Investigation of the Correlation between Postherpetic Itch and Neuropathic Pain over Time

Table 6

Comparison of scores at each stage by PHI.

	Acute stage			Subacute stage			Chronic stage
	PHI (+),	PHI (−),		PHI (+),	PHI (−),		PHI (+),	PHI (−),
VAS	71 (41)	72 (4)	0.83	23.5	27.5 (49)	0.59	13.5 (28)	6 (39)	0.23
PDQ	16 (11)	15 (11.5)	0.50	9 (7.5)	9 (11.8)	0.96	8 (6)	4.5 (12)	0.09

Median (interquartile range); P: Mann–Whitney U test; PHI: postherpetic itch; PHI (+): strength scale ≥1; VAS: visual analog scale; PDQ: painDETECT questionnaire.