Methods
We searched Pubmed, Cochrane, Elsevier, Web of Science, CNKI, CQVIP, and WanFang databases (up to January 2023). In a population with pSS, the odds ratios (ORs) with 95% confidence intervals (CIs) of genotypes and each allele were provided to investigate relationships between the polymorphisms of the BAFF (TNFSF13B) gene and pSS.