Korean J Fam Med.
2013 Jul;34(4):265-271. 10.4082/kjfm.2013.34.4.265.
Association between Coffee Consumption and Renal Impairment in Korean Women with and without Diabetes: Analysis of the Fourth Korea National Health and Nutrition Examination Survey in 2008
- Affiliations
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- 1Department of Family Medicine, Kangbuk Samsung Hospital, SungKyunKwan University, School of Medicine, Seoul, Korea.
- 2Department of Family Medicine, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea.
- 3Department of Family Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea.
- 4Health Screening Center, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Suwon, Korea.
- 5Department of Family Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. jklee@skku.edu
- KMID: 2304187
- DOI: http://doi.org/10.4082/kjfm.2013.34.4.265
Abstract
- BACKGROUND
Recent studies suggest that coffee consumption has an influence on kidney function. This study investigated the relationship between habitual coffee consumption and renal impairment in Korean women, in consideration of diabetic status.
METHODS
This study involved 2,673 women aged 35 to 84 years who had participated in the Fourth Korea National Health and Nutrition Examination Surveys, conducted in 2008. Habitual coffee consumption was classified into three categories: less than 1 cup per day, 1 cup per day, and 2 or more cups per day. Renal function impairment was defined as an estimated glomerular filtration rate less than 60 mL/min/1.73 m2 by the Modification of Diet in Renal Disease equation.
RESULTS
The prevalence of diabetes and renal function impairment was higher in women who drank < 1 cup of coffee per day. Compared with drinking < 1 cup of coffee per day, the odds ratio (OR) for renal function impairment was significantly lower (OR, 0.59; 95% confidence interval [CI], 0.37 to 0.95; P = 0.03) in those who habitually drank > or = 2 cups per day after adjusting for multiple confounding factors. When data were stratified according to the presence of diabetes, coffee consumption > or = 2 cups of coffee per day showed an inverse association with renal function impairment in only diabetic women (OR, 0.14; 95% CI, 0.02 to 0.88; P = 0.04), compared with consumption < 1 cup of coffee per day.
CONCLUSION
In a representative sample of Korean women, coffee consumption was significantly associated with a decreased risk of renal impairment especially in middle and elderly-aged diabetic women.
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