pack-years associated_with nicotine dependence
Evidence from:
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Evidence (1 sources)
Genetic and environmental contributions to the relationships between brain structure and average lifetime cigarette use.
(2015)
PMID:25690561
cited
Pack-years was strongly associated with a prior measure of the number of lifetime nicotine dependence symptoms (r = 0.70, p < 0.0001).
confidence: 0.96