Yue Wang1, Hong Duan2, Helen Yang3. 1. Department of Surgery, Liaoning Cancer Hospital and Institute, Shenyang, 110042, China. Electronic address: 13514212975@163.com. 2. Department of Epidemiology, Zhengzhou University, Zhengzhou, China. 3. Institute of Public Health, University of California, San Francisco, USA.
Abstract
OBJECTIVE: The purpose of our study was to investigate the association between green tea (Camellia sinensis) drinking habits and risk of stomach cancer in China. METHOD: A 1:2 matched hospital-based case-control study including 160 cases and 320 controls was conducted. A self-designed questionnaire was used to collect information on possible risk factors of stomach cancer, and to assess the green tea drinking habit. Conditional logistic regression was used to calculate odds ratios (ORs) and corresponding 95% confidence intervals (CIs). RESULT: Our study proposed that green tea was associated with risk of stomach cancer. Regular drinking (OR = 0.72), larger amount of consumption (≥35 g/week) (OR = 0.53) were protective factors. Among regular tea drinkers, lower temperature and longer interval between tea being poured and drunk also reduced the risk. Moreover, a strong agreement was found between temperature at which tea was drunk and tea interval (Correlation coefficient p value = 0.73). CONCLUSION: Habits of green tea drinking, including regular drinking, larger amount of consumption, lower temperature and longer interval were strongly associated with a lower risk of stomach cancer.
OBJECTIVE: The purpose of our study was to investigate the association between green tea (Camellia sinensis) drinking habits and risk of stomach cancer in China. METHOD: A 1:2 matched hospital-based case-control study including 160 cases and 320 controls was conducted. A self-designed questionnaire was used to collect information on possible risk factors of stomach cancer, and to assess the green tea drinking habit. Conditional logistic regression was used to calculate odds ratios (ORs) and corresponding 95% confidence intervals (CIs). RESULT: Our study proposed that green tea was associated with risk of stomach cancer. Regular drinking (OR = 0.72), larger amount of consumption (≥35 g/week) (OR = 0.53) were protective factors. Among regular tea drinkers, lower temperature and longer interval between tea being poured and drunk also reduced the risk. Moreover, a strong agreement was found between temperature at which tea was drunk and tea interval (Correlation coefficient p value = 0.73). CONCLUSION: Habits of green tea drinking, including regular drinking, larger amount of consumption, lower temperature and longer interval were strongly associated with a lower risk of stomach cancer.
Authors: Georgia Martimianaki; Gianfranco Alicandro; Claudio Pelucchi; Rossella Bonzi; Matteo Rota; Jinfu Hu; Kenneth C Johnson; Charles S Rabkin; Linda M Liao; Rashmi Sinha; Zuo-Feng Zhang; Michela Dalmartello; Nuno Lunet; Samantha Morais; Domenico Palli; Monica Ferraroni; Guo-Pei Yu; Shoichiro Tsugane; Akihisa Hidaka; Maria Paula Curado; Emmanuel Dias-Neto; David Zaridze; Dmitry Maximovitch; Jesus Vioque; Manoli Garcia de la Hera; Lizbeth López-Carrillo; Raúl Ulises Hernández-Ramírez; Gerson Shigueaki Hamada; Mary H Ward; Lina Mu; Reza Malekzadeh; Farhad Pourfarzi; Antonia Trichopoulou; Anna Karakatsani; Robert C Kurtz; Areti Lagiou; Pagona Lagiou; Stefania Boccia; Paolo Boffetta; M Constanza Camargo; Eva Negri; Carlo La Vecchia Journal: Br J Cancer Date: 2022-05-24 Impact factor: 9.075