Fig. 3From: The add-on effect of the Mutsu-Senshi® skin cooling device for needle insertion pain in hemodialysis patients: a multicenter prospective studySubgroup analyses for the assessment of Mutsu-Senshi® by factor and P value estimated by Wilcoxon rank sum test. ESRD end-stage renal disease. *Median value was ±0 (the same as the lower side of an interquartile range)Back to article page