The impact of inter-survey differences in the definition of current smokeless tobacco use on comparability of US national and state-specific prevalence estimates, 2009–2011

Abstract

BackgroundWe assessed how varying definitions of adult current smokeless tobacco (SLT) use affected overall prevalence estimates. MethodsNational prevalence estimates were from five surveys: 2009–2010 National Health and Nutrition Examination Survey (NHANES), 2009–2010 National Adult Tobacco Survey (NATS), 2010–2011 Tobacco Use Supplement of the Current Population Survey (TUS-CPS), 2010 National Survey on Drug Use and Health (NSDUH), and 2010 National Health Information Survey (NHIS). State-specific prevalence estimates were from three surveys: 2009–2010 NATS, 2010–2011 TUS-CPS, and 2010 Behavioral Risk Factor Surveillance System (BRFSS). Current SLT use definitions were as follows: past 5-day use (NHANES), past 30-day use (NATS and NSDUH), and “every day” or “some days” use (TUS-CPS, NHIS, and BRFSS). Inter-survey variations further existed in number and types of SLT products assessed. ResultsNational prevalence estimates of current SLT use were as follows: NATS (3.9%), NSDUH (3.6%), NHIS (2.8%), NHANES (2.3%), and TUS-CPS (1.6%). State-specific prevalence estimates of SLT use were generally lower for TUS-CPS (median=2.1%, range: 0.5% in California and New York, to 7.2% in Wyoming) compared to either BRFSS (median=4.0%: range: 0.9% in Washington D.C., to 8.2% in Wyoming) or NATS (median=4.7%; range: 1.3% in New Jersey, to 9.8% in Wyoming). ConclusionConcerted efforts are needed among interagency groups to harmonize SLT definition within different surveys.