Relationship between Tongue Temperature Estimated by Infrared Thermography, Tongue Color, and Cold-Heat Pathological Patterns: A Retrospective Chart Review Study

Table 3

Pearson’s correlation between the tongue temperature and color parameters (L, a, and b).

Scale		RET			TC			TT
		L	a	b	L	a	b	L	a	b
R0	r	-0.017	0.108	-0.026	0.012	0.071	-0.093	0.246	-0.011	-0.134
	P-value	0.849	0.216	0.766	0.892	0.418	0.283	0.004	0.897	0.122
R1	r	-0.040	0.100	-0.005	0.038	0.004	-0.101	0.243	-0.051	-0.152
	P-value	0.650	0.250	0.958	0.659	0.962	0.245	0.005	0.555	0.079
R3	r	-0.002	0.086	-0.034	0.009	0.030	-0.079	0.236	-0.024	-0.153
	P-value	0.978	0.320	0.700	0.917	0.728	0.364	0.006	0.786	0.077

Note: a: balance between green (-) and red (+); b: balance between blue (-) and yellow (+); L: luminance; RET: the right edge of the tongue; TC: the tongue center; TT: tongue tip; R₀: tongue center; R₁: right side of the tongue center; R₃: tip of the tongue. P < 0.01.