Ultrasound-Guided Dry Needling for Trigger Point Inactivation in the Treatment of Postherpetic Neuralgia Mixed with Myofascial Pain Syndrome: A Prospective and Controlled Clinical Study

Table 2

Comparison of the therapeutic effectiveness.

Items	Group D (n = 28)	Group P (n = 26)	t/χ^2/Z	value
The first-week effective rate	10 (35.7%)	0 (0%)	11.18	<0.01
The fourth-week effective rate	19 (67.9%)	0 (0%)	58.74	<0.01
The one-month effective rate	26 (92.9%)	10 (38.5%)	17.95	<0.01
The two-month effective rate	20 (71.4%)	7 (26.9%)	58.74	<0.01
The three-month recurrence rate	2 (7.1%)	9 (34.6%)	6.18	0.02

The VAS score <3 and/or the MPQ score <2 represents effective treatment. The VAS score >3 or the MPQ score >2 represents recurrence.