Color Distribution Differences in the Tongue in Sleep Disorder

Table 5

Paired comparison of the color histogram variables in the same subjects between the first and second experiments.

Variables	Normal (𝑛=18)	SD (𝑛=18)	𝑃 value
V1	^†0.050 (0.035)	0.049 (0.021)	0.938
V2	0.108 (0.064)	0.133 (0.061)	0.019*
V3	0.172 (0.066)	0.198 (0.086)	0.135
V4	0.145 (0.074)	0.173 (0.085)	0.055
V5	0.077 (0.069)	0.074 (0.079)	0.087
V6	0.207 (0.085)	0.169 (0.081)	0.075
V7	0.086 (0.076)	0.050 (0.072)	0.047*

Normal: subjects who were normal in the first experiment; SD: subjects with sleep disorder in the second experiment, ^†mean (standard deviation); 𝑃 values for variables were derived from the one-sample Student’s 𝑡-test (*𝑃<0.05).