Adjusting conventional FRAX estimates of fracture probability according to the recency of sentinel fractures

Autoři: Lorentzon A. Kanis H. Johansson N. C. Harvey V. Gudnason G. Sigurdsson K. Siggeirsdottir M. J. 1,2 1,2 3,4 5,6 5 5 1,7;  Mccloskey Liu L. Vandenput E. V. E. 1 1,8 2,9
Působiště autorů: Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia 1;  Centre for Metabolic Bone Diseases, University of Sheffield Medical School, Beech Hill Road, Sheffield S10 2RX, UK 2;  MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK 3;  NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK 4;  Icelandic Heart Association Research Institute, Kopavogur, Iceland 5;  University of Iceland, Reykjavik, Iceland 6;  Geriatric Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden 7;  Department of Internal Medicine and Clinical Nutrition, Institute of Medicine and Clinical Nutrition, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden 8;  Mellanby Centre for bone research, Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK 9
Vyšlo v časopise: Clinical Osteology 2020; 25(4): 177-188
Kategorie: Doporučené postupy


Summary The risk of a recurrent fragility fracture is particularly high immediately following the fracture. This study provides adjustments to FRAX-based fracture probabilities accounting for the site of a recent fracture.

Introduction The recency of prior fractures affects subsequent fracture risk. The aim of this study was to quantify the effect of a recent sentinel fracture, by site, on the 10-year probability of fracture determined with FRAX.

Methods The study used data from the Reykjavik Study fracture register that documented prospectively all fractures at all skeletal sites in a large sample of the population of Iceland. Fracture probabilities were determined after a sentinel fracture (humeral, clinical vertebral, forearm and hip fracture) from the hazards of death and fracture. Fracture probabilities were computed on the one hand for sentinel fractures occurring within the previous 2 years and on the other hand, probabilities for a prior osteoporotic fracture irrespective of recency. The probability ratios provided adjustments to conventional FRAX estimates of fracture probability for recent sentinel fractures.

Results Probability ratios to adjust 10-year FRAX probabilities of a major osteoporotic fracture for recent sentinel fractures were age dependent, decreasing with age in both men and women. Probability ratios varied according to the site of sentinel fracture with higher ratios for hip and vertebral fracture than for humerus or forearm fracture. Probability ratios to adjust 10-year FRAX probabilities of a hip fracture for recent sentinel fractures were also age dependent, decreasing with age in both men and women with the exception of forearm fractures.

Conclusion The probability ratios provide adjustments to conventional FRAX estimates of  fracture  probability  for recent sentinel fractures.

Klíčová slova:

Fracture probability – FRAX adjustment – Imminent risk – Prior fracture – Risk assessment – Sentinel fracture


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