Abstract(s)
Purpose
Coffee and black tea are among the most consumed beverages worldwide. While their potential
role in lung cancer occurrence has been investigated in several studies, results have been
inconclusive. We investigated the associations between intake of coffee and black tea with lung
cancer in a population-based case-control study in Montreal, Canada.
Methods
These analyses included 1,130 cases and 1,483 controls. Adjusted odds ratios (OR) were
estimated between four metrics of coffee and black tea consumption (frequency, average
daily amount, duration, and cumulative amount) and lung cancer, using unconditional logistic
regression.
Results
The adjusted ORs (95% confidence intervals) for lung cancer comparing daily to never
consumers were 0.73 (0.49-1.10) for coffee and 1.05 (0.85-1.31) for black tea. Analyses of other
metrics did not reveal any clear patterns of increasing or decreasing risk with increasing amounts
or duration of consumption. There was no strong evidence of OR modification by sex or smoking
level. The OR estimates did not materially differ by histological subtype for either of the
beverages.
Conclusion
Our results do not provide strong support for associations between consumption of coffee and
black tea and lung cancer.