Osteoporosis International

, Volume 17, Issue 7, pp 1055–1064

Coffee, tea and caffeine consumption in relation to osteoporotic fracture risk in a cohort of Swedish women

Original Article



Consumption of coffee and tea, and total intake of caffeine has been claimed to be associated with osteoporotic fracture risk. However, results of earlier studies lack consistency.


We examined this relation in a cohort of 31,527 Swedish women aged 40-76 years at baseline in 1988. The consumption of coffee, caffeinated tea and the intake of caffeine were estimated from a self-administered food frequency questionnaire (FFQ). Multivariate-adjusted hazards ratios (HRs) of fractures with 95% confidence intervals (95% CIs) were estimated by Cox proportional hazards models.


During a mean follow-up of 10.3 years, we observed 3,279 cases with osteoporotic fractures. The highest (>330 mg/day) compared with the lowest (<200 mg/day) quintile of caffeine intake was associated with a modestly increased risk of fracture: HR 1.20 (95% CI: 1.07–1.35). A high coffee consumption significantly increased the risk of fracture (p for trend 0.002), whereas tea drinking was not associated with risk. The increased risk of fracture with both a high caffeine intake and coffee consumption was confined to women with a low calcium intake (<700 mg/day): HR 1.33 (95% CI: 1.07–1.65) with ≥4 cups (600 ml)/day of coffee compared to <1 cup (150 ml)/day. The same comparison but risk estimated for women with a high propensity for fractures (≥2 fracture types) revealed a HR of 1.88 (95% CI: 1.17–3.00).


In conclusion, our results indicate that a daily intake of 330 mg of caffeine, equivalent to 4 cups (600 ml) of coffee, or more may be associated with a modestly increased risk of osteoporotic fractures, especially in women with a low intake of calcium.


Caffeine Coffee Cohort study Fracture Tea 

Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2006

Authors and Affiliations

  • H. Hallström
    • 1
  • A. Wolk
    • 2
  • A. Glynn
    • 1
  • K. Michaëlsson
    • 3
  1. 1.Department of ToxicologyNational Food AdministrationUppsalaSweden
  2. 2.National Institute of Environmental Medicine, Division of Nutritional EpidemiologyKarolinska InstituteStockholmSweden
  3. 3.Department of Surgical SciencesSection of Orthopedics, University HospitalUppsalaSweden

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