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Osteoporosis International

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01-12-2012 | Original Article

Does recalled dieting increase the risk of non-vertebral osteoporotic fractures? The Tromsø Study

Authors: A. J. Søgaard, H. E. Meyer, L. A. Ahmed, L. Jørgensen, Å. Bjørnerem, R. M. Joakimsen, N. Emaus

Published in: Osteoporosis International | Issue 12/2012

Abstract

Summary

The risk of non-vertebral osteoporotic fractures increased by increasing recalled amount of weight loss when dieting in women aged ≥46 years and in those with BMI <25 kg/m² participating in the Tromsø Study (1994/1995–2009). The increased risk was present both in women with few and several episodes of recalled dieting.

Introduction

The influence of repeated dieting on bone health is uncertain. This study aims to investigate whether recalled dieting is a risk factor for non-vertebral osteoporotic fractures.

Methods

In 1994/1995 weight and height were measured in all participants aged 25–69 years in the population-based Tromsø Study. Information about socioeconomic background, diseases and lifestyle factors was collected by questionnaires—including number of recalled dieting episodes and largest amount of weight loss when dieting. The participating 20,745 women and men were followed for 15 years, fractures were registered from X-ray archives and analysed by Cox’s proportional hazards models.

Results

Among those who recalled dieting, 975 women and 364 men suffered a non-vertebral osteoporotic fracture during follow-up. Compared to women without recalled weight loss when dieting, women who reported their largest weight loss of 11 kg or more had a hazard ratio (HR) = 1.48 (95% CI 1.13–1.94) for osteoporotic fracture, adjusted for age, marital status, body mass index, height, education, physical activity, smoking, alcohol intake, history of cardiovascular disease and psychological distress. The increased risk was statistically significant only in women aged ≥46 years and in those with BMI <25 kg/m². Women who recalled ≥11 dieting episodes had HR = 1.73 (CI 1.11–2.68) for osteoporotic fracture compared to those with no recalled episodes. Dieting was not associated with risk of fractures in men, but the number of fractures was low.

Conclusions

The increased risk of non-vertebral osteoporotic fractures by recalled dieting in women indicates that maintenance of a stable weight may have beneficial effects on fracture risk.

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Title: Does recalled dieting increase the risk of non-vertebral osteoporotic fractures? The Tromsø Study
Authors: A. J. Søgaard
H. E. Meyer
L. A. Ahmed
L. Jørgensen
Å. Bjørnerem
R. M. Joakimsen
N. Emaus
Publication date: 01-12-2012
Publisher: Springer-Verlag
Published in: Osteoporosis International / Issue 12/2012
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-012-1916-y

At a glance: The STEP trials

Springer Medicine

Does recalled dieting increase the risk of non-vertebral osteoporotic fractures? The Tromsø Study

Abstract

Summary

Introduction

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Summary

Introduction

Methods

Results

Conclusions

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