Evidence-Based Complementary and Alternative Medicine / 2012 / Article / Fig 13

Research Article

Effects of Somatothermal Far-Infrared Ray on Primary Dysmenorrhea: A Pilot Study

Figure 13

The duration of menstrual pain presented by (a) a box-and-whisker plot and (b) a bar chart indicating the average and standard deviation. The symbol ** indicates a highly significant difference between groups using the Wilcoxon Signed-Rank Test.