This randomized, double-blinded, sham acupuncture controlled trial is aimed to assess the effectiveness and safety of acupuncture in the treatment of Primary Sjögren Syndrome.The eligible participants will be randomly allocated to receive acupuncture or sham acupuncture for 8 weeks.~Assuming a two-sided alpha of 0.05, power of 85%, and a 20% drop-out, a sample sized of 30 would be needed for each group. The statistical analysis will be based on the intention-to-treat principle. Continuous variables will be compared by Student t test or Mann-Whitney U test; categorical variables will be analyzed by chi-square test, Fisher's exact test or Kruskal-Wallis H test as appropriate. For comparison between two time points, paired t-test or Wilcoxon signed rank test will be used as appropriate. A statistically significant difference was set at P<0.05.
The purpose of this study is to determine whether acupuncture is effective and safe in the treatment of Primary Sjögren Syndrome.