Journal
BRITISH JOURNAL OF NUTRITION
Volume 111, Issue 8, Pages 1421-1429Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114513003644
Keywords
Risk; Epidemiology; Tea; Dyslipidaemia; China
Categories
Funding
- Science and Technology Plans of Guangdong Province [2011B031800209]
- Medical Scientific Research Foundation of Guangdong Province [A2010388]
- Joint Research Project of Clinical and Basic Courses, Shantou University Medical College
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Experimental studies have suggested that tea consumption could lower the risk of dyslipidaemia. However, epidemiological evidence is limited, especially in southern China, where oolong tea is the most widely consumed beverage. We conducted a population-based case-control study to evaluate the association between consumption of tea, especially oolong tea, and risk of dyslipidaemia in Shantou, southern China, from 2010 to 2011. Information on tea consumption, lifestyle characteristics and food consumption frequency of 1651 patients with newly diagnosed dyslipidaemia and 1390 controls was obtained using a semi-quantitative questionnaire. Anthropometric variables and serum biochemical indices were determined. Drinking more than 600ml (2 paos) of green, oolong or black tea daily was found to be associated with the lowest odds of dyslipidaemia risk (P<0 center dot 001) when compared with non-consumption, but only oolong tea consumption was found to be associated with low HDL-cholesterol levels. A dose-response relationship between duration of tea consumption and risk of dyslipidaemia (OR 0 center dot 10, 95% CI 0 center dot 06, 0 center dot 16), as well as that between amount of dried tea leaves brewed and risk of dyslipidaemia (OR 0 center dot 34, 95% CI 0 center dot 24, 0 center dot 48), was found. Moreover, consumption of oolong tea for the longest duration was found to be associated with 3 center dot 22, 11 center dot 99 and 6 center dot 69% lower blood total cholesterol, TAG and LDL-cholesterol levels, respectively. In conclusion, the present study indicates that long-term oolong tea consumption may be associated with a lower risk of dyslipidaemia in the population of Shantou in southern China.
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