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Association of tirzepatide use with risk of osteoporosis compared with other GLP-1 receptor agonists: A retrospective
Yung-Han Hsu1, Yu-Cheng Liang2, Ka-Chon Chan1
1Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Aims:
To determine whether tirzepatide use is associated with a higher risk of osteoporosis or fragility fractures compared with other glucagon-like peptide-1 receptor agonists (GLP-1 RAs).
Methods:
In a retrospective cohort study using the TriNetX network, we identified 459,886 eligible patients with type 2 diabetes or obesity who initiated tirzepatide or other GLP-1 RAs between June 2022 and May 2024. We performed 1:1 propensity score matching to balance baseline characteristics. The primary outcome was a composite of new-onset osteoporosis or fragility fracture, assessed within a 14-month follow-up period.
Results:
The matched study included 66,329 participants per group. Compared with other GLP-1 RAs, tirzepatide was associated with a higher risk of the primary outcome (hazard ratio [HR], 1.44; 95 % confidence interval [CI], 1.22-1.69) and of initiating osteoporosis therapy (HR, 1.61; 95 % CI, 1.22-2.12). Compared with the nonusers, tirzepatide users were associated with a significantly higher risk of the primary composite outcome of osteoporosis or fragility fracture (HR, 1.48; 95 % CI, 1.26-1.75) but not with other GLP-1 RAs (HR, 1.07; 95 % CI, 1.00-1.15).
Conclusions:
In this large real-world cohort study, initiation of tirzepatide was associated with a significantly higher risk of osteoporosis or fragility fractures compared to other GLP-1 RAs.
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