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

Table 4

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

Variable	Phase	PD patients ( = 19)	Controls ( = 24)	value
Total	Follicular	32.54 ± 2.73	35.13 ± 2.23	0.463
	Luteal	27.85 ± 2.98	29.08 ± 2.59	0.757
	Menstrual	25.35 ± 2.70	33.07 ± 2.15	0.029
Root	Follicular	65.02 ± 3.99	66.83 ± 2.91	0.709
	Luteal	57.89 ± 4.48	58.17 ± 3.54	0.960
	Menstrual	54.67 ± 4.62	65.51 ± 3.28	0.056
Center	Follicular	24.69 ± 3.66	29.06 ± 3.17	0.370
	Luteal	19.21 ± 3.55	22.90 ± 3.53	0.472
	Menstrual	16.74 ± 3.03	26.28 ± 2.94	0.031
Tip	Follicular	4.23 ± 0.89	6.13 ± 1.22	0.239
	Luteal	3.73 ± 0.85	4.19 ± 0.98	0.733
	Menstrual	3.01 ± 0.55	4.91 ± 0.80	0.073

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