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. 2021 Sep 7;21(1):486.
doi: 10.1186/s12877-021-02431-3.

Sex differences in the association between green tea consumption and hypertension in elderly Chinese adults

Xiaodong Peng  1   2 , Mengxia Zhang  1   2 , Xuesi Wang  1   2 , Kui Wu  1   2 , Yukun Li  1   2 , Linling Li  3 , Jiaxue Yang  1   2 , Yanfei Ruan  1   2 , Rong Bai  1   2 , Changsheng Ma  1   2 , Nian Liu  4   5
Affiliations

Sex differences in the association between green tea consumption and hypertension in elderly Chinese adults

Xiaodong Peng et al. BMC Geriatr. .

Abstract

Background: Green tea has been one of the most popular beverages in China since ancient times. Mixed results concerning the effect of green tea consumption on the incidence of hypertension have been published over the past decades. However, no previous studies have focused on longevous individuals in China and the sex differences in the association between habitual green tea intake and hypertension.

Methods: The data extracted from the database of the Chinese Longitudinal Healthy Longevity Survey (CLHLS) in 2018 were used for a secondary analysis. Logistic regression models were employed to examine the odds ratio (OR) of daily green tea consumption on the incidence of hypertension by sex.

Results: A total of 9277 individuals were included in the analysis (39.8% were men). The included individuals had a mean age of 80.9 and 84.8 years for those who drank green tea daily and those who had never, respectively (p < 0.001). The incidence of hypertension varied at baseline according to green tea drinking habit and sex. For women who had a habitual green tea intake or had never drunk green tea, the incidence of hypertension was 47.3 and 43.9%, respectively (p = 0.241), whereas it was 51.6 and 39.7% for men (p < 0.001). After adjusting for potential confounders, a 38% increase in the risk of hypertension was observed in men who consumed green tea daily (OR, 1.38; 95% CI, 1.15-1.67; p < 0.001).

Conclusions: Chinese longevous men had a 38% higher risk of developing hypertension when drinking green tea daily. However, no effect of green tea consumption on the incidence of hypertension in women was found. More attention should be paid to the lifestyle of longevous individuals for health promotion, and a sex-specific approach to deliver care for very elderly people is warranted.

Keywords: Blood pressure; China; Elderly; Green tea; Hypertension; Sex difference; Tea.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Incidence of hypertension according to green tea drinking habit and sex. The pie charts show the prevalence of hypertension: the white part represents individuals with hypertension while the grey part represents individuals without
Fig. 2
Fig. 2
Relation between habitual green tea drinking and risk of hypertension stratified by different factors
See this image and copyright information in PMC

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