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Doctors, although trained in the diagnosis and treatment of smoking-related illnesses, may be less comfortable in providing the counseling and drug treatment smokers need to quit

To explore moderation of trends among cigarette smokers by age, gender, occupational social grade, vaping status, and level of alcohol consumption, we repeated the model including the interaction between the moderator of interest and timethus allowing for time trends to differ across subgroups

doi: 10.1016/j.yexmp.2012.04.008 21 HelmboldPLahtzCHerpelESchnabelPADammannRH

Smoking increases the levels of carbon monoxide in the body and this decreases the levels of testosterone