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Journal Club. Alcohol, Other Drugs, and Health: Current Evidence March–April 2018. Featured Article. Association of Noncigarette Tobacco Product Use With Future Cigarette Smoking Among Youth in the Population Assessment of Tobacco and Health (PATH) Study, 2013-2015
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Journal Club Alcohol, Other Drugs, and Health: Current Evidence March–April 2018 www.aodhealth.org
Featured Article Association of Noncigarette Tobacco Product Use With Future Cigarette Smoking Among Youth in the Population Assessment of Tobacco and Health (PATH) Study, 2013-2015 Watkins SL, et al. JAMA Pediatr. 2018;172(2):181–187. www.aodhealth.org
Study Objective • To determine whether use of smokeless tobacco products by non-smoking youth predicted cigarette initiation. www.aodhealth.org
Study Design • Prospective cohort study of 10,384 youths (aged 12-17) who reported never smoking a cigarette at baseline and who completed one-year follow-up questionnaire about cigarette use. • Outcome at one year was whether the participant ever smoked a cigarette, and at least one day of cigarette use in last 30 days. www.aodhealth.org
Assessing Validity of an Article about Prognosis • Are the results valid? • What are the results? • How can I apply the results to patient care? www.aodhealth.org
Are the Results Valid? • Was the sample representative? • Were the subjects sufficiently homogeneous with respect to prognostic risk? • Was follow-up sufficiently complete? • Were objective and unbiased outcome criteria used? www.aodhealth.org
Was the sample representative? • Yes. Participants were from a nationally representative longitudinal cohort. www.aodhealth.org
Were the subjects sufficiently homogeneous with respect to prognostic risk? • Yes. And the authors adjusted for sex, age, race/ethnicity, parental educational level, and urban residence. www.aodhealth.org
Was follow-up sufficiently complete? • Yes. Retention at one-year follow-up was 87.9%. www.aodhealth.org
Were objective and unbiased outcome criteria used? • Yes. www.aodhealth.org
What Are the Results? • How likely are the outcomes over time? • How precise are the estimates of likelihood? www.aodhealth.org
How likely are the outcomes over time? • At follow-up, 4.6% of non-smokers initiated cigarette smoking in the one-year observation period, and 2.1% reported past 30-day cigarette smoking. www.aodhealth.org
How precise are the estimates of likelihood? • Among youths who had never smoked a cigarette at baseline, adjusted odds of any cigarette use initiation were approximately double for ever users of: • e-cigarettes (odds ratio [OR], 2.53; 95% CI, 1.80-3.56) • hookah (OR, 1.79; 95% CI, 1.23-2.62) • noncigarette combustible tobacco (OR, 1.64; 95% CI, 1.06-2.54) • smokeless tobacco (OR, 1.66; 95% CI, 1.00-2.76) compared with never users (Table 2). • Odds of past 30-day cigarette use at follow-up were also approximately double for ever users of e-cigarettes (OR, 1.87; 95% CI, 1.15-3.05), hookah (OR, 1.92; 95% CI, 1.17-3.17), noncigarette combustible tobacco (OR, 1.78; 95% CI, 1.00-3.19), and smokeless tobacco (OR, 2.07; 95% CI, 1.10-3.87) compared with never users. www.aodhealth.org
How Can I Apply the Resultsto Patient Care? • Were the study patients and their management similar to those in my practice? • Was follow-up sufficiently long? • Can I use the results in the management of patients in my practice? www.aodhealth.org
Were the study patients similar to those in my practice? • The study population was large, 49% female, 53% white, 14% African American, 22% Latino, and 80% urban-dwelling. www.aodhealth.org
Was follow-up sufficiently long? • Yes. www.aodhealth.org
Can I use the results in the management of patients in my practice? • Yes. This study demonstrates that use of any nicotine-based product by adolescents is associated with cigarette smoking initiation; this risk should be considered among the public health harms of these products. • Efforts to regulate these products using strategies known to reduce youth cigarette use should be applied broadly to nicotine-containing non-cigarette products. www.aodhealth.org