Never, non-daily, and daily smoking status and progression to daily cigarette smoking as correlates of major depressive episode in a national sample of youth: Results from the National Survey of Drug Use and Health 2013 to 2015

•Examined correlates of never, nondaily, and daily smoking in youth•Examined associations of never, nondaily, and daily smoking with depression•Examined associations of progression to daily smoking with depression•Daily and non-daily smokers were most likely to report depression.•Faster progression was associated with increased odds of depression.