Osteoporosis International

, Volume 23, Issue 11, pp 2681–2692

Vitamin K supplementation for the primary prevention of osteoporotic fractures: is it cost-effective and is future research warranted?

  • O. Gajic-Veljanoski
  • A. M. Bayoumi
  • G. Tomlinson
  • K. Khan
  • A. M. Cheung
Original Article

DOI: 10.1007/s00198-012-1939-4

Cite this article as:
Gajic-Veljanoski, O., Bayoumi, A.M., Tomlinson, G. et al. Osteoporos Int (2012) 23: 2681. doi:10.1007/s00198-012-1939-4

Abstract

Summary

Lifetime supplementation with vitamin K, vitamin D3, and calcium is likely to reduce fractures and increase survival in postmenopausal women. It would be a cost-effective intervention at commonly used thresholds, but high uncertainty around the cost-effectiveness estimates persists. Further research on the effect of vitamin K on fractures is warranted.

Introduction

Vitamin K might have a role in the primary prevention of fractures, but uncertainties about its effectiveness and cost-effectiveness persist.

Methods

We developed a state-transition probabilistic microsimulation model to quantify the cost-effectiveness of various interventions to prevent fractures in 50-year-old postmenopausal women without osteoporosis. We compared no supplementation, vitamin D3 (800 IU/day) with calcium (1,200 mg/day), and vitamin K2 (45 mg/day) with vitamin D3 and calcium (at the same doses). An additional analysis explored replacing vitamin K2 with vitamin K1 (5 mg/day).

Results

Adding vitamin K2 to vitamin D3 with calcium reduced the lifetime probability of at least one fracture by 25%, increased discounted survival by 0.7 quality-adjusted life-years (QALYs) (95% credible interval (CrI) 0.2; 1.3) and discounted costs by $8,956, yielding an incremental cost-effectiveness ratio (ICER) of $12,268/QALY. At a $50,000/QALY threshold, the probability of cost-effectiveness was 95% and the population expected value of perfect information (EVPI) was $28.9 billion. Adding vitamin K1 to vitamin D and calcium reduced the lifetime probability of at least one fracture by 20%, increased discounted survival by 0.4 QALYs (95% CrI −1.9; 1.4) and discounted costs by $4,014, yielding an ICER of $9,557/QALY. At a $50,000/QALY threshold, the probability of cost-effectiveness was 80% while the EVPI was $414.9 billion. The efficacy of vitamin K was the most important parameter in sensitivity analyses.

Conclusions

Lifetime supplementation with vitamin K, vitamin D3, and calcium is likely to reduce fractures and increase survival in postmenopausal women. Given high uncertainty around the cost-effectiveness estimates, further research on the efficacy of vitamin K on fractures is warranted.

Keywords

Cost-effectiveness Expected value of perfect information (EVPI) Fracture prevention Postmenopausal Vitamin K 

Supplementary material

198_2012_1939_MOESM1_ESM.pdf (357 kb)
ESM 1(PDF 357 kb)

Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2012

Authors and Affiliations

  • O. Gajic-Veljanoski
    • 1
    • 2
  • A. M. Bayoumi
    • 1
    • 3
    • 4
  • G. Tomlinson
    • 1
    • 3
  • K. Khan
    • 1
    • 3
    • 4
  • A. M. Cheung
    • 1
    • 2
    • 3
  1. 1.Department of Health Policy, Management and EvaluationUniversity of TorontoTorontoCanada
  2. 2.Osteoporosis Program, University Health Network/TorontoRehabilitation Institute/Mount Sinai HospitalTorontoCanada
  3. 3.Department of MedicineUniversity of TorontoTorontoCanada
  4. 4.Centre for Research on Inner City HealthThe Keenan Research Centre in the Li Ka Shing Knowledge Institute, St. Michael’s HospitalTorontoCanada

Personalised recommendations