4 ± 11.8 | 18.2 ± 8.3 | <0.001 | <0.001 | 0.069 | |
| Esophageal mucosa | ΔL* | 7.9 ± 7.7 | 22.0 ± 11.5 | 9.3 ± 7.2 | <0.001 | <0.001 | 0.305 |
| (vs. Barrett’s esophagus) | Δa* | −4.0 ± 4.4 | −15.2 ± 6.2 | −5.6 ± 6.5 | <0.001 | <0.001 | 0.243 |
| Δb* | −7.7 ± 3.9 | −2.1 ± 2.2 | −7.1 ± 4.0 | <0.001 | <0.001 | 0.662 | |
| ΔE* | 14.0 ± 5.8 # | 27.7 ± 11.1 # | 15.3 ± 6.6 # | <0.001 | <0.001 | 0.390 | |
| Gastric mucosa | ΔL* | −2.1 ± 6.0 | −2.5 ± 9.8 | −3.6 ± 7.1 | 0.336 | 0.426 | 0.415 |
| (vs. Barrett’s esophagus) | Δa* | −0.4 ± 3.5 | 5.8 ± 5.6 | −0.3 ± 5.3 | <0.001 | <0.001 | 0.482 |
| Δb* | −0.2 ± 2.2 | 1.7 ± 2.6 | −0.5 ± 3.4 | 0.008 | 0.009 | 0.801 | |
| ΔE* | 6.7 ± 3.3 #,$ | 10.8 ± 7.6 #,$ | 8.8 ± 4.9 #, $ | 0.014 | 0.212 | 0.049 |
Abbreviations: NBI: narrow-band imaging, WLI: white-light imaging, ΔL*: change in brightness, Δa*: change in red-green component, Δb*: change in yellow-blue component, ΔE*: color difference. #: <0.05 vs. color differences between esophageal mucosa and gastric mucosa. $: < 0.05 vs. color differences between esophageal mucosa and SSBE.