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Cigarette smoking within the past 30 days preceding the survey is the outcome variables while independent variables are age, education, gender, parental smoking habits, people smoking at home, people smoking in the presence of adolescents, boys and girls felt adolescents who smoke have more friends, accepting a cigarette offered by one of the best friends, perception about harmful, attractiveness, and gain/loss weight

The company stresses quitting smoking is the best way to reduce risk and that iQOS is meant for adult smokers who want to continue using tobacco, not kids or non-smokers

10.1093/ntr/ntr040 The ICD-10 Classification of Mental and Behavioural Disorders: Clinical Descriptions and Diagnostic Guidelines

Some cigarettes are dense and contain more tar while others use porous paper that can dilute the nicotine and tar