TY - JOUR
T1 - High oolong tea consumption predicts future risk of diabetes among Japanese male workers
T2 - A prospective cohort study
AU - Hayashino, Y.
AU - Fukuhara, S.
AU - Okamura, T.
AU - Tanaka, T.
AU - Ueshima, H.
PY - 2011/7
Y1 - 2011/7
N2 - Aims Acute administration of oolong tea decreases blood glucose levels. We investigated the association between long-term oolong tea intake and subsequent risk of developing diabetes among men of working age. Methods Data were analysed from a cohort of participants in the High-risk and Population Strategy for Occupational Health Promotion Study (HIPOP-OHP), conducted in Japan from 1999 to 2004. Oolong tea intake at baseline and subsequent risk of diabetes was evaluated using a Cox proportional hazards model. Results Of 4975 male workers, a total of 201 cases of diabetes were reported over a median of 3.4years of follow-up. Mean age and BMI of all participants at baseline were 38.3years and 22.9kg/m 2, respectively. Compared with those not consuming oolong tea, multivariable adjusted hazard ratios for developing diabetes were 1.00 (95%CI 0.67-1.49) for those who drank one cup of oolong tea per day and 1.64 (95%CI 1.11-2.40) for those drinking two or more cups per day. Fasting blood glucose increment per year was 0.11mmol/l (95%CI 0.09-0.12mmol/l), 0.12mmol/l (95%CI 0.09-0.15mmol/l) and 0.15mmol/l (95%CI 0.11-0.18mmol/l), respectively, for oolong tea consumption of 0, 1 and ≥2cups/day, with a significant linear trend (P<0.0001). Conclusions Long-term consumption of oolong tea may be a predictive factor for new onset diabetes. Further studies are necessary to elucidate the role of oolong tea in the risk of developing diabetes.
AB - Aims Acute administration of oolong tea decreases blood glucose levels. We investigated the association between long-term oolong tea intake and subsequent risk of developing diabetes among men of working age. Methods Data were analysed from a cohort of participants in the High-risk and Population Strategy for Occupational Health Promotion Study (HIPOP-OHP), conducted in Japan from 1999 to 2004. Oolong tea intake at baseline and subsequent risk of diabetes was evaluated using a Cox proportional hazards model. Results Of 4975 male workers, a total of 201 cases of diabetes were reported over a median of 3.4years of follow-up. Mean age and BMI of all participants at baseline were 38.3years and 22.9kg/m 2, respectively. Compared with those not consuming oolong tea, multivariable adjusted hazard ratios for developing diabetes were 1.00 (95%CI 0.67-1.49) for those who drank one cup of oolong tea per day and 1.64 (95%CI 1.11-2.40) for those drinking two or more cups per day. Fasting blood glucose increment per year was 0.11mmol/l (95%CI 0.09-0.12mmol/l), 0.12mmol/l (95%CI 0.09-0.15mmol/l) and 0.15mmol/l (95%CI 0.11-0.18mmol/l), respectively, for oolong tea consumption of 0, 1 and ≥2cups/day, with a significant linear trend (P<0.0001). Conclusions Long-term consumption of oolong tea may be a predictive factor for new onset diabetes. Further studies are necessary to elucidate the role of oolong tea in the risk of developing diabetes.
KW - Beverage intake
KW - Diabetes
KW - Incidence
KW - Oolong tea
KW - Risk factor
UR - http://www.scopus.com/inward/record.url?scp=79955032367&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955032367&partnerID=8YFLogxK
U2 - 10.1111/j.1464-5491.2011.03239.x
DO - 10.1111/j.1464-5491.2011.03239.x
M3 - Article
C2 - 21244473
AN - SCOPUS:79955032367
SN - 0742-3071
VL - 28
SP - 805
EP - 810
JO - Diabetic medicine : a journal of the British Diabetic Association
JF - Diabetic medicine : a journal of the British Diabetic Association
IS - 7
ER -
