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Comparison of the efficacy between once-monthly oral ibandronate and risedronate among Korean women with osteoporosis: a nationwide population-based study

  • Dong Ryul Lee
  • Jungun Lee
Original Article
  • 2 Downloads

Abstract

Summary

Using a nationwide database from the Korean National Health Insurance Service, this study showed that once-monthly oral ibandronate (150 mg) had better anti-fracture efficacy than once-monthly oral risedronate (150 mg), as seen on assessing overall and non-vertebral fractures among Korean elderly women with osteoporosis.

Introduction

Once-monthly oral bisphosphonates have been used widely without appropriate comparison. Therefore, we aimed to compare the anti-fracture efficacy of once-monthly ibandronate (150 mg) and once-monthly risedronate (150 mg).

Methods

We conducted a retrospective cohort study among Korean women aged ≥ 60 years from 2006 to 2015 using a nationwide database from the National Health Insurance Service Senior Cohort. The primary outcome was the first occurrence of fracture related to osteoporosis after the initial prescription of bisphosphonates. A Cox proportional model was used to estimate the incidence rate ratios (IRRs) and 95% confidence intervals (CIs) for overall and site-specific fractures between the two treatments, after adjusting for possible confounding factors.

Results

After propensity score matching, the ibandronate and risedronate groups, with 3454 patients each, were assembled from 36,701 new once-monthly ibandronate or risedronate users. After 4 years of follow-up, the ibandronate group had significantly lower incidence rates of overall and non-vertebral fractures than the risedronate group (IRR 0.822, 95% CI 0.698–0.968, P = 0.919 and IRR 0.798, 95% CI 0.647–0.985, P = 0.036, respectively).

Conclusions

Once-monthly ibandronate (150 mg) shows better anti-fracture efficacy than once-monthly risedronate (150 mg). However, further large-scale studies are required to confirm our findings and to determine site-specific differences, especially regarding the vertebral and hip areas.

Keywords

Bisphosphonate Fracture Ibandronate Osteoporosis Risedronate 

Notes

Funding information

This study was supported by Wonkwang University in 2017.

Compliance with ethical standards

Conflicts of interest

None.

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Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2018

Authors and Affiliations

  1. 1.Department of Family Medicine, Wonkwang University School of MedicineWonkwang University Sanbon HospitalGunpo-siRepublic of Korea

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