Maureen A Walton1, Quyen Epstein-Ngo2, Patrick M Carter3, Marc A Zimmerman4, Frederic C Blow5, Anne Buu6, Jason Goldstick7, Rebecca M Cunningham3. 1. University of Michigan Injury Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI 48109, USA; University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI 48109, USA. Electronic address: waltonma@umich.edu. 2. University of Michigan Injury Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI 48109, USA; Institute on Women and Gender Studies, University of Michigan, 500 South State St., Ann Arbor, MI 48109, USA. 3. University of Michigan Injury Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI 48109, USA; Michigan Youth Violence Prevention Center, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA; Department of Emergency Medicine, University of Michigan School of Medicine, 1500 East Medical Center Drive, Ann Arbor, MI 48105, USA; Department of Emergency Medicine, Hurley Medical Center, 1 Hurley Plaza, Flint, MI 48503, USA. 4. University of Michigan Injury Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI 48109, USA; Michigan Youth Violence Prevention Center, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA; Department of Health Behavior and Health Education, University of Michigan School of Public Health, 1415 Washington Heights 3790A SPH I, Ann Arbor, MI 48109, USA. 5. University of Michigan Injury Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI 48109, USA; University of Michigan Addiction Center, Department of Psychiatry, University of Michigan School of Medicine, 4250 Plymouth Road, Ann Arbor, MI 48109, USA. 6. Department of Health Behavior and Biological Sciences, University of Michigan School of Nursing, 400 North Ingalls, Room 4346, Ann Arbor, MI 48109, USA. 7. University of Michigan Injury Center, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC10-G080, Ann Arbor, MI 48109, USA.
Abstract
AIMS: This paper examined longitudinal marijuana use trajectories among drug-using youth presenting to the ED to inform intervention development. METHODS: Given interest in substance use and violence, this study oversampled those presenting with assault injuries. Assault-injured youth (ages 14-24) endorsing past 6-month drug use (n=349), and a sex and age proportionally-sampled comparison group (n=250) endorsing drug use, completed a baseline assessment and follow-ups at 6, 12, 18, and 24 months. Latent class trajectory analyses examined days of marijuana use over 2 years. Multinomial regression analyses examined baseline, 12-month and 24-month factors associated with substance use trajectory groups. RESULTS: Trajectory analyses identified 5 groups: Low (Low; 28.2%; n=169); Intermittent (INT; 16.2%; n=97); Moderate Decline (MD; 12.0%; n=72); High decline (HD, 13.2%; n=79) and Chronic (C; 30.4%; n=182). At baseline, as compared to the Low group, the other trajectory groups were more likely to be male and have greater levels of physical aggression. At 12- and 24-months, negative and positive peer influences, incarceration and community violence were additional characteristics associated with the greater marijuana use trajectories (as compared to the Low group). CONCLUSIONS: Interventions for drug-using youth presenting to the urban ED should address peer influences, physical aggression and community violence exposure, given the association between these characteristics and greater marijuana use trajectories.
AIMS: This paper examined longitudinal marijuana use trajectories among drug-using youth presenting to the ED to inform intervention development. METHODS: Given interest in substance use and violence, this study oversampled those presenting with assault injuries. Assault-injured youth (ages 14-24) endorsing past 6-month drug use (n=349), and a sex and age proportionally-sampled comparison group (n=250) endorsing drug use, completed a baseline assessment and follow-ups at 6, 12, 18, and 24 months. Latent class trajectory analyses examined days of marijuana use over 2 years. Multinomial regression analyses examined baseline, 12-month and 24-month factors associated with substance use trajectory groups. RESULTS: Trajectory analyses identified 5 groups: Low (Low; 28.2%; n=169); Intermittent (INT; 16.2%; n=97); Moderate Decline (MD; 12.0%; n=72); High decline (HD, 13.2%; n=79) and Chronic (C; 30.4%; n=182). At baseline, as compared to the Low group, the other trajectory groups were more likely to be male and have greater levels of physical aggression. At 12- and 24-months, negative and positive peer influences, incarceration and community violence were additional characteristics associated with the greater marijuana use trajectories (as compared to the Low group). CONCLUSIONS: Interventions for drug-using youth presenting to the urban ED should address peer influences, physical aggression and community violence exposure, given the association between these characteristics and greater marijuana use trajectories.
Authors: Rebecca M Cunningham; Patrick M Carter; Megan Ranney; Marc A Zimmerman; Fred C Blow; Brenda M Booth; Jason Goldstick; Maureen A Walton Journal: JAMA Pediatr Date: 2015-01 Impact factor: 16.193
Authors: Maureen A Walton; Stephen T Chermack; Jean T Shope; C Raymond Bingham; Marc A Zimmerman; Frederic C Blow; Rebecca M Cunningham Journal: JAMA Date: 2010-08-04 Impact factor: 56.272
Authors: Jason E Goldstick; Sarah A Stoddard; Patrick M Carter; Marc A Zimmerman; Maureen A Walton; Rebecca M Cunningham Journal: Am J Drug Alcohol Abuse Date: 2016-06-17 Impact factor: 3.829
Authors: Stephen N Oliphant; Charles A Mouch; Ali Rowhani-Rahbar; Stephen Hargarten; Jonathan Jay; David Hemenway; Marc Zimmerman; Patrick M Carter Journal: J Behav Med Date: 2019-08-01
Authors: Patrick M Carter; Aaron D Dora-Laskey; Jason E Goldstick; Justin E Heinze; Maureen A Walton; Marc A Zimmerman; Jessica S Roche; Rebecca M Cunningham Journal: Am J Prev Med Date: 2018-10-19 Impact factor: 5.043
Authors: Patrick M Carter; Charles A Mouch; Jason E Goldstick; Maureen A Walton; Marc A Zimmerman; Ken Resnicow; Rebecca M Cunningham Journal: Prev Med Date: 2019-11-11 Impact factor: 4.018
Authors: Rebeccah L Sokol; Patrick M Carter; Jason Goldstick; Alison L Miller; Maureen A Walton; Marc A Zimmerman; Rebecca M Cunningham Journal: Am J Prev Med Date: 2020-05-16 Impact factor: 5.043
Authors: Erin E Bonar; Jason E Goldstick; Rebecca M Cunningham; Anne C Fernandez; Alan K Davis; Mark A Ilgen; Maureen A Walton Journal: Alcohol Alcohol Date: 2019-07-01 Impact factor: 2.826
Authors: Aaron D Dora-Laskey; Jason E Goldstick; Lisa Buckley; Erin E Bonar; Marc A Zimmerman; Maureen A Walton; Rebecca M Cunningham; Patrick M Carter Journal: Subst Use Misuse Date: 2019-09-10 Impact factor: 2.164
Authors: Jessica S Roche; Michael J Clery; Patrick M Carter; Aaron Dora-Laskey; Maureen A Walton; Quyen M Ngo; Rebecca M Cunningham Journal: Acad Emerg Med Date: 2018-10-31 Impact factor: 3.451
Authors: Jason E Goldstick; Kipling M Bohnert; Alan K Davis; Erin E Bonar; Patrick M Carter; Maureen A Walton; Rebecca M Cunningham Journal: Alcohol Alcohol Date: 2018-11-01 Impact factor: 2.826
Authors: Sarah A Stoddard; Elizabeth Meier-Austic; Quyen Epstein-Ngo; Maureen Walton; Patrick M Carter; Justin E Heinze; Marc A Zimmerman; Rebecca Cunningham Journal: Drug Alcohol Depend Date: 2020-06-15 Impact factor: 4.492