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

Table 2

Comparison of the tongue body colors between the patient and control groups ( = 43).

Variable	Phase	PD patients ( = 19)	Controls ( = 24)	value
	Follicular	52.91 ± 0.48	52.84 ± 0.52	0.925
	Luteal	52.73 ± 0.66	52.83 ± 0.44	0.901
	Menstrual	52.37 ± 0.54	53.46 ± 0.45	0.127
	Follicular	20.82 ± 0.18	20.79 ± 0.16	0.893
	Luteal	21.21 ± 0.24	21.05 ± 0.20	0.610
	Menstrual	21.25 ± 0.26	20.80 ± 0.14	0.112
	Follicular	13.06 ± 0.26	12.37 ± 0.31	0.107
	Luteal	13.51 ± 0.25	12.90 ± 0.32	0.156
	Menstrual	13.21 ± 0.32	12.72 ± 0.34	0.312

The data are represented as the means ± standard deviations.