Abstract
Summary
This study of postmenopausal women (n = 2,928) with an eight-year follow-up revealed that impairment in functional status associated with the increased fracture risk. The standing-on-one-foot and grip strength tests and a question about self-assessed ability to move can be used to identify women with a high risk of suffering a fracture.
Introduction
Poor functional status has pointed to associate with injurious falls and consequent fractures. Our aim was to define association between functional capacity and fractures.
Methods
This study was based on the Osteoporosis Risk Factor and Prevention Study (OSTPRE). A total of 2,928 postmenopausal women took part in the functional capacity and muscle strength tests. The duration of fracture follow-up varied from 6.43 to 9.86 (mean 8.37) years and the first fracture was the end-point event for the statistical analyses. All analyses were done with Cox-regression.
Results
A total of 261 end-point fractures occurred. In multivariate analysis the inability to stand-on-one-foot for 10 seconds increased the risk of hip fracture (hazard ratio with 95% CI) 9.11-fold (1.98–42.00). Decreased grip strength associated with 1.05-fold (1.01–1.09) increased risk of hip fractures. Low leg extension strength associated with 1.02-fold (1.00–1.03) higher risk for all fractures. The self-assessed ability to walk less than 100 meters at baseline increased the risk of ankle 2.36-fold (1.10–5.08), hip 11.57-fold (2.73–49.15) and clinical vertebral fractures 3.85-fold (1.45–10.22).
Conclusion
According to these results the standing-on-one-foot less than 10 seconds, grip strength and a question about ability to walk less than 100 meters may help to predict postmenopausal fractures.
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Acknowledgements
We thank Mr. Vesa Kiviniemi for statistical advice, Ms. Seija Oinonen for technical support and Mr. Ewen Macdonald for linguistic form check. This study was supported by the Academy of Finland grant 113999, EVO grant of the Kuopio University Hospital and the Sigrid Juselius Foundation.
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Kärkkäinen, M., Rikkonen, T., Kröger, H. et al. Association between functional capacity tests and fractures: An eight-year prospective population-based cohort study. Osteoporos Int 19, 1203–1210 (2008). https://doi.org/10.1007/s00198-008-0561-y
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DOI: https://doi.org/10.1007/s00198-008-0561-y