Abstract
Introduction
We aimed to clarify the risks of initiating antidiabetic drugs for fractures using a nationwide health insurance claims database (NDBJ).
Materials and Methods
Patients aged ≥ 65 years initiating antidiabetic drugs at the outpatient department were enrolled after a 180-day period without prescribed antidiabetic drugs and followed with during 2012–2018 using NDBJ. The adjusted hazard risks (HRs) of each antidiabetic drug (thiazolidine, alpha-glucosidase inhibitor, dipeptidyl peptidase-4 [DPP-4] inhibitor, sulfonylurea, glinide, and insulin) for fractures compared with biguanide were obtained adjusting for age, gender, polypharmacy, dementia, and the other antidiabetic drugs.
Results
The DPP-4 inhibitor was the most often prescribed antidiabetic drug followed by biguanide with prescribed proportions of 71.7% and 12.9%. A total of 4,304 hip fractures and 9,388 vertebral fractures were identified among the 966,700 outpatient participants. Compared with biguanide, insulin, alpha-glucosidase inhibitor, and DPP-4 inhibitor were related to increased hip fracture risks. Vertebral fracture risk was higher in outpatients prescribed with insulin, thiazolidine, and DPP-4 inhibitor compared with biguanide. Patients prescribed insulin for hip and vertebral fractures’ adjusted HRs were 2.17 (95% CI 1.77–2.66) and 1.45 (95% CI 1.24–1.70), respectively. Those prescribed DPP-4 inhibitor for hip and vertebral fractures’ adjusted HRs were 1.27 (95% CI 1.15–1.40) and 1.20 (95% CI 1.12–1.28), respectively.
Conclusions
Initiating insulin increased the risk of not only hip fractures but also vertebral fractures. Patients initiating antidiabetic drugs had increased risks of hip and vertebral fractures compared with those initiating biguanide independently for age, gender, polypharmacy, and dementia in the Japanese elderly.
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Acknowledgements
The authors thank the personnel of the Osteoporosis Foundation to support the present study. Sources of funding for the present article were as follows: a 52nd Taiju Life Social Welfare Foundation Medical Research Grant 2019, a Japan Osteoporosis Foundation Grant for Bone Research 2019, and a 28th Pfizer Health Research Grant 2019. The funding bodies had no role in either designing the study, collecting and analyzing the, or interpreting the findings, writing the manuscript, or choosing the journal to submit the manuscript.
Funding
Taiju Life Social Welfare Foundation,a 52nd Taiju Life Social Welfare Foundation Medical Research Grant 2019,Junko Tamaki,Japan Osteoporosis Foundation,a Japan Osteoporosis Foundation Grant for Bone Research 2019,Junko Tamaki,Pfizer Japan,a 28th Pfizer Health Research Grant 2019,Junko Tamaki
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JT got funding, designed a research question, analyzed the data, and made the original draft of the manuscript. SO conceptualized the study, and reviewed the manuscript. KF conceptualized and supervised the study, made the dataset, and reviewed the manuscript. SI administered the study project, and reviewed the manuscript. SN and NO conceptualized the study and reviewed the manuscript. KK reviewed the manuscript. MI planned the study project, conceptualized and supervised the study, and reviewed the manuscript.
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Shigeyuki Ishii has received written manuscripts fees for Asahi Kasei Pharma Ltd. and honorarium from Teijin Pharma Ltd.. Shinichi Nakatoh has received payments for lectures, speakers’ bureau fees from Asahi-Kasei Pharmaceutical Co. Ltd., Amgen K. K. and Astellas Pharma Inc.. Nobukazu Okimoto has received honoraria for lectures from Asahi-Kasei Pharmaceutical Co. Ltd., Amgen Astellas Biopharma K.K., Astellas Pharma Inc., Chugai Pharmaceutical Co., Daiichi-Sankyo Co. Ltd., Eisai Co. Ltd., Eli Lilly Japan, and Teijin Pharma Ltd.. Junko Tamaki, Sumito Ogawa, Kenji Fujimori, Kuniyasu Kamiya and Masayuki Iki declare that they have no conflicts of interest.
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Tamaki, J., Ogawa, S., Fujimori, K. et al. Hip and vertebral fracture risk after initiating antidiabetic drugs in Japanese elderly: a nationwide study. J Bone Miner Metab 41, 29–40 (2023). https://doi.org/10.1007/s00774-022-01372-0
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DOI: https://doi.org/10.1007/s00774-022-01372-0