Tong Xiaoliang, Taylor Anne W, Giles Lynne, Wittert Gary A, Shi Zumin
Discipline of Medicine, The University of Adelaide, 122 Frome Street, Adelaide, SA 5000, Australia.
Nutr J. 2014 Oct 14;13:98. doi: 10.1186/1475-2891-13-98.
Data relating to the association between tea consumption and blood pressure change are inconsistent. The aim of this analysis was to investigate the association between tea consumption and the change in blood pressure (BP) in Chinese adults over a 5-year period.
Data from 1109 Chinese men (N= 472) and women (N= 637) who participated in the Jiangsu Nutrition Study (JIN) were analysed. BP was measured in 2002 and 2007. Tea (green, black and total tea) consumption was quantitatively assessed at the follow-up survey in 2007.
Total tea and green tea consumption were inversely associated with 5-year diastolic BP (DBP) but not systolic BP (SBP) change. In the multivariable analysis, compared with no consumption of tea, those with daily total tea/green tea consumption of at least10 g had 2.41 mmHg and 3.68 mmHg smaller increase of DBP respectively. There was a significant interaction between smoking and total tea/green tea consumption and DBP change. The inverse association between total tea/green tea consumption and DBP change was significant only in non-smokers. Green tea consumption was inversely associated with SBP change only in non-smokers and those without central obesity.
The consumption of green tea is inversely associated with 5-year BP change among Chinese adults, an effect abrogated by smoking.
关于饮茶与血压变化之间关联的数据并不一致。本分析的目的是调查中国成年人在5年期间饮茶与血压（BP）变化之间的关联。
对参与江苏营养研究（JIN）的1109名中国男性（N = 472）和女性（N = 637）的数据进行了分析。在2002年和2007年测量了血压。在2007年的随访调查中对茶（绿茶、红茶和总茶量）的摄入量进行了定量评估。
总茶量和绿茶摄入量与5年舒张压（DBP）变化呈负相关，但与收缩压（SBP）变化无关。在多变量分析中，与不饮茶者相比，每日总茶量/绿茶摄入量至少为10克的人群舒张压升高分别少2.41毫米汞柱和3.68毫米汞柱。吸烟与总茶量/绿茶摄入量和舒张压变化之间存在显著交互作用。总茶量/绿茶摄入量与舒张压变化之间的负相关仅在不吸烟者中显著。绿茶摄入量仅在不吸烟者和无中心性肥胖者中与收缩压变化呈负相关。
绿茶摄入量与中国成年人5年血压变化呈负相关，吸烟会消除这种影响。
