Differences in the Tongue Features of Primary Dysmenorrhea Patients and Controls over a Normal Menstrual Cycle

Table 3

Comparison of the tongue coating colors between the patients and controls ( = 43).

Variable	Phase	PD patients ( = 19)	Controls ( = 24)	value
	Follicular	44.45 ± 1.29	45.80 ± 1.12	0.431
	Luteal	42.74 ± 1.70	44.17 ± 0.96	0.468
	Menstrual	41.90 ± 1.29	45.41 ± 0.95	0.031
	Follicular	13.50 ± 0.11	13.40 ± 0.10	0.505
	Luteal	13.55 ± 0.13	13.57 ± 0.11	0.907
	Menstrual	13.60 ± 0.13	13.38 ± 0.11	0.218
	Follicular	11.81 ± 0.33	11.08 ± 0.25	0.077
	Luteal	12.47 ± 0.43	11.37 ± 0.29	0.035
	Menstrual	11.97 ± 0.38	11.06 ± 0.31	0.069

The data are represented as the means ± standard deviations; < 0.05.