Fig 1.
Directed acyclic graph.
Fig 2.
Cohort derivation.
Fig 3.
Covariate balance before and after overlap weighting.
Fig 4.
Possible selection bias.
Table 1.
The relative characteristics and outcomes of critically ill COVID-19 patients partitioned by nicotine dependence status.
Table 2.
Overlap weighted means of COVID-19 hospitalizations for current and never nicotine dependent individuals.
Table 3.
The association of nicotine dependence and mortality among critically-ill COVID-19 patients.
Table 4.
Sensitivity analyses for the association of current versus never nicotine dependent and mortality among critically-ill COVID-19 patients.
Table 5.
Sensitivity analyses by year for the association of nicotine dependence and mortality among critically-ill COVID-19 patients.
Table 6.
Subgroup analyses for the association of nicotine dependence and in-hospital mortality among critically-ill COVID-19 patients.
Table 7.
Subgroup analyses for the association of nicotine dependence and short-term mortality among critically-ill COVID-19 patients.
Fig 5.
Forest plot for in-hospital mortality.