Research Article

[Retracted] Association between the Platelet-Derived Growth Factor/Platelet-Derived Growth Factor Receptor System and Risk of Rheumatoid Arthritis: A Systematic Review and Meta-Analysis

Table 1

Characteristics of respective studies included in the meta-analysis.

AuthorYearCountryRheumatoid arthritis (RA)Control/nonarthritis (NA)CohortSampleDetectionGenePDGF/PDGFR expression (RA)PDGF/PDGFR expression (NA)

Rubin1988Sweden15520STBIHCPDGFR150
Watanabe2002Japan336STBRT-PCRPDGFRA21
Walsh2010UK101121CSMTMTPIHCPDGFB100
Charbonneau (pdgfA)2016Canada6410STBIHCPDGFA22
Charbonneau (pdgfB)2016Canada6410STBIHCPDGFB41
Charbonneau (pdgfC)2016Canada6410STBIHCPDGFC41
Charbonneau (pdgfD)2016Canada6410STBIHCPDGFD42
Matsumura2019Japan251338STBIHCPDGFRA/B155
Wang2020China494998VWBELISAPDGFB3415

VWB: venous whole blood; STB: synovial tissue biopsy; CSMTMTP: coronal section of middle third of medial tibial plateaux; ELISA: enzyme-linked immunosorbent assay; IHC: immunohistochemistry; RT-PCR: real-time polymerase chain reaction.