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. 2019 Feb 28;12:841–850. doi: 10.2147/JPR.S189390

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© 2019 Xiang et al. This work is published and licensed by Dove Medical Press Limited

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Results of investigation of the pain intensity. (A) The VAS scores of the pain intensity pre (VAS₁) and post (VAS₂) acupuncture (paired t-test, ***P=0.001); (B) The negative correlation between the change in VAS (ie, VAS₁–VAS₂) and pain duration (Pearson correlation, P=0.02).