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We studied the associations of leukocyte telomere length (LTL) with all-cause, cardiovascular disease, and cancer mortality in 12,199 adults participating in 2 population-based prospective cohort studies from Europe (ESTHER) and the United States (Nurses' Health Study). Blood samples were collected in 1989-1990 (Nurses' Health Study) and 2000-2002 (ESTHER). LTL was measured by quantitative polymerase chain reaction. We calculated z scores for LTL to standardize LTL measurements across the cohorts. Cox proportional hazards regression models were used to calculate relative mortality according to continuous levels and quintiles of LTLz scores. The hazard ratios obtained from each cohort were subsequently pooled by meta-analysis. Overall, 2,882 deaths were recorded during follow-up (Nurses' Health Study, 1989-2010; ESTHER, 2000-2015). LTL was inversely associated with age in both cohorts. After adjustment for age, a significant inverse trend of LTL with all-cause mortality was observed in both cohorts. In random-effects meta-analysis, age-adjusted hazard ratios for the shortest LTL quintile compared with the longest were 1.23 (95% confidence interval (CI): 1.04,1.46) for all-cause mortality, 1.29 (95% CI: 0.83, 2.00) for cardiovascular mortality, and 1.10 (95% CI: 0.88, 1.37) for cancer mortality. In this study population with an age range of 43-75 years, we corroborated previous evidence suggesting that LTL predicts all-cause mortality beyond its association with age. [ABSTRACT FROM AUTHOR]

Background: A small change in tea consumption at population level could have large impact on public health. However, the health benefits of tea intake among Americans are inconclusive. Objective: To evaluate the association between tea consumption and all-causes, cardiovascular disease (CVD) and cancer mortality in the Aerobics Center Longitudinal study (ACLS). Methods: 11808 participants (20-82 years) initially free of CVD and cancers enrolled in the ACLS and were followed for mortality. Participants provided baseline self-report of tea consumption (cups/day). During a median follow-up of 16 years, 842 participants died. Of others, 250 died from CVD, and 345 died from cancer, respectively. A Cox proportional hazard model was used to produce hazard ratio (HR) and 95% confidence interval (CI). Results: Compared with participants consuming no tea, tea drinkers had a survival advantage ( Log-2 = 10.2, df = 3, P = 0.017); however, the multivariate hazard ratios (HRs) of all-cause mortality for those drinking 1–7, 8–14, and >14 cups/week were 0.95 (95% CI, 0.81–1.12), 1.00 (95% CI, 0.82–1.22), and 0.98 (95% CI, 0.76–1.25), respectively (P for linear trend = 0.83). The multivariate HR were 1.16 (95% CI, 0.86–1.56), 1.22 (95% CI, 0.85–1.76), and 0.94 (95% CI, 0.56–1.54) for CVD mortality (P for linear trend = 0.47), and 0.97 (95% CI, 0.75–1.25), 0.85 (95% CI, 0.60–1.16), and 0.94 (95% CI, 0.64–1.38) for cancer mortality (P for trend = 0.62). Conclusions: There were week or null relationships between tea consumption and mortality due to all-cause, CVD disease or cancer were observed in ACLS. [ABSTRACT FROM PUBLISHER]