Digital Image Analysis of Cigarette Filter Stains As an Indicator of Compensatory Smoking
2565 Short Communication Digital Image Analysis of Cigarette Filter Stains as an Indicator of Compensatory Smoking Andrew A. Strasser,1 Richard J. O’Connor,2 Marc E. Mooney,3 and E. Paul Wileyto1 1Transdisciplinary Tobacco Use Research Center, Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania; 2Tobacco Research Laboratory, Department of Health Behavior, Division of Cancer Prevention and Population Sciences, Roswell Park Cancer Institute, Buffalo, New York; and 3Transdisciplinary Tobacco Use Research Center, University of Minnesota, Minneapolis, Minnesota Abstract Objective: Cigarette filters trap a significant portion of smoking topography were used in a regression model to carcinogen-containing smoke particulate and may provide identify the effect of compensatory smokingon tar stain. an indication of cigarette constituent exposure. A technique Results: Total puff volume was a significant predictor of for quantifying filter tar staining with digital imaging has a*center (redness) [b = 0.003 (SE, 0.0004), R2 = 0.42, t = 7.87, shown predictive value between typical total puff volume P < 0.001] and L*center (lightness) [b = À0.015 (SE, 0.002), and filter tar stain intensity. The current study uses smoking R2 = 0.45, t = À8.18, P < 0.001] for Quest cigarettes and topography data acquired during an examination of compen- a significant predictor of a*center [b = 0.003 (SE, 0.0005), satory smoking of Quest cigarettes and digital analyses of the R2 = 0.37, t = 5.27, P < 0.001] and L*center [b = À0.009 (SE, tar stains of the spent Quest cigarette filters. Due to reduced 0.002), R2 = 0.35, t = À5.05, P < 0.001] for own preferred nicotine levels, we hypothesized compensatory smokingto brand.
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