Table 2.

Subgroup analysis of the association between RA and SD.

VariablesNo. StudiesHeterogeneityRR (95% CI)p
I2, %p
Study design< 0.001
  Cross-sectional430.50.2301.61 (1.23–2.10)
  Case-control383.10.0031.94 (1.38–2.74)
Age, yrs< 0.001
  < 4520.00.5063.30 (2.11–5.14)
  ≥ 4540.00.9331.47 (1.29–1.68)
Mean disease duration, yrs< 0.001
  < 820.00.5711.50 (1.17–1.92)
  ≥ 8287.90.0042.03 (0.97–4.25)
  • RA: rheumatoid arthritis; SD: sexual dysfunction; RR: relative risk.