TY - JOUR
T1 - The Association between Tea Consumption and Bladder Cancer Risk Based on the Bladder Cancer Epidemiology and Nutritional Determinants (BLEND) International Consortium
AU - Zhang, Yan-Xi
AU - Albers, Richard
AU - Chen, Ya-Ting
AU - Steineck, Gunnar
AU - Kellen, Eliane
AU - Johnson, Kenneth C
AU - Lu, Chih-Ming
AU - Pohlabeln, Hermann
AU - Vecchia, Carlo La
AU - Porru, Stefano
AU - Carta, Angela
AU - Polesel, Jerry
AU - Bosetti, Cristina
AU - Jiang, Xuejuan
AU - Tang, Li
AU - Marshall, James
AU - Karagas, Margaret R
AU - Zhang, Zuo-Feng
AU - Taylor, Jack A
AU - Zeegers, Maurice P A
AU - Wesselius, Anke
AU - Yu, Evan Yi-Wen
PY - 2025
Y1 - 2025
N2 - Objectives: Evidence regarding the association between tea consumption and bladder cancer (BC) risk is inconsistent. This study aimed to increase our knowledge of the association by using international data from the Bladder Cancer Epidemiology and Nutritional Determinants Consortium. Methods: Individual data on 2,347 cases and 6,871 controls from 15 case-control studies with information on black, green, herbal, or general tea was pooled. The association was estimated using multilevel multivariable logistic regression analysis adjusted for multiple (non-)dietary factors. Results: Association between tea consumption and BC risk was observed (odds ratio, OR = 0.72, 95% confidence interval, 95% CI = 0.65–0.80) compared to non-tea drinkers. Stratified analyses based on gender and smoking status yielded similar results. Stratified analysis showed no significant association between black or green tea consumption and BC risk across models, while herbal tea consumption was linked to a reduced BC risk (OR = 0.59, 95% CI = 0.36–0.96). As daily tea consumption increased within a suitable range (<5.67 cups/day), BC risk decreased. Conclusions: Camellia sinensis tea showed no association with BC risk, while herbal tea was inversely linked to BC incidence. Despite some significant findings in the selected strata, further studies are required to clarify the underlying mechanisms.
AB - Objectives: Evidence regarding the association between tea consumption and bladder cancer (BC) risk is inconsistent. This study aimed to increase our knowledge of the association by using international data from the Bladder Cancer Epidemiology and Nutritional Determinants Consortium. Methods: Individual data on 2,347 cases and 6,871 controls from 15 case-control studies with information on black, green, herbal, or general tea was pooled. The association was estimated using multilevel multivariable logistic regression analysis adjusted for multiple (non-)dietary factors. Results: Association between tea consumption and BC risk was observed (odds ratio, OR = 0.72, 95% confidence interval, 95% CI = 0.65–0.80) compared to non-tea drinkers. Stratified analyses based on gender and smoking status yielded similar results. Stratified analysis showed no significant association between black or green tea consumption and BC risk across models, while herbal tea consumption was linked to a reduced BC risk (OR = 0.59, 95% CI = 0.36–0.96). As daily tea consumption increased within a suitable range (<5.67 cups/day), BC risk decreased. Conclusions: Camellia sinensis tea showed no association with BC risk, while herbal tea was inversely linked to BC incidence. Despite some significant findings in the selected strata, further studies are required to clarify the underlying mechanisms.
U2 - 10.1080/01635581.2025.2488063
DO - 10.1080/01635581.2025.2488063
M3 - Article
SN - 0163-5581
VL - 77
SP - 687
EP - 698
JO - Nutrition and Cancer-An International Journal
JF - Nutrition and Cancer-An International Journal
IS - 6
ER -