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Prevalent vertebral fractures predict subsequent radiographic vertebral fractures in postmenopausal Korean women receiving antiresorptive agent

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Abstract

Summary

The relationship between prevalent vertebral fractures and new vertebral fractures in Korean women has not been previously studied. We found that prevalent vertebral fracture is a strong risk factor for subsequent radiographic vertebral fracture, independent of age and spine bone mineral density (BMD) in postmenopausal Korean women receiving antiresorptive agents.

Introduction

The presence of prevalent vertebral fractures increases the risk of subsequent vertebral fractures. This observational study examined whether prevalent vertebral fractures influenced future incident vertebral fracture in postmenopausal women receiving antiresorptive treatment.

Methods

Using the medical records, we retrospectively assessed 1,200 postmenopausal women who had visited the osteoporosis clinic. Among them, we selected patients whose BMD was measured at least once a year for 3 years. We excluded patients whose lateral spine X-ray film at baseline or follow-up period was missing, which is the key assessment. In the end, we analyzed 666 postmenopausal women. The mean duration of follow-up period was 3.2 years.

Results

The majority of patients (83%) received bisphosphonates or raloxifene during the mean duration of 3.2 years. Fifty-five of the 666 women had new incident radiographic vertebral fractures during the follow-up period. Prevalent vertebral fractures were associated with a five-fold increased risk (odd ratio 5.7, 95% CI 3.09–10.74) of incident vertebral fractures after adjusting for age. These associations remained significant after the adjustment for multiple confounding factors (odd ratio 4.4, 95% CI 1.97–9.75). The risk of incident vertebral fracture increased with the number of prevalent vertebral fractures at baseline: 3.4 (95% CI 1.54–7.70) for those with a single fracture and 7.4 (95% CI 3.10–17.54) for those with two or more after adjustment for age and spine BMD.

Conclusions

We confirmed that prevalent vertebral fracture is a strong risk factor for new vertebral fractures, independent of age and spine BMD in postmenopausal Korean women receiving antiresorptive agents.

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Authors and Affiliations

  1. Division of Endocrinology, Department of Internal Medicine, Kwandong University College of Medicine, Myongji Hospital, Goyang, South Korea

    S. H. Kim

  2. Division of Endocrinology, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, South Korea

    H. S. Choi

  3. Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, Seoul, 120-752, South Korea

    Y. Rhee, K. J. Kim & S.-K. Lim

  4. Brain Korea 21 Project for Medical Sciences, Yonsei University, Seoul, South Korea

    S.-K. Lim

  5. Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea

    S.-K. Lim

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  1. S. H. Kim
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  2. H. S. Choi
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  3. Y. Rhee
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  4. K. J. Kim
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  5. S.-K. Lim
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Correspondence to S.-K. Lim.

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Kim, S.H., Choi, H.S., Rhee, Y. et al. Prevalent vertebral fractures predict subsequent radiographic vertebral fractures in postmenopausal Korean women receiving antiresorptive agent. Osteoporos Int 22, 781–787 (2011). https://doi.org/10.1007/s00198-010-1298-y

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  • DOI: https://doi.org/10.1007/s00198-010-1298-y

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