A tutorial on count regression and zero-altered count models for longitudinal substance use data
| dc.contributor.author | Atkins, David C. | |
| dc.contributor.author | Baldwin, Scott A. | |
| dc.contributor.author | Zheng, Cheng | |
| dc.contributor.author | Gallop, Roget J. | |
| dc.contributor.author | Neighbors, Clayton | |
| dc.date.accessioned | 2018-02-26T23:09:21Z | |
| dc.date.available | 2018-02-26T23:09:21Z | |
| dc.date.issued | 2013-03 | |
| dc.description.abstract | Critical research questions in the study of addictive behaviors concern how these behaviors change over time: either as the result of intervention or in naturalistic settings. The combination of count outcomes that are often strongly skewed with many zeroes (e.g., days using, number of total drinks, number of drinking consequences) with repeated assessments (e.g., longitudinal follow-up after intervention or daily diary data) present challenges for data analyses. The current article provides a tutorial on methods for analyzing longitudinal substance use data, focusing on Poisson, zero-inflated, and hurdle mixed models, which are types of hierarchical or multilevel models. Two example datasets are used throughout, focusing on drinking-related consequences following an intervention and daily drinking over the past 30 days, respectively. Both datasets as well as R, SAS, Mplus, Stata, and SPSS code showing how to fit the models are available on a supplemental website. | |
| dc.identifier | 10.1037/a0029508 | |
| dc.identifier.citation | Copyright 2013 Psychology of Addictive Behaviors. This is a post-print version of a published paper that is available at: http://psycnet.apa.org/record/2012-22398-001. Recommended citation: Atkins, David C., Scott A. Baldwin, Cheng Zheng, Robert J. Gallop, and Clayton Neighbors. "A Tutorial On Count Regression and Zero-Altered Count Models for Longitudinal Substance Use Data." Psychology of Addictive Behaviors 27, no. 1 (2013): 166-177. doi: 10.1037/a0029508. This item has been deposited in accordance with publisher copyright and licensing terms and with the author’s permission. | |
| dc.identifier.uri | http://hdl.handle.net/10657/2368 | |
| dc.language.iso | en_US | |
| dc.publisher | Psychology of Addictive Behaviors | |
| dc.title | A tutorial on count regression and zero-altered count models for longitudinal substance use data | |
| dc.type | Article |