A major limitation across the literature is residual confounding from tobacco, given the high prevalence of dual use and the collinearity of exposure metrics (pack-years, depth of inhalation, and mixing practices such as blunts and tobacco-mixed joints)
As a young man, life kind of takes over, working and raising kids, etc., and there wasn't as munch time for art
We do not recommend leaving your battery unattended when it is recharging and do not charge overnight
Secondary analysis With adjustment for participants usual pack size reported at baseline, the estimated means for the number of cigarettes smoked per day for participants in the intervention group and the control group were 15.9 (SD = 7.7) and 16.7 (SD = 7.7) respectively with a mean difference of 0.8 cigarettes per day (95%CI = 4.3, 2.6, SE = 1.7)
A cooler iron wont transfer enough heat to ignite the tobacco