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1 INTRODUCTION Count outcomes are frequently encountered in health behaviors research. Examples of such data include number of standard drinks containing alcohol consumed,1 number of cigarettes smoked,2 and number of sexual risk behaviors experienced.3 Zero-inflation occurs when there is an excessive proportion of outcome values stacked at zero, which is a common phenomenon, especially with behavioral health outcomes.
Citation Please cite as: Loading authors... Download: Published on 02.05.19 in Vol 21, No 5 (2019): May Preprints (earlier versions) of this paper are available at http://preprints.jmir.org/preprint/13183, first published Dec 19, 2018.
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