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Article ; Online: Longitudinal Associations between Homelessness and Substance Use: Investigating Demographic Differences for Young Adults in Treatment.

DiGuiseppi, Graham T / Prindle, John / Rice, Eric R / Davis, Jordan P

2023 Volume 59, Issue 2, Page(s) 243–253

Abstract: ... ...

Abstract	Objective
MeSH term(s)	Humans ; Female ; Young Adult ; United States/epidemiology ; Male ; Prospective Studies ; Ill-Housed Persons ; Substance-Related Disorders/epidemiology ; Substance-Related Disorders/therapy ; Substance-Related Disorders/complications ; Social Problems ; Ethnicity
Language	English
Publishing date	2023-12-28
Publishing country	England
Document type	Journal Article
ZDB-ID	1310358-1
ISSN	1532-2491 ; 1082-6084
ISSN (online)	1532-2491
ISSN	1082-6084
DOI	10.1080/10826084.2023.2267124
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Article ; Online: Dynamic social network analysis of a brief alcohol intervention trial in heavy-drinking college students shows spillover effects.

Barnett, Nancy P / Light, John M / Clark, Melissa A / Ott, Miles Q / DiGuiseppi, Graham T / Meisel, Matthew K

Alcohol, clinical & experimental research

2024 Volume 48, Issue 2, Page(s) 375–388

Abstract: Background: Heavy-drinking college students tend to have close social networks, and there is theoretical and empirical support for the idea that behavior change can spread through those networks via close ties. The objective of this research was to ... ...

Abstract	Background: Heavy-drinking college students tend to have close social networks, and there is theoretical and empirical support for the idea that behavior change can spread through those networks via close ties. The objective of this research was to determine whether intervention-induced behavior change in a subset of heavy drinkers in a sociometric (whole) college class-year social network is transmitted to other heavy drinkers in the network, resulting in reduced behavioral risk and change in network ties. Methods: We conducted a controlled trial in which most of a first-year college class (N = 1236; 56.9% female) was enrolled, with alcohol use and social network ties measured early in each of three semesters. Following a baseline assessment, the network was divided into two groups, brief motivational intervention (BMI) and natural history control (NHC) according to dormitory residence location. A subset of heavy drinkers in each group was selected, and those in the BMI group received an in-person intervention. Results: Using stochastic actor-oriented modeling, we found a significant tendency for participants in the BMI group to shed ties with individuals with similar drinking behaviors between the first and second semesters, relative to the NHC group. Furthermore, heavy drinkers with reciprocal ties to intervention recipients in the BMI group showed a significant reduction in drinks per week. Conclusions: Individual alcohol interventions appear to have effects both on behavior and network connections among individuals who did not receive the intervention. Continued research is needed to identify the optimal conditions for the diffusion of behavior change.
Language	English
Publishing date	2024-01-19
Publishing country	United States
Document type	Journal Article
ISSN	2993-7175
ISSN (online)	2993-7175
DOI	10.1111/acer.15237
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Article ; Online: Egocentric Network Characteristics and Cannabis Use in a Sample of Young Adult Medical Cannabis Patients and Nonpatient Users.

DiGuiseppi, Graham T / Fedorova, Ekaterina V / Lankenau, Stephen E / Davis, Jordan P / Wong, Carolyn F

Journal of studies on alcohol and drugs

2022 Volume 83, Issue 6, Page(s) 802–811

Abstract: Objective: Social factors play an important role in young adults' substance use behaviors, but little is known about how egocentric social network factors are related to young adults' cannabis use. Young adults also report medicinal and recreational ... ...

Abstract	Objective: Social factors play an important role in young adults' substance use behaviors, but little is known about how egocentric social network factors are related to young adults' cannabis use. Young adults also report medicinal and recreational uses of cannabis, which may alter the strength of these relationships. Therefore, medical cannabis patient status and medicinal/recreational orientation toward cannabis were examined as moderators of these relationships. Method: Young adult medical cannabis patients ( Results: Only descriptive norms (adjusted incidence rate ratio [aIRR] = 1.19, 95% confidence interval [CI] [1.06, 1.33]) were associated with more frequent use, but not problematic use. Descriptive norms interacted with cannabis use orientation: descriptive norms were positively associated with cannabis use days among medicinally oriented users (aIRR = 1.22, 95% CI [1.02, 1.46]). However, this relationship was stronger for recreationally oriented users (aIRR = 1.62, 95% CI [1.31, 2.01]). No interactions were found predicting problematic use. Conclusions: Descriptive cannabis use norms among one's personal network members are an important variable predicting young adults' cannabis use, but not problematic use. Perceived descriptive norms may be a stronger motivator to use for recreational users than medicinal users.
MeSH term(s)	Humans ; Young Adult ; Medical Marijuana/therapeutic use ; Cannabis ; Surveys and Questionnaires ; Hallucinogens ; Social Networking
Chemical Substances	Medical Marijuana ; Hallucinogens
Language	English
Publishing date	2022-12-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	2266450-6
ISSN	1938-4114 ; 1934-2683 ; 1937-1888 ; 0096-882X
ISSN (online)	1938-4114 ; 1934-2683
ISSN	1937-1888 ; 0096-882X
DOI	10.15288/jsad.21-00286
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Article ; Online: Sex differences in poly-victimization among youth experiencing homelessness prior to substance use treatment.

DiGuiseppi, Graham T / Ring, Colin R / Rice, Eric R / Davis, Jordan P

Child abuse & neglect

2022 Volume 129, Page(s) 105670

Abstract: Background: Poly-victimization is common among youth experiencing homelessness (YEH) and youth in substance use treatment. To date, studies have not examined poly-victimization among these two intersecting populations.: Objective: To examine ... ...

Abstract	Background: Poly-victimization is common among youth experiencing homelessness (YEH) and youth in substance use treatment. To date, studies have not examined poly-victimization among these two intersecting populations. Objective: To examine heterogeneity in lifetime victimization experiences among youth reporting homelessness at substance use treatment entry; identify demographic predictors of victimization class membership; and associations between victimization and clinical characteristics at treatment intake. Participants and setting: 1270 adolescents and young adults reporting past 90-day homelessness in a nationwide substance use treatment data set. Methods: Latent Class Analysis (LCA) and logistic regression were used to examine heterogeneity in poly-victimization experiences, and associations with demographics and clinical characteristics for males and females. Results: Four victimization classes emerged for males, and five victimization classes emerged for females. The prevalence of victimization and trauma characteristics were higher for females, except physical victimization, which was higher for males. Age, race/ethnicity, and sexual minority status were related to poly-victimization class membership, but not consistently across classes. Compared to low or single victimization classes, youth in the poly-victimization class had higher odds of post-traumatic stress disorder, major depressive disorder, and exchange sex (among females); Poly-victimization class membership was not associated with duration of recent homelessness or substance use disorder diagnoses, when compared to low/less complex victimization. Conclusion: High rates of lifetime victimization were found for YEH in substance use treatment, with rates generally higher among females. Trauma-informed interventions are needed to address complex victimization experiences and poor mental health among unstably housed youth in treatment.
MeSH term(s)	Adolescent ; Crime Victims/psychology ; Depressive Disorder, Major ; Female ; Ill-Housed Persons ; Humans ; Male ; Sex Characteristics ; Substance-Related Disorders/epidemiology ; Substance-Related Disorders/psychology ; Young Adult
Language	English
Publishing date	2022-05-12
Publishing country	England
Document type	Journal Article ; Research Support, N.I.H., Extramural
ZDB-ID	799143-5
ISSN	1873-7757 ; 0145-2134
ISSN (online)	1873-7757
ISSN	0145-2134
DOI	10.1016/j.chiabu.2022.105670
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Article ; Online: Understanding Changes in Social Cannabis Use among Young Adults During the COVID-19 Pandemic: A Social Network Analysis.

DiGuiseppi, Graham T / Fedorova, Ekaterina V / Conn, Bridgid / Lankenau, Stephen E / Davis, Jordan P / Ataiants, Janna / Wong, Carolyn F

Cannabis (Research Society on Marijuana)

2023 Volume 6, Issue 1, Page(s) 20–33

Abstract: Introduction: As the COVID-19 pandemic has caused historic morbidity and mortality and disrupted young people's social relationships, little is known regarding change in young adults' social cannabis use following social distancing orders, or other ... ...

Abstract	Introduction: As the COVID-19 pandemic has caused historic morbidity and mortality and disrupted young people's social relationships, little is known regarding change in young adults' social cannabis use following social distancing orders, or other factors associated with such changes before and during the pandemic. Methods: 108 young adult cannabis users in Los Angeles reported on their personal (egocentric) social network characteristics, cannabis use, and pandemic-related variables before (July 2019 - March 2020) and during the COVID-19 pandemic (August 2020 - August 2021). Multinomial logistic regression identified factors associated with increasing or maintaining the number of network members (alters) participants used cannabis with before and during the pandemic. Multilevel modeling identified ego- and alter-level factors associated with dyadic cannabis use between each ego and alter during the pandemic. Results: Most participants (61%) decreased the number of alters they used cannabis with, 14% maintained, and 25% increased. Larger networks were associated with a lower risk of increasing (vs. decreasing); more supportive cannabis-using alters was associated with a lower risk of maintaining (vs. decreasing); relationship duration was associated with a greater risk of maintaining and increasing (vs. decreasing). During the COVID-19 pandemic (August 2020 - August 2021), participants were more likely to use cannabis with alters they also used alcohol with and alters who were perceived to have more positive attitudes towards cannabis. Conclusions: The present study identifies significant factors associated with changes in young adults' social cannabis use following pandemic-related social distancing. These findings may inform social network interventions for young adults who use cannabis with their network members amid such social restrictions.
Language	English
Publishing date	2023-02-07
Publishing country	United States
Document type	Journal Article
ISSN	2578-0026
ISSN (online)	2578-0026
DOI	10.26828/cannabis/2023.01.003
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Article ; Online: Examining indirect effects of advertising exposure on young adults' cannabis and nicotine vaping.

DiGuiseppi, Graham T / Dunbar, Michael S / Tucker, Joan S / Rodriguez, Anthony / Messan Setodji, Claude / Davis, Jordan P / D'Amico, Elizabeth J

Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors

2023 Volume 37, Issue 8, Page(s) 996–1005

Abstract: Objective: To examine longitudinal associations between exposure to two types of advertisements (medical/recreational cannabis and e-cigarette retailers [vape shops]) and young adults' cannabis and nicotine vaping behavior. Positive and negative ... ...

Abstract	Objective: To examine longitudinal associations between exposure to two types of advertisements (medical/recreational cannabis and e-cigarette retailers [vape shops]) and young adults' cannabis and nicotine vaping behavior. Positive and negative expectancies for cannabis and vaping nicotine were examined as mediators of these associations. Method: Secondary analysis of observational data from a longitudinal cohort of young adults recruited from Southern California (Wave 13: Results: Controlling for past-month cannabis and nicotine use and other covariates, there were no significant direct associations of advertising exposure with cannabis and/or nicotine vaping. However, the association between cannabis advertising exposure and vaping (cannabis only) was significantly mediated by positive cannabis expectancies (β = 0.02, Conclusions: Although exposure to cannabis advertisements may not be directly associated with young adults' cannabis vaping 2 years later, the effects of advertising exposure may be exerted indirectly by increasing positive beliefs about cannabis. Implications for public health policy are discussed. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
MeSH term(s)	Humans ; Female ; Young Adult ; Adult ; Male ; Vaping ; Cannabis ; Advertising ; Nicotine ; Electronic Nicotine Delivery Systems
Chemical Substances	Nicotine (6M3C89ZY6R)
Language	English
Publishing date	2023-04-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	2101111-4
ISSN	1939-1501 ; 0893-164X
ISSN (online)	1939-1501
ISSN	0893-164X
DOI	10.1037/adb0000921
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Article ; Online: Predictors of Adolescents' First Episode of Homelessness Following Substance Use Treatment.

DiGuiseppi, Graham T / Davis, Jordan P / Leightley, Daniel / Rice, Eric

The Journal of adolescent health : official publication of the Society for Adolescent Medicine

2020 Volume 66, Issue 4, Page(s) 408–415

Abstract: Purpose: A growing body of research has identified correlates (i.e., predictors) of youth homelessness. However, such risk and protective factors have not been identified for youth receiving substance use treatment. Using characteristics collected at ... ...

Abstract	Purpose: A growing body of research has identified correlates (i.e., predictors) of youth homelessness. However, such risk and protective factors have not been identified for youth receiving substance use treatment. Using characteristics collected at treatment intake, the present study sought to identify predictors of youths' first episode of homelessness during the 12 months after substance use treatment entry. Methods: Data come from a longitudinal study of adolescents (n = 17,911; aged 12-17 years) receiving substance use treatment throughout the U.S. Participants completed surveys at intake and at 3, 6, and 12 months later. Logistic regression and Lasso machine learning regression were used to predict participants' first episode of homelessness in the 12 months after treatment intake. Results: After excluding adolescents reporting previous experiences of homelessness, 5.0% of adolescents reported their first episode of homelessness over the 12 months after treatment intake. The results from logistic and lasso models were generally consistent. Final models revealed that adolescents who were older, male, reported more victimization experiences, mental health problems, family problems, deviant peer relationships, and substance use problems (more treatment episodes and illicit drug dependence) were more likely to report experiencing homelessness. Hispanic/Latino adolescents were less likely to experience homelessness, compared with white adolescents. Conclusions: The results point to the important risk and protective factors that can be assessed at treatment entry to identify adolescents at greater risk of experiencing their first episode of homelessness.
MeSH term(s)	Adolescent ; Child ; Crime Victims/psychology ; Homeless Persons/psychology ; Humans ; Longitudinal Studies ; Male ; Mental Health ; Peer Group ; Substance-Related Disorders/epidemiology ; Substance-Related Disorders/rehabilitation ; United Kingdom
Language	English
Publishing date	2020-02-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	1063374-1
ISSN	1879-1972 ; 1054-139X
ISSN (online)	1879-1972
ISSN	1054-139X
DOI	10.1016/j.jadohealth.2019.11.312
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Article ; Online: Peer selection and influence for marijuana use in a complete network of first-year college students.

Barnett, Nancy P / DiGuiseppi, Graham T / Tesdahl, Eric A / Meisel, Matthew K

Addictive behaviors

2021 Volume 124, Page(s) 107087

Abstract: Background: Marijuana is the most frequently used illicit drug among college students, and there is a need to understand the social processes that contribute to young adults' marijuana use. Substance use behaviors tend to be more similar (homophilous) ... ...

Abstract	Background: Marijuana is the most frequently used illicit drug among college students, and there is a need to understand the social processes that contribute to young adults' marijuana use. Substance use behaviors tend to be more similar (homophilous) among individuals with social ties to one another. However, little is known about whether marijuana use homophily within young adult relationships is due to social selection (seeking out ties with similar marijuana use to one's own) or social influence (adopting similar marijuana use behaviors as one's ties), or both. Methods: Students (N = 1,489; 54.6% female; M Results: Participants were more likely to select peers with similar past 30-day marijuana use as themselves. Concurrently, students' past 30-day marijuana use became more similar to their peers' use over time. Discussion: Evidence for selection and influence effects were highly significant after controlling for network structure and other covariates indicating these processes may work in tandem to increase marijuana use homophily over the first year of college. This highlights the importance of relationships made early in the first-year of college, as these initial peer ties are likely to reinforce marijuana use behaviors that occur within these relationships.
MeSH term(s)	Adolescent ; Female ; Humans ; Male ; Marijuana Smoking/epidemiology ; Marijuana Use/epidemiology ; Peer Group ; Students ; Substance-Related Disorders ; Universities ; Young Adult
Language	English
Publishing date	2021-08-17
Publishing country	England
Document type	Journal Article ; Research Support, N.I.H., Extramural
ZDB-ID	197618-7
ISSN	1873-6327 ; 0306-4603
ISSN (online)	1873-6327
ISSN	0306-4603
DOI	10.1016/j.addbeh.2021.107087
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Article ; Online: Comparing the effectiveness of three substance use interventions for youth with and without homelessness experiences prior to treatment.

DiGuiseppi, Graham T / Tucker, Joan S / Prindle, John J / Henwood, Benjamin F / Huey, Stanley J / Rice, Eric R / Davis, Jordan P

Journal of consulting and clinical psychology

2022 Volume 89, Issue 12, Page(s) 995–1006

Abstract: Objective: Many adolescents and young adults receiving substance use treatment have experienced or are at risk for homelessness. It is unknown whether specific treatment approaches are more or less effective for youth experiencing homelessness (YEH) ... ...

Abstract	Objective: Many adolescents and young adults receiving substance use treatment have experienced or are at risk for homelessness. It is unknown whether specific treatment approaches are more or less effective for youth experiencing homelessness (YEH) compared to stably housed youth. The present study compared the effectiveness of the Adolescent Community Reinforcement Approach, Motivational Enhancement Therapy combined with Cognitive-Behavioral Therapy (MET/CBT), and Treatment as Usual (TAU) for these two groups. Further subgroup differences were investigated by age, sex, and sexual and gender minority status. Method: YEH (n = 855) and a matched sample of stably housed youth (n = 855) were drawn from the Global Appraisal of Individual Needs, a nationwide substance use treatment data set. Multiple-group latent change score modeling was used to examine change in substance use frequency and related problems at baseline, 3-, 6-, and 12-month follow-ups. Results: Results indicated significant declines in substance use frequency and problems during treatment for all intervention groups. The TAU group showed the greatest declines in substance use problems during treatment and the greatest declines in frequency post-treatment. Compared to stably housed youth, YEH entered treatment with greater substance use and problems, and had greater declines in substance use in the MET/CBT group only. Other differences were found by age and sex. Conclusions: Overall, all three substance use interventions appear to be effective in reducing substance use and related problems. TAU and MET/CBT may be particularly effective for YEH in treatment settings. Implications for future research and practice are discussed. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
MeSH term(s)	Adolescent ; Cognitive Behavioral Therapy ; Homeless Persons ; Humans ; Motivational Interviewing ; Sexual and Gender Minorities ; Substance-Related Disorders/therapy ; Young Adult
Language	English
Publishing date	2022-01-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	121321-0
ISSN	1939-2117 ; 0022-006X
ISSN (online)	1939-2117
ISSN	0022-006X
DOI	10.1037/ccp0000704
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Article ; Online: Multiple Minority Stress and Behavioral Health Among Young Black and Latino Sexual Minority Men.

DiGuiseppi, Graham T / Davis, Jordan P / Srivastava, Ankur / Layland, Eric K / Pham, Duyen / Kipke, Michele D

LGBT health

2021 Volume 9, Issue 2, Page(s) 114–121

Abstract: Purpose: ...

Abstract	Purpose:
MeSH term(s)	Adolescent ; Adult ; Cohort Studies ; Hispanic or Latino ; Humans ; Male ; Minority Groups ; Racism ; Sexual and Gender Minorities ; Stress, Psychological/epidemiology ; Young Adult
Language	English
Publishing date	2021-12-16
Publishing country	United States
Document type	Journal Article ; Research Support, N.I.H., Extramural
ZDB-ID	2727303-9
ISSN	2325-8306 ; 2325-8292
ISSN (online)	2325-8306
ISSN	2325-8292
DOI	10.1089/lgbt.2021.0230
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