The authors have no conflict of interest
ApoE Gene Polymorphisms, BMD, and Fracture Risk in Elderly Men and Women: The Rotterdam Study†
Article first published online: 21 JUN 2004
Copyright © 2004 ASBMR
Journal of Bone and Mineral Research
Volume 19, Issue 9, pages 1490–1496, September 2004
How to Cite
Schoofs, M. W., van der Klift, M., Hofman, A., van Duijn, C. M., Stricker, B. H., Pols, H. A. and Uitterlinden, A. G. (2004), ApoE Gene Polymorphisms, BMD, and Fracture Risk in Elderly Men and Women: The Rotterdam Study. J Bone Miner Res, 19: 1490–1496. doi: 10.1359/JBMR.040605
- Issue published online: 2 DEC 2009
- Article first published online: 21 JUN 2004
- Manuscript Accepted: 19 FEB 2004
- Manuscript Revised: 21 OCT 2003
- Manuscript Received: 12 AUG 2003
- apolipoprotein E
To study the association between the ApoE gene polymorphism and osteoporosis, we performed an association study in 5857 subjects from the Rotterdam Study. We did not observe an association between the ApoE polymorphism and osteoporosis in this study, which is thus far the largest study on ApoE and osteoporosis.
Introduction: The E4 allele of the E2, E3, E4 protein isoform polymorphism in the gene encoding apolipoprotein E (ApoE) has previously been associated with an increased fracture risk. We investigated the association between the ApoE polymorphism and BMD, bone loss, and incident fractures as part of the Rotterdam Study a prospective population-based cohort study of diseases in the elderly.
Materials and Methods: The study population consisted of 5857 subjects (2560 men; 3297 women) for whom data on ApoE genotypes, confounding variables, and follow-up of nonvertebral fractures were available. Data on femoral neck and lumbar spine BMD were available for 4814 participants. Genotype analyses for bone loss (defined as annualized percent change in BMD at the hip and lumbar spine) and BMD were performed using ANOVA. Fractures were analyzed using a Cox proportional-hazards model and logistic regression. All relative risks were adjusted for age and body mass index.
Results and Conclusions: The genotype distribution of the study population was in Hardy-Weinberg equilibrium (p = 0.98) and did not differ by gender. At baseline, mean BMD of the lumbar spine and femoral neck did not differ between the ApoE genotypes of men and women. Bone loss (mean follow-up, 2.0 years) did not differ by ApoE genotype for women and men. During a mean follow-up of 6.6 years, 708 nonvertebral fractures (198 hip fractures and 179 wrist fractures) and 149 incident vertebral fractures occurred. No consistent differences in the distribution of alleles could be observed between subjects with or without these fractures. Our data do not support the hypothesis that the ApoE4 risk allele is associated with BMD, increased bone loss, or an increased risk of osteoporotic fractures.