Effects of tea consumption on renal function in a metropolitan Chinese population: the Guangzhou biobank cohort study

Tim J van Hasselt, Oliver Pickles, Alex Midgley-Hunt, Chao Quiang Jiang, Wei Sen Zhang, Kar Keung Cheng, Graham Neil Thomas, Tai Hing Lam

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    1 Citation (Scopus)

    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 languageEnglish
    Pages (from-to)26-31
    Number of pages6
    JournalJournal of Renal Nutrition
    Volume24
    Issue number1
    DOIs
    Publication statusPublished - 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

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