Tags

Type your tag names separated by a space and hit enter

Seasonal periodicity of serum vitamin D and parathyroid hormone, bone resorption, and fractures: the Geelong Osteoporosis Study.
J Bone Miner Res. 2004 May; 19(5):752-8.JB

Abstract

In this population-based study, seasonal periodicity was seen with reduced serum vitamin D, increased serum PTH, and increased bone resorption in winter. This was associated with an increased proportion of falls resulting in fracture and an increased risk of wrist and hip fractures.

INTRODUCTION

In a population of women who reside in a temperate climate and do not generally receive dietary vitamin D supplementation, we investigated whether seasonal vitamin D insufficiency is associated with increased risk of fracture.

MATERIALS AND METHODS

An observational, cross-sectional, population-based study set in southeastern Australia (latitude 38-39 degrees S). Participants were drawn from a well-defined community of 27,203 women >/=55 years old: 287 randomly selected from electoral rolls, 1635 with incident fractures, and 1358 presenting to a university hospital with falls. The main outcome measures were annual periodicities of ultraviolet radiation, serum 25-hydroxyvitamin D [25(OH)D], serum parathyroid hormone (PTH), serum C-telopeptide (CTx), BMD, falls, and fractures.

RESULTS

Cyclic variations in serum 25(OH)D lagged 1 month behind ultraviolet radiation, peaking in summer and dipping in winter (p < 0.001). Periodicity of serum PTH was the inverse of serum 25(OH)D, with a phase shift delay of 1 month (p = 0.004). Peak serum CTx lagged peak serum PTH by 1-2 months. In late winter, a greater proportion of falls resulted in fracture (p < 0.001). Seasonal periodicity in 439 hip and 307 wrist fractures also followed a simple harmonic model (p = 0.078 and 0.002, respectively), peaking 1.5-3 months after the trough in 25(OH)D.

CONCLUSIONS

A fall in 25(OH)D in winter is accompanied by increases in (1) PTH levels, (2) bone resorption, (3) the proportion of falls resulting in fracture, and (4) the frequency of hip and wrist fracture. Whether vitamin D supplementation in winter can reduce the population burden of fractures requires further investigation.

Authors+Show Affiliations

Department of Clinical and Biomedical Sciences: Barwon Health, The University of Melbourne, Geelong, Victoria, Australia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15068498

Citation

Pasco, Julie A., et al. "Seasonal Periodicity of Serum Vitamin D and Parathyroid Hormone, Bone Resorption, and Fractures: the Geelong Osteoporosis Study." Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research, vol. 19, no. 5, 2004, pp. 752-8.
Pasco JA, Henry MJ, Kotowicz MA, et al. Seasonal periodicity of serum vitamin D and parathyroid hormone, bone resorption, and fractures: the Geelong Osteoporosis Study. J Bone Miner Res. 2004;19(5):752-8.
Pasco, J. A., Henry, M. J., Kotowicz, M. A., Sanders, K. M., Seeman, E., Pasco, J. R., Schneider, H. G., & Nicholson, G. C. (2004). Seasonal periodicity of serum vitamin D and parathyroid hormone, bone resorption, and fractures: the Geelong Osteoporosis Study. Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research, 19(5), 752-8.
Pasco JA, et al. Seasonal Periodicity of Serum Vitamin D and Parathyroid Hormone, Bone Resorption, and Fractures: the Geelong Osteoporosis Study. J Bone Miner Res. 2004;19(5):752-8. PubMed PMID: 15068498.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seasonal periodicity of serum vitamin D and parathyroid hormone, bone resorption, and fractures: the Geelong Osteoporosis Study. AU - Pasco,Julie A, AU - Henry,Margaret J, AU - Kotowicz,Mark A, AU - Sanders,Kerrie M, AU - Seeman,Ego, AU - Pasco,John R, AU - Schneider,Hans G, AU - Nicholson,Geoffrey C, Y1 - 2004/01/19/ PY - 2003/09/05/received PY - 2003/10/27/revised PY - 2004/01/16/accepted PY - 2004/4/8/pubmed PY - 2004/8/4/medline PY - 2004/4/8/entrez SP - 752 EP - 8 JF - Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research JO - J. Bone Miner. Res. VL - 19 IS - 5 N2 - UNLABELLED: In this population-based study, seasonal periodicity was seen with reduced serum vitamin D, increased serum PTH, and increased bone resorption in winter. This was associated with an increased proportion of falls resulting in fracture and an increased risk of wrist and hip fractures. INTRODUCTION: In a population of women who reside in a temperate climate and do not generally receive dietary vitamin D supplementation, we investigated whether seasonal vitamin D insufficiency is associated with increased risk of fracture. MATERIALS AND METHODS: An observational, cross-sectional, population-based study set in southeastern Australia (latitude 38-39 degrees S). Participants were drawn from a well-defined community of 27,203 women >/=55 years old: 287 randomly selected from electoral rolls, 1635 with incident fractures, and 1358 presenting to a university hospital with falls. The main outcome measures were annual periodicities of ultraviolet radiation, serum 25-hydroxyvitamin D [25(OH)D], serum parathyroid hormone (PTH), serum C-telopeptide (CTx), BMD, falls, and fractures. RESULTS: Cyclic variations in serum 25(OH)D lagged 1 month behind ultraviolet radiation, peaking in summer and dipping in winter (p < 0.001). Periodicity of serum PTH was the inverse of serum 25(OH)D, with a phase shift delay of 1 month (p = 0.004). Peak serum CTx lagged peak serum PTH by 1-2 months. In late winter, a greater proportion of falls resulted in fracture (p < 0.001). Seasonal periodicity in 439 hip and 307 wrist fractures also followed a simple harmonic model (p = 0.078 and 0.002, respectively), peaking 1.5-3 months after the trough in 25(OH)D. CONCLUSIONS: A fall in 25(OH)D in winter is accompanied by increases in (1) PTH levels, (2) bone resorption, (3) the proportion of falls resulting in fracture, and (4) the frequency of hip and wrist fracture. Whether vitamin D supplementation in winter can reduce the population burden of fractures requires further investigation. SN - 0884-0431 UR - https://www.unboundmedicine.com/medline/citation/15068498/Seasonal_periodicity_of_serum_vitamin_D_and_parathyroid_hormone_bone_resorption_and_fractures:_the_Geelong_Osteoporosis_Study_ L2 - https://doi.org/10.1359/JBMR.040125 DB - PRIME DP - Unbound Medicine ER -