330 Indoor tanning frequency trends: Data from the National Health Interview Survey 2005-2015

Indoor tanning is associated with a dose-response increase in melanoma risk. Laws and public health campaigns have resulted declining indoor rates, but changes frequency not been reported. We examined among users using the National Health Interview Survey (NHIS) 2005, 2010, 2015. The outcome of interest was past-year tanning, defined as: never (0), rare (1-2), occasional (3-10), regular (11-24), frequent (≥25). Associations between time were investigated adjusted weighted multinomial logistic regression models. Adjusting covariates included sex, age, race/ethnicity, region, healthcare coverage, alcohol use, smoking status, education, income, personal family history skin cancer, phototype. unweighted samples 69,742 531,742,536 participants, respectively. In 2015, compared to larger proportion tanners (41.1% vs. 20.9%), (15.9% 10.1%), (19.8% 10.3%) users, while decreased (23.2% 58.8%) (P<.001). prevalence non-indoor increased from 85.9% 2005 96.0% corresponding decrease 14.1% 4.0%. prevalences significantly across all user frequencies, this most pronounced relative 89.3% (43.0%), (52.4%), (38.9%) users. observed reductions largely driven by tanners. High should be targeted campaigns, given their elevated cancer risk increasing