Ultrasound-Guided Stellate Ganglion Block Combined with Extracorporeal Shock Wave Therapy on Postherpetic Neuralgia

Table 2

Comparison of pain disorder index (PDI) after treatment of 3 groups (X ± S).

Group	Cases	Before treatment	After treatment
			2 times	4 times	6 times
Group A	12	46.3 ± 12.1	37.4 ± 10.9^1)	26.4 ± 9.7^1)	11.7 ± 8.4^1)
Group B	12	45.9 ± 7.2	38.7 ± 6.0^1)	25.9 ± 9.5^1)	12.3 ± 7.8^1)
Group C	12	47.5 ± 7.6	33.5 ± 7.6^1)	17.8 ± 7.7^1)2)	4.6 ± 3.2^1)2)

Note. Compared with before treatment, 1) ; compared with different groups, 2) .