Sjögren's disease & overlap diseases

Causal associations of Sjögren’s syndrome with cancers: a two-sample Mendelian randomization study

Arthritis Res TherPublished Two-sample Mendelian randomization study

Authors' conclusion

SS had significant causal relationships with lymphomas, prostate cancer, and endometrial cancer, and suggestive evidence of association was found in liver and bile duct cancer and cancer of urinary tract, indicating that SS may play a vital role in the incidence of these malignancies.

Study context

Population
European population; GWAS summary statistics, sample size 1080 to 372,373sample size 1080 to 372,373
Comparison
Genetically predicted Sjögren's syndrome (SS) vs nine types of cancers
Outcome
Causal effect of SS on nine types of cancers (IVW)
Methodological detailspublic GWAS summary statistics, European population, inverse variance weighted (IVW) method, Bonferroni-corrected threshold P < 0.0031, sensitivity analysis
  • Public GWAS summary statistics, European population
  • IVW method
  • Bonferroni-corrected threshold P < 0.0031
  • Sensitivity analysis

Main finding

As reported in the abstract

Causal effect of SS on cancers (IVW)
SSEstimate (95% CI)P value
Increased risk
OR (lymphomas) 1.0010(1.0005–1.0015)
P = 0.0002
Reduced risk
OR (prostate cancer) 0.9972(0.9960–0.9985)
P = 2.45 × 10-5
Reduced risk
OR (endometrial cancer) 0.9414(0.9158–0.9676)
P = 1.65 × 10-5
Suggestive association
OR (liver and bile duct cancer) 0.9999(0.9997–1.0000)
P = 0.0291
Suggestive association
OR (cancer of urinary tract) 0.9996(0.9992–1.0000)
P = 0.0281

Further findings

Mediation by well-accepted cancer risk factors

Causal effects between SS and cancers not mediated by well-accepted risk factors of cancers

Reverse direction: cancers on SS

No evidence of causal relationship for cancers on SS

Original publication

Causal associations of Sjögren’s syndrome with cancers: a two-sample Mendelian randomization study. Arthritis Res Ther. Published 15 September 2023. doi:10.1186/s13075-023-03157-w

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