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Heavier smoking increases coffee consumption: findings from a Mendelian randomization analysis
Author(s) -
Johan Hå‌kon Bjø‌rngaard,
Ask Tybjærg Nordestgaard,
Amy E. Taylor,
Jorien L. Treur,
Maiken E. Gabrielsen,
Marcus R. Munafò,
Børge G. Nordestgaard,
Bjørn Olav Åsvold,
Pål Romundstad,
George Davey Smith
Publication year - 2017
Publication title -
international journal of epidemiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.406
H-Index - 208
eISSN - 1464-3685
pISSN - 0300-5771
DOI - 10.1093/ije/dyx147
Subject(s) - mendelian randomization , medicine , caffeine , consumption (sociology) , population , demography , environmental health , genotype , biology , genetic variants , genetics , social science , sociology , gene
There is evidence for a positive relationship between cigarette and coffee consumption in smokers. Cigarette smoke increases metabolism of caffeine, so this may represent a causal effect of smoking on caffeine intake.

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