Table 3—

Cannabis use and tobacco use, as continuous variables, and risk of lung cancer

CharacteristicRR of lung cancer95% CI
Pack-yr of cigarette smoking#1.071.05–1.09
Joint-yr of cannabis smoking1.081.02–1.15
Joint-yrs to 5 yrs prior to diagnosis+1.101.02–1.18
  • RR: relative risk; CI: confidence interval. #: adjusted for age, sex, ethnicity, family history of lung cancer and joint-yrs of cannabis use. : adjusted for age, sex, ethnicity, family history of lung cancer and pack-yrs. +: adjusted for age, sex, ethnicity, family history of lung cancer, pack-yrs and age of onset of cannabis use.