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Alcohol intake as a risk factor for fracture
Authors:John A Kanis  Helena Johansson  Olof Johnell  Anders Oden  Chris De Laet  John A Eisman  Huibert Pols  Alan Tenenhouse
Institution:(1) WHO Collaborating Centre for Metabolic Bone Diseases, University of Sheffield Medical School, Beech Hill Road, Sheffield, S10 2RX, UK;(2) Consulting Statistician, Gothenburg, Sweden;(3) Department of Orthopaedics, Malmo General Hospital, S-214 01 Malmo, Sweden;(4) Department of Public Health, Erasmus Medical Center, 3000 DR Rotterdam, The Netherlands;(5) Bone and Mineral Research Program, Garvan Institute of Medical Research, St Vincentrsquos Hospital and University of NSW, Sydney, Australia;(6) Department of Internal Medicine, Erasmus University, Rotterdam, The Netherlands;(7) Division of Bone Metabolism, The Montreal General Hospital, Montreal, Canada
Abstract:High intakes of alcohol have adverse effects on skeletal health, but evidence for the effects of moderate consumption are less secure. The aim of this study was to quantify this risk on an international basis and explore the relationship of this risk with age, sex, and bone mineral density (BMD). We studied 5,939 men and 11,032 women from three prospectively studied cohorts comprising CaMos, DOES, and the Rotterdam Study. Cohorts were followed for a total of 75,433 person-years. The effect of reported alcohol intake on the risk of any fracture, any osteoporotic fracture, and hip fracture alone was examined using a Poisson model for each sex from each cohort. Covariates examined included age and BMD. The results of the different studies were merged using weighted beta-coefficients. Alcohol intake was associated with a significant increase in osteoporotic and hip fracture risk, but the effect was nonlinear. No significant increase in risk was observed at intakes of 2 units or less daily. Above this threshold, alcohol intake was associated with an increased risk of any fracture (risk ratio RR]=1.23; 95% CI, 1.06–1.43), any osteoporotic fracture (RR=1.38; 95% CI, 1.16–1.65), or hip fracture (RR=1.68; 95% CI, 1.19–2.36). There was no significant interaction with age, BMD, or time since baseline assessment. Risk ratios were moderately but not significantly higher in men than in women, and there was no evidence for a different threshold for effect by gender. We conclude that reported intake of alcohol confers a risk of some importance beyond that explained by BMD. The validation of this risk factor on an international basis permits its use in case-finding strategies.
Keywords:Alcohol  Hip fracture  Meta-analysis  Osteoporotic fracture  Risk factors
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