The Study of Dynamic Characteristic of Acupoints Based on the Primary Dysmenorrhea Patients with the Tenderness Reflection on Diji (SP 8)

Table 4

Tenderness threshold value in Diji (SP 8) area in menstrual and nonmenstrual period (kPa).

Group		Menstrual period	Nonmenstrual period	Mean difference
Observation group	Number of effective values	53	38	−0.251	0.001
	Minimum value	0.01	0.1
	Maximum value	1.2	1.6
		0.497 ± 0.040	0.748 ± 0.375^*
Control group	Number of effective values	31	19	−0.027	0.801
	Minimum value	0.1	0.06
	Maximum value	1.61	1.62
		0.724 ± 0.385^*	0.751 ± 0.468
Mean difference		0.227	−0.003
		0.006	0.979

Note: corrected value . ^*Compared with observation group in menstrual period, .