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Long-term coffee consumption in relation to fracture risk and bone mineral density in women
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Ortopedi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Ortopedi.ORCID-id: 0000-0002-4421-6466
Livsmedelsverket.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Ortopedi.
Vise andre og tillknytning
2013 (engelsk)Inngår i: American Journal of Epidemiology, ISSN 0002-9262, E-ISSN 1476-6256, Vol. 178, nr 6, s. 898-909Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

High consumption of coffee has been suggested to reduce the risk of some late-onset diseases and death but also to contribute to the development of osteoporotic fractures. Results of previous fracture studies have been inconsistent, and a comprehensive study is needed. The longitudinal population-based Swedish Mammography Cohort, including 61,433 women born in 1914-1948, was followed up from 1987 through 2008. Coffeeconsumption was assessed with repeated food frequency questionnaires. During follow-up, 14,738 women experienced fracture of any type, and 3,871 had a hip fracture. In a subcohort (n = 5,022), bone density was measured and osteoporosis determined (n = 1,012). After multivariable adjustment, there was no evidence of a higher rate of any fracture (hazard ratio per 200 mL coffee = 0.99; 95% confidence interval: 0.98, 1.00) or hip fracture (hazard ratio per 200 mL coffee = 0.97, 95% confidence interval: 0.95, 1.00) with increasing coffeeconsumption. A high coffee intake (>= 4 cups daily) versus a low intake (<1 cup daily) was associated with a 2%-4% lower bone density, depending on site (P < 0.001), but the odds ratio for osteoporosis was only 1.28 (95% confidence interval: 0.88, 1.87). Thus, high coffeeconsumption was associated with a small reduction in bone density that did not translate into an increased risk of fracture.

sted, utgiver, år, opplag, sider
2013. Vol. 178, nr 6, s. 898-909
Emneord [en]
Bone mineral density, coffee, cohort study, fracture, osteoporosis
HSV kategori
Forskningsprogram
Epidemiologi
Identifikatorer
URN: urn:nbn:se:uu:diva-196322DOI: 10.1093/aje/kwt062ISI: 000325150600012OAI: oai:DiVA.org:uu-196322DiVA, id: diva2:609864
Forskningsfinansiär
Swedish Research CouncilSIMPLERTilgjengelig fra: 2013-03-07 Laget: 2013-03-07 Sist oppdatert: 2020-09-11bibliografisk kontrollert
Inngår i avhandling
1. Coffee Consumption in Relation to Osteoporosis and Fractures: Observational Studies in Men and Women
Åpne denne publikasjonen i ny fane eller vindu >>Coffee Consumption in Relation to Osteoporosis and Fractures: Observational Studies in Men and Women
2013 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

During the past decades, the incidence of osteoporotic fractures has increased dramatically in the Western world. Consumption of coffee and intake of caffeine have in some studies been found to be associated with increased risk of osteoporotic fractures, but overall results from previous research are inconsistent. Despite weak evidence, some osteoporosis organisations recommend limiting daily coffee or caffeine intake.

The primary aim of this thesis was to study the association between long-term consumption of coffee and bone mineral density (BMD), incidence of osteoporosis and fractures. A secondary aim was to study the relation between tea consumption and fracture risk.

An increased risk of osteoporotic fractures in individuals who consumed ≥ 4 cups of coffee vs < 1 cup coffee per day was demonstrated in a study of 31,257 Swedish middle-aged and elderly women (a part of the Swedish Mammography Cohort - SMC) when calcium intake was low (< 700 mg/day). However, no higher risks of osteoporosis or fractures were observed in the full SMC with increasing coffee consumption. In the full SMC (n = 61,433) the follow-up was longer and the number of fractures was higher. Similarly, no statistically significant associations between consumption of coffee (≥ 4 cups of coffee vs < 1 cup) and incidence of osteoporotic fractures were observed in the Cohort of Swedish Men (COSM), including 45,339 men. Calcium intake did not modify the results from the investigations performed in the full SMC or COSM.

Nonetheless, a 2 - 4% lower BMD at measured sites was observed in men participating in the PIVUS cohort and in women from a sub-cohort of the SMC who consumed ≥ 4 cups of coffee vs < 1 cup daily. Individuals with high coffee intake and rapid metabolism of caffeine had lower BMD at the femoral neck.

No association between tea consumption and risk of fractures was found in the studies.

In conclusion, the findings presented in this thesis demonstrate that high consumption of coffee may be associated with a modest decrease in BMD. However, there was no evidence of a substantially increased incidence of osteoporosis or fractures typically associated with osteoporosis.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2013. s. 100
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 1651-6206 ; 874
Emneord
Coffee, Tea, Caffeine, Bone mineral density, Osteoporosis, Fractures, Cohort studies
HSV kategori
Identifikatorer
urn:nbn:se:uu:diva-196332 (URN)978-91-554-8615-0 (ISBN)
Disputas
2013-04-26, Sal IX, Universitetshuset, Biskopsgatan 3, Uppsala, 09:00 (svensk)
Opponent
Veileder
Forskningsfinansiär
Swedish Research Council
Tilgjengelig fra: 2013-04-05 Laget: 2013-03-07 Sist oppdatert: 2013-08-30bibliografisk kontrollert

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