Type 2 & other diabetes

Sodium-glucose cotransporter-2 inhibitors and risk of autoimmune rheumatic diseases: population based cohort study

BMJPublished Retrospective cohort study

Authors' conclusion

In this large cohort of adults with type 2 diabetes, SGLT-2 inhibitors were associated with an 11% lower risk of autoimmune rheumatic diseases compared with sulfonylureas.

Study context

Population
Adults aged ≥18 years with type 2 diabetes, nationwide healthcare database in South Korea, 2012–22
Participants
2,032,157 adults
Exposure
SGLT-2 inhibitors vs sulfonylureas
  • SGLT-2 inhibitorsn = 552,065
  • Sulfonylureasn = 1,480,092reference
Outcome
Autoimmune rheumatic disease, defined using a validated algorithm incorporating diagnostic codes and registration in a disease specific nationwide programme
Methodological detailspopulation based, nationwide healthcare database, normalised inverse probability treatment weighting based on propensity score
  • Population based
  • Nationwide healthcare database
  • Normalised inverse probability treatment weighting based on propensity score

Main finding

As reported in the abstract

Incident autoimmune rheumatic diseases · median of nine months' follow-up
Each group vs sulfonylureasHazard ratio (95% CI)
SGLT-2 inhibitors
0.89(0.81–0.98)
Each group vs sulfonylureasRate difference, per 100 000 person years (95% CI)
SGLT-2 inhibitors
−6.50(−11.86 to −1.14)

Observational data: associations, not effects.

Secondary outcomes

ARD in subgroups (age, sex, type of SGLT-2 inhibitor, baseline CVD, obesity status)

Findings overall consistent among subgroups stratified by age, sex, type of SGLT-2 inhibitor, baseline CVD and obesity status

Genital infections (positive control outcome)

HR (95% CI) for genital infections, SGLT-2 inhibitors vs sulfonylureas
2.78 (2.72 to 2.83)
  • Positive control outcome to evaluate residual confounding

Herpes zoster (negative control outcome)

HR (95% CI) for herpes zoster, SGLT-2 inhibitors vs sulfonylureas
1.03 (1.01 to 1.05)
  • Negative control outcome to evaluate residual confounding

Original publication

Sodium-glucose cotransporter-2 inhibitors and risk of autoimmune rheumatic diseases: population based cohort study. BMJ. Published 15 October 2025. doi:10.1136/bmj-2025-085196

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