Abstract
OBJECTIVE: Green tea consumption has been associated with many prophylactic health benefits. This study examined for the first time associations between tea consumption and renal function in a Chinese population.
DESIGN AND METHODS: Cross-sectional baseline data including demographics, and lifestyle and weekly consumption of green, black, and oolong tea were analyzed from 12,428 ambulatory subjects aged 50 to 85 years (67.3% female) that were randomly selected from the membership list of a community social and welfare association in Guangzhou, China.
INTERVENTION: Associations between tea consumption and renal function were assessed using regression analyses to adjust for potential confounding factors.
MAIN OUTCOME MEASURE: Renal function was assessed using the estimated glomerular filtration rate (eGFR) and in a subcohort of 1,910 participants using a spot urinary albumin-to-creatinine ratio.
RESULTS: Six thousand eight hundred and seventy-two participants drank at least 1 type of tea. Oolong tea consumption was negatively associated with eGFR (β-coefficient -0.019, P = .025), but in a gender-stratified analysis this was not the case. In men, black tea was positively associated with eGFR (β-coefficient 0.037, P = .013), but not in women (β-coefficient -0.002, P = .856). Otherwise, no statistically significant consistent associations between the measures of renal function and consumption of green tea, black tea, or oolong tea individually or total tea consumption were identified.
CONCLUSION: Overall there was no clear evidence to suggest any consistent association between renal function and tea consumption in this large population-based study of older Chinese individuals.
Original language | English |
---|---|
Pages (from-to) | 26-31 |
Number of pages | 6 |
Journal | Journal of Renal Nutrition |
Volume | 24 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2014 |
Keywords
- Aged
- Aged, 80 and over
- Albuminuria
- Asian Continental Ancestry Group
- China
- Cohort Studies
- Creatinine
- Cross-Sectional Studies
- Female
- Glomerular Filtration Rate
- Humans
- Kidney
- Life Style
- Male
- Middle Aged
- Regression Analysis
- Risk Factors
- Tea