Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China.
Department of Orthopedics, the First Affiliated Hospital of Shantou University Medical College, Shantou, 515041, Guangdong, China.
Arch Osteoporos. 2020 Mar 18;15(1):49. doi: 10.1007/s11657-020-00723-6.
Observational studies have shown that tea consumption has a potentially beneficial effect on bone health. However, few studies have assessed the effects of types of tea consumed on bone health. We aimed to investigate whether drinking oolong tea is associated with increased calcaneus bone mineral density (BMD) in postmenopausal women.
From an epidemiological survey in Shantou, 476 postmenopausal women aged 40 to 88 years were enrolled in the study. All women were questioned about their demographic features, lifestyle, health status, types of tea consumed, habit of tea consumption, and habitual dietary intake by use of a structured questionnaire. Estimated areal BMD was measured by calcaneal quantitative ultrasound (QUS).
As compared with non-tea drinkers, oolong tea drinkers had higher calcaneus BMD (β 34.70 [95% CI 10.38, 59.03]). In addition, calcaneus BMD was significantly increased for those drinking 1-5 cups/day (β 27.43 [95% CI 3.70, 51.16]) but not > 5 cups/day. We observed no linear increase in calcaneus BMD with increasing years of tea consumption and local polynomial regression fitting showed a parabola-shaped association between years of tea consumption and calcaneus BMD. However, symptoms of osteoporosis did not differ by types of tea consumed.
Long-term moderate oolong tea consumption may have beneficial effects on bone health in postmenopausal women in Shantou of southern China.
观察性研究表明，饮茶可能对骨骼健康有益。然而，很少有研究评估所饮茶叶种类对骨骼健康的影响。我们旨在调查饮用乌龙茶是否与绝经后妇女的跟骨骨密度（BMD）增加有关。
从汕头的一项流行病学调查中，招募了 476 名年龄在 40 岁至 88 岁的绝经后妇女参与研究。所有女性均通过结构化问卷被询问了人口统计学特征、生活方式、健康状况、饮茶种类、饮茶习惯和习惯性饮食摄入。通过跟骨定量超声（QUS）测量估计的面积 BMD。
与不饮茶者相比，乌龙茶饮用者的跟骨 BMD 更高（β 34.70 [95% CI 10.38, 59.03]）。此外，每天饮用 1-5 杯（β 27.43 [95% CI 3.70, 51.16]）而非 >5 杯的人，跟骨 BMD 明显增加。我们没有观察到跟骨 BMD 随饮茶年限的增加而线性增加，局部多项式回归拟合显示饮茶年限与跟骨 BMD 之间呈抛物线关系。然而，骨质疏松症的症状不因所饮茶叶种类而异。
长期适量饮用乌龙茶可能对中国南方汕头地区绝经后妇女的骨骼健康有益。
