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Table 2 The association of endoscopic and laboratory findings to tongue color

From: The association between objective tongue color and endoscopic findings: results from the Kyushu and Okinawa population study (KOPS)

  Normal (n = 218) EH (n = 110) EE (n = 35) EG (n = 45) H.pylori (+) (n = 56) H.pylori (+) + SAG (n = 67)
1L* 68.0 ± 3.7 67.7 ± 4.2 68.7 ± 4.3 68.6 ± 3.4 68.0 ± 4.0 67.4 ± 3.7
1a* 24.8 ± 4.3 25.6 ± 5.1 25.5 ± 4.1 25.9 ± 5.2 24.6 ± 4.3 24.7 ± 5.0
1b* 5.19 ± 2.91 4.72 ± 2.73 5.14 ± 2.67 6.04 ± 2.75 5.04 ± 3.21 4.93 ± 2.89
2L* 65.4 ± 9.7 64.5 ± 10.7 67.3 ± 5.7 67.1 ± 5.3 65.9 ± 7.9 65.8 ± 6.9
2a* 15.2 ± 5.0 15.3 ± 5.4 14.8 ± 4.5 16.7 ± 3.8 15.5 ± 4.4 15.8 ± 4.9
2b* 5.86 ± 2.97 6.49 ± 7.82 6.09 ± 4.33 6.34 ± 2.74 5.23 ± 2.65 5.07 ± 3.23
3L* 69.4 ± 3.6 69.3 ± 3.5 70.3 ± 3.6 70.4 ± 2.8 70.8 ± 3.2* 69.8 ± 3.7
3a* 23.5 ± 4.2 24.0 ± 4.7 23.9 ± 4.8 25.3 ± 4.2# 23.8 ± 6.1 23.4 ± 4.8
3b* 4.72 ± 2.64 4.61 ± 2.35 4.55 ± 2.62 5.81 ± 2.67* 5.04 ± 3.56 4.74 ± 2.65
4L* 66.9 ± 3.8 66.9 ± 3.8 66.6 ± 3.8 67.0 ± 3.1 67.2 ± 3.4 66.2 ± 3.5
4a* 29.7 ± 5.3 30.7 ± 7.0 29.3 ± 4.6 31.0 ± 5.6 29.0 ± 6.9 29.1 ± 4.7
4b* 5.77 ± 2.84 5.32 ± 2.86 5.26 ± 2.17 6.20 ± 3.01 5.27 ± 4.21 5.33 ± 2.88
2L*/1 L* 0.96 ± 0.14 0.96 ± 0.16 0.98 ± 0.09 0.98 ± 0.08 0.97 ± 0.11 0.98 ± 0.11
2a*/1a* 0.62 ± 0.20 0.61 ± 0.20 0.59 ± 0.17 0.66 ± 0.17 0.63 ± 0.14 0.64 ± 0.16
2b*/1b* 0.99 ± 2.61 1.70 ± 3.43# 1.63 ± 3.15 0.91 ± 1.94 0.44 ± 4.22 0.78 ± 3.00
3L*/1 L* 1.02 ± 0.05 1.03 ± 0.01 1.02 ± 0.05 1.03 ± 0.04 1.04 ± 0.05s 1.04 ± 0.07*
3a*/1a* 0.96 ± 0.16 0.95 ± 0.17 0.95 ± 0.16 1.00 ± 0.16 0.97 ± 0.17 0.96 ± 0.18
3b*/1b* 0.82 ± 1.45 0.81 ± 0.64 0.90 ± 0.77 0.95 ± 0.41 0.44 ± 3.70 1.13 ± 0.97
4L*/1 L* 0.98 ± 0.05 0.98 ± 0.05 0.97 ± 0.05 0.98 ± 0.05 0.99 ± 0.04 0.98 ± 0.06
4a*/1a* 1.21 ± 0.22 1.21 ± 0.22 1.17 ± 0.18 1.22 ± 0.20 1.19 ± 0.26 1.21 ± 0.25
4b*/1b* 1.06 ± 1.24 1.11 ± 1.73 1.11 ± 0.88 0.77 ± 2.24 1.03 ± 0.78 1.08 ± 1.61
  1. EH esophageal, EE Erosive esophagitis, EG Erosive gastritis, SAG Serological atrophic gastritis, H.pylori(+) ant-H.pylori antiody positive # < 0.05 vsNormal, $ < 0.01 vs Normal
  2. *refers to international commission on Illumination (CIE) 1976L*a*b* color space standards