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A Population-Based Study of SGLT2 Inhibitor-Associated Postoperative Diabetic Ketoacidosis in Patients with Type 2 Diabetes

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Abstract

Introduction and Objectives

Operations are a major precipitating factor for sodium-glucose co-transporter 2 inhibitor (SGLT2i)-associated diabetic ketoacidosis (DKA). This study aimed to investigate the risks of SGLT2i-associated postoperative DKA.

Methods

We analysed a population-based cohort of patients with type 2 diabetes who underwent operations during 2015–2020. Patients with SGLT2i prescriptions within 6 months before operations were assigned to the SGLT2i group, while others were assigned to the control group. Inverse probability treatment weighting with propensity scores was used to balance the baseline covariates. Postoperative DKA was defined as DKA within 30 days postoperatively.

Results

Overall, 147,115 subjects were included (3,419 SGLT2i users; 143,696 controls). Preoperative SGLT2i exposure was associated with increased risks of postoperative DKA (incidence = 6.40/1,000 person-years; incidence rate ratio [IRR] 6.33, 95% confidence interval [CI] 5.57–7.18; p < 0.001). Risk factors of SGLT2i-associated postoperative DKA included emergency operation (IRR 24.56, 95% CI 7.42–81.24; p < 0.001), preoperative HbA1c ≥8% (IRR 3.10, 95% CI 1.31–7.33; p = 0.010) and insulin use (IRR 2.88, 95% CI 1.27–6.51; p = 0.011). SGLT2i users who developed postoperative DKA had worse outcomes (invasive mechanical ventilation, dialysis, infections/sepsis, intensive care, and length of hospitalization; p < 0.05) than those who did not, although SGLT2i users who developed postoperative DKA had better outcomes than non-SGLT2i users who developed postoperative DKA (p < 0.05). The risk of postoperative DKA decreased following the implementation of an automatic electronic health record pop-up alert on perioperative precaution regarding SGLT2i (from IRR 4.06 [95% CI 3.41–4.83] to 2.97 [95% CI 2.41–3.65]; p for interaction = 0.020).

Conclusions

Preoperative SGLT2i use was associated with increased risks of postoperative DKA in patients with type 2 diabetes. Clinicians could optimize patients’ outcomes by appropriate prescription of SGLT2i, while watching out for high-risk features. Implementing automatic electronic health record pop-up alerts may reduce the risk of SGLT2i-associated postoperative DKA.

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Acknowledgements

The authors would like to thank Hong Kong Hospital Authority for data provision, and Mr Franco Cheng for his input regarding details of the implementation of the alert about SGLT2 inhibitors.

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Authors

Corresponding author

Correspondence to Carlos King Ho Wong.

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Funding

Not applicable. The authors of this study received no financial support.

Conflicts of interest

David T.W. Lui, Tingting Wu, Ivan C.H. Au, Xiaodong Liu, Matrix M.H. Fung, Chi Ho Lee, Carol H.Y. Fong, Yu Cho Woo, Brian H.H. Lang, Kathryn C.B. Tan, and Carlos K.H. Wong have declared no conflicts of interest.

Ethics approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethics approval of this study was granted by the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (reference no. UW 21-320).

Consent to participate

Not applicable, as individuals were analysed anonymously and cannot be identified.

Consent to publication

Not applicable, as individuals were analysed anonymously and cannot be identified.

Availability of data and materials

The data that support the findings of this study are available from Hong Kong Hospital Authority but restrictions apply to the availability of these data, which were used under licence for the current study, and therefore are not publicly available. Data are however available from the authors upon reasonable request and with permission of Hong Kong Hospital Authority.

Code availability

Not available.

Author contributions

DTWL: Conceived the research idea, drafted the paper. TW: Conducted statistical analysis, drafted the paper. ICHA: Data management and reviewed the paper. XL: Data management and reviewed the paper. MMHF: Reviewed and validated the paper. CHL: Assisted data collection. YCW: Reviewed and validated the paper. BHHL: Reviewed and validated the paper. KCBT: Reviewed and validated the paper. CKHW: Conceived the research idea, data collection, supervised the project, and reviewed the paper. All authors read and approved the final version.

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Lui, D.T.W., Wu, T., Au, I.C.H. et al. A Population-Based Study of SGLT2 Inhibitor-Associated Postoperative Diabetic Ketoacidosis in Patients with Type 2 Diabetes. Drug Saf 46, 53–64 (2023). https://doi.org/10.1007/s40264-022-01247-3

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