Changes in coffee intake and subsequent risk of type 2 diabetes: three large cohorts of US men and women
Coffee and tea consumption has been associated with a lower type 2 diabetes risk but little is known about how changes in coffee and tea consumption influence subsequent type 2 diabetes risk. We examined the associations between 4 year changes in coffee and tea consumption and risk of type 2 diabetes in the subsequent 4 years.
We prospectively followed 48,464 women in the Nurses’ Health Study (NHS; 1986–2006), 47,510 women in NHS II (1991–2007) and 27,759 men in the Health Professionals Follow-up Study (HPFS; 1986–2006). Diet was assessed every 4 years using a validated food-frequency questionnaire. Self-reported cases of incident type 2 diabetes were validated by supplementary questionnaires.
During 1,663,319 person-years of follow-up, we documented 7,269 cases of incident type 2 diabetes. Participants who increased their coffee consumption by more than 1 cup/day (median change = 1.69 cups/day) over a 4 year period had an 11% (95% CI 3%, 18%) lower risk of type 2 diabetes in the subsequent 4 years compared with those who made no changes in consumption. Participants who decreased their coffee intake by more than 1 cup/day (median change = −2 cups/day) had a 17% (95% CI 8%, 26%) higher risk for type 2 diabetes. Changes in tea consumption were not associated with type 2 diabetes risk.
Our data provide novel evidence that increasing coffee consumption over a 4 year period is associated with a lower risk of type 2 diabetes, while decreasing coffee consumption is associated with a higher risk of type 2 diabetes in subsequent years.
- Changes in coffee intake and subsequent risk of type 2 diabetes: three large cohorts of US men and women
Volume 57, Issue 7 , pp 1346-1354
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- Springer Berlin Heidelberg
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- Caffeinated coffee
- Decaffeinated coffee
- Type 2 diabetes
- Industry Sectors
- Author Affiliations
- 1. Department of Nutrition, Harvard School of Public Health, 655 Huntington Ave, Boston, MA, 02115, USA
- 2. Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore, Republic of Singapore
- 3. Division of Preventive Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
- 4. Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
- 5. Channing Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA