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Howard-Azzeh M, Wasfi R, Kakkar T, Flynn M, Rotondo J, Schleihauf E, Bowes M, Rees EE. Spatiotemporal epidemiology of substance-related accidental acute toxicity deaths in Canada from 2016 to 2017. BMC Public Health 2024; 24:1641. [PMID: 38898445 PMCID: PMC11188508 DOI: 10.1186/s12889-024-18883-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
OBJECTIVES In Canada, substance-related accidental acute toxicity deaths (AATDs) continue to rise at the national and sub-national levels. However, it is unknown if, where, when, and to what degree AATDs cluster in space, time, and space-time across the country. The objectives of this study were to 1) assess for clusters of AATDs that occurred in Canada during 2016 and 2017 at the national and provincial/territorial (P/T) levels, and 2) examine the substance types detected in AATD cases within each cluster. METHODS Two years of person-level data on AATDs were abstracted from coroner and medical examiner files using a standardized data collection tool, including the decedent's postal code and municipality information on the places of residence, acute toxicity (AT) event, and death, and the substances detected in the death. Data were combined with Canadian census information to create choropleth maps depicting AATD rates by census division. Spatial scan statistics were used to build Poisson models to identify clusters of high rates (p < 0.05) of AATDs at the national and P/T levels in space, time, and space-time over the study period. AATD cases within clusters were further examined for substance types most present in each cluster. RESULTS Eight clusters in five regions of Canada at the national level and 24 clusters in 15 regions at the P/T level were identified, highlighting where AATDs occurred at far higher rates than the rest of the country. The risk ratios of identified clusters ranged from 1.28 to 9.62. Substances detected in clusters varied by region and time, however, opioids, stimulants, and alcohol were typically the most commonly detected substances within clusters. CONCLUSION Our findings are the first in Canada to reveal the geographic disparities in AATDs at national and P/T levels using spatial scan statistics. Rates associated with substance types within each cluster highlight which substance types were most detected in the identified regions. Findings may be used to guide intervention/program planning and provide a picture of the 2016 and 2017 context that can be used for comparisons of the geographic distribution of AATDs and substances with different time periods.
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Affiliation(s)
- Mohammad Howard-Azzeh
- Health Promotion and Chronic Disease Prevention Branch, Substance-Related Harms Division, Public Health Agency of Canada, Ontario, Canada.
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Ontario, Canada.
| | - Rania Wasfi
- Public Health Risk Sciences Division, National Microbiology Laboratory, Public Health Agency of Canada, Quebec, Canada
| | - Tanya Kakkar
- Health Promotion and Chronic Disease Prevention Branch, Substance-Related Harms Division, Public Health Agency of Canada, Ontario, Canada
| | - Mallory Flynn
- Department of Statistics, University of British Columbia, British Columbia, Canada
| | - Jenny Rotondo
- Health Promotion and Chronic Disease Prevention Branch, Substance-Related Harms Division, Public Health Agency of Canada, Ontario, Canada
| | - Emily Schleihauf
- Canadian Public Health Service, Public Health Agency of Canada, Ontario, Canada
| | - Matthew Bowes
- Nova Scotia Medical Examiner Service, Department of Justice, Nova Scotia, Canada
| | - Erin E Rees
- Public Health Risk Sciences Division, National Microbiology Laboratory, Public Health Agency of Canada, Quebec, Canada
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, University of Montreal, Quebec, Canada
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Webster L, Gudin J. Review of Opioid Abuse-Deterrent Formulations: Impact and Barriers to Access. J Pain Res 2024; 17:1989-2000. [PMID: 38854928 PMCID: PMC11162618 DOI: 10.2147/jpr.s457982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/06/2024] [Indexed: 06/11/2024] Open
Abstract
The misuse and abuse of opioid analgesics continue to pose a serious public health concern, but for some patients, opioids remain an important analgesic option. Extended-release (ER) opioid formulations are effective for treating chronic pain and are supported by multiple 12-week efficacy studies. ER opioids often contain a high opioid content, and similar to immediate-release (IR) formulations, are subject to abuse, misuse, and diversion. Unintentional misuse may also occur when ER formulations are manipulated for medicinal administration, such as crushing a dose for easier oral intake. As part of a multipronged strategy designed to fight the opioid epidemic, abuse-deterrent formulations (ADFs) were developed to deter misuse, abuse, and diversion of opioids by making manipulation more difficult and nonoral routes of administration less rewarding. Although ADF opioids have been shown to decrease rates of abuse and diversion, they are not equally effective in terms of deterring manipulation for abuse or misuse. Xtampza ER utilizes DETERx technology, which allows it to retain ER characteristics when chewed or crushed, making it the only ER opioid without a boxed warning against these types of manipulation. OxyContin was also developed as an ADF but uses RESISTEC technology, making the tablet hard to crush and viscous in aqueous solutions. ADF utilization has been hampered by patient access issues, including high prices due to lack of insurance coverage. Postmarket real-world studies demonstrate lower rates of abuse, misuse, and diversion for ADF ER opioids compared with non-ADF formulations. However, similar studies comparing abuse-related effectiveness and health care costs for ADF opioids are warranted if clinicians are expected to utilize these potentially safer opioid formulations. These studies would support further education surrounding the benefits and utilization of ADFs and manipulation potential of different ADFs.
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Affiliation(s)
- Lynn Webster
- Dr. Vince Clinical Research, Overland Park, KS, USA
| | - Jeffrey Gudin
- Department of Anesthesiology and Pain Management, University of Miami, Miller School of Medicine, Miami, FL, USA
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Erinoso O, Daugherty R, Kirk MR, Harding RW, Etchart H, Reyes A, Page K, Fiuty P, Wagner KD. Safety strategies and harm reduction for methamphetamine users in the era of fentanyl contamination: A qualitative analysis. THE INTERNATIONAL JOURNAL OF DRUG POLICY 2024; 128:104456. [PMID: 38761461 DOI: 10.1016/j.drugpo.2024.104456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 05/09/2024] [Accepted: 05/09/2024] [Indexed: 05/20/2024]
Abstract
INTRODUCTION In the United States, methamphetamine use is increasing and the context of its use has changed, with reports of illicitly manufactured fentanyl being mixed with methamphetamine (either deliberately or inadvertently). We explore risk-mitigating actions taken by people who use drugs to protect their health when using methamphetamine in that context. METHODS We conducted qualitative interviews with 48 adults (18+) who used methamphetamine in the past three months at two sites in Nevada, USA and two sites in New Mexico, USA. Interviews were recorded, transcribed, and analyzed using thematic analysis. RESULTS Respondents described two rationales for employing harm reduction strategies. First, to prevent harm from methamphetamine containing illicit fentanyl, and second, to maintain their general wellbeing while using methamphetamine. Regarding methamphetamine containing illicit fentanyl, our findings highlight how respondents employ primary strategies like buying from trusted sources and secondary strategies such as spotting and selective use of harm reduction tools (i.e., fentanyl test strips) to reduce risks. To maintain their general wellbeing, participants reduced their use of methamphetamine as reasonably as possible, and used other substances like marijuana and alcohol alongside methamphetamine to counter the unwanted side effects of methamphetamine (i.e., hallucinations and paranoia). Use of these harm reduction strategies varied within situational and social contexts, and respondents usually developed these strategies based on their lived experiences. CONCLUSION Our findings uniquely demonstrate that people who use methamphetamine prioritize community driven, trust-based strategies within their social networks to mitigate risks in a fentanyl-contaminated drug environment. Additionally, our results indicate that harm reduction behaviors are influenced by multilevel risk environments, which include social, physical, economic, and political factors. Overall, these results highlight the potential for targeted interventions at the network level, which are responsive to complexities and shifts in drug market dynamics- such as illicit fentanyl in methamphetamine.
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Affiliation(s)
- Olufemi Erinoso
- Department of Health Behavior, Policy and Administration Sciences, School of Public Health, University of Nevada, Reno, United States
| | - Robbie Daugherty
- Department of Health Behavior, Policy and Administration Sciences, School of Public Health, University of Nevada, Reno, United States
| | - Mia R Kirk
- Department of Health Behavior, Policy and Administration Sciences, School of Public Health, University of Nevada, Reno, United States
| | - Robert W Harding
- Department of Health Behavior, Policy and Administration Sciences, School of Public Health, University of Nevada, Reno, United States
| | - Haley Etchart
- Department of Health Behavior, Policy and Administration Sciences, School of Public Health, University of Nevada, Reno, United States
| | - Andres Reyes
- Department of Internal Medicine, University of New Mexico Health Sciences, Albuquerque, NM, United States
| | - Kimberly Page
- Department of Internal Medicine, University of New Mexico Health Sciences, Albuquerque, NM, United States
| | - Phillip Fiuty
- New Mexico Health, Albuquerque, New Mexico, United States
| | - Karla D Wagner
- Department of Health Behavior, Policy and Administration Sciences, School of Public Health, University of Nevada, Reno, United States.
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Cuadros DF, Branscum AJ, Moreno CM, MacKinnon NJ. Narrative minireview of the spatial epidemiology of substance use disorder in the United States: Who is at risk and where? World J Clin Cases 2023; 11:2374-2385. [PMID: 37123313 PMCID: PMC10131000 DOI: 10.12998/wjcc.v11.i11.2374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/31/2023] [Accepted: 03/20/2023] [Indexed: 04/06/2023] Open
Abstract
Drug overdose is the leading cause of death by injury in the United States. The incidence of substance use disorder (SUD) in the United States has increased steadily over the past two decades, becoming a major public health problem for the country. The drivers of the SUD epidemic in the United States have changed over time, characterized by an initial heroin outbreak between 1970 and 1999, followed by a painkiller outbreak, and finally by an ongoing synthetic opioid outbreak. The nature and sources of these abused substances reveal striking differences in the socioeconomic and behavioral factors that shape the drug epidemic. Moreover, the geospatial distribution of the SUD epidemic is not homogeneous. The United States has specific locations where vulnerable communities at high risk of SUD are concentrated, reaffirming the multifactorial socioeconomic nature of this epidemic. A better understanding of the SUD epidemic under a spatial epidemiology framework is necessary to determine the factors that have shaped its spread and how these patterns can be used to predict new outbreaks and create effective mitigation policies. This narrative minireview summarizes the current records of the spatial distribution of the SUD epidemic in the United States across different periods, revealing some spatiotemporal patterns that have preceded the occurrence of outbreaks. By analyzing the epidemic of SUD-related deaths, we also describe the epidemic behavior in areas with high incidence of cases. Finally, we describe public health interventions that can be effective for demographic groups, and we discuss future challenges in the study and control of the SUD epidemic in the country.
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Affiliation(s)
- Diego F Cuadros
- Digital Futures, University of Cincinnati, Cincinnati, OH 45206, United States
| | - Adam J Branscum
- Department of Biostatistics, Oregon State University, Corvallis, OR 97331, United States
| | - Claudia M Moreno
- Department of Physiology and Biophysics, University of Washington, Seattle, WA 98195, United States
| | - Neil J MacKinnon
- Department of Population Health Sciences, Augusta University, Augusta, GA 30912, United States
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Turi ER, McMenamin A, Wolk CB, Poghosyan L. Primary care provider confidence in addressing opioid use disorder: A concept analysis. Res Nurs Health 2023; 46:263-273. [PMID: 36611290 PMCID: PMC10033432 DOI: 10.1002/nur.22294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 01/09/2023]
Abstract
Primary care providers (PCPs) are well-positioned to provide care for opioid use disorder (OUD), yet very few address OUD regularly. One contributing factor may be PCPs' lack of confidence in their ability to effectively treat OUD. Evidence demonstrates that clinician confidence in home care and hospital settings is associated with improved care delivery and patient outcomes. However, a conceptual definition of PCP confidence in addressing OUD has yet to be established. The aim of this concept analysis is to enhance conceptual understanding of PCP confidence in addressing OUD and inform future measurement strategies. Following Walker and Avant's method of concept analysis, PubMed, PsycINFO, and Google Scholar were searched in October 2021. Manuscripts were included if they referenced confidence in relation to PCPs who provide care to adult patients with OUD. Studies conducted outside the US and not published in English were excluded. The search resulted in 18 studies which were synthesized to conceptualize PCP confidence in addressing OUD. Defining attributes include self-efficacy, experience, and readiness to address OUD. These attributes may be influenced by organizational culture, training, support, and resources. Consequences of PCP confidence addressing OUD may include improved patient outcomes, improved delivery of and access to OUD care, and PCP attitude changes. This concept analysis-which grounds the concept of PCP confidence in addressing OUD in the theoretical and empirical literature-lays the framework for future measurement of the concept. This represents a critical first step towards developing strategies to enhance PCP confidence in addressing OUD.
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Affiliation(s)
- Eleanor R Turi
- Columbia University School of Nursing, New York, New York, USA
| | - Amy McMenamin
- Columbia University School of Nursing, New York, New York, USA
| | | | - Lusine Poghosyan
- Columbia University School of Nursing, New York, New York, USA
- Columbia University Mailman School of Public Health, New York, New York, USA
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Aram JW, Spencer MRT, Garnett MF, Hedegaard HB. Psychological distress and the risk of drug overdose death. J Affect Disord 2022; 318:16-21. [PMID: 36057284 PMCID: PMC9664726 DOI: 10.1016/j.jad.2022.08.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 06/01/2022] [Accepted: 08/26/2022] [Indexed: 11/24/2022]
Abstract
BACKGROUND Previous research has shown an association between psychological distress and overdose death among specific populations. However, few studies have examined this relationship in a large US population-based cohort. METHODS Data from the 2010-2018 NHIS were linked to mortality data from the National Death Index through 2019. Psychological distress was measured using the Kessler 6 scale. Drug overdose deaths were examined, and deaths from all other causes were included as a comparison group. Cox proportional hazards regression was used to estimate mortality risk by psychological distress level. RESULTS The study population included 272,561 adults. Adjusting for demographic covariates and using no psychological distress as the reference, distress level was positively associated with the risk of overdose death: low (HR = 1.8, 95 % CI = 1.1-2.8), moderate (HR = 4.1, 95 % CI = 2.5-6.7), high (HR = 10.3, 95 % CI = 6.5-16.1). A similar pattern was observed for deaths from all other causes: low (HR = 1.2, 95 % CI = 1.1-1.2), moderate (HR = 1.9, 95 % CI = 1.7-2.0), high (HR = 2.6, 95 % CI = 2.4-2.8). LIMITATIONS Limited substance use information prevented adjustment for this potentially important covariate. DISCUSSION Adults with psychological distress were at greater risk of drug overdose death, relative to those without psychological distress. Adults with psychological distress were also at increased risk of death due to other causes, though the association was not as strong.
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Affiliation(s)
- Jonathan W Aram
- Division of Analysis and Epidemiology, National Center for Health Statistics, Centers for Disease Control and Prevention.
| | - Merianne Rose T Spencer
- Division of Analysis and Epidemiology, National Center for Health Statistics, Centers for Disease Control and Prevention
| | - Matthew F Garnett
- Division of Analysis and Epidemiology, National Center for Health Statistics, Centers for Disease Control and Prevention
| | - Holly B Hedegaard
- Division of Analysis and Epidemiology, National Center for Health Statistics, Centers for Disease Control and Prevention
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Spatial clustering of codeine use and its association with depression: a geospatial analysis of nationally representative South African data. JOURNAL OF AFFECTIVE DISORDERS REPORTS 2022. [DOI: 10.1016/j.jadr.2022.100434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Qeadan F, Egbert J, Barbeau WA, Madden EF, Venner KL, English K. Sexuality and Gender Identity Inequities in Substance Use Disorder and Its Treatment among American Indian, Alaska Native, and Native Hawaiian College Students. Subst Use Misuse 2022; 57:2085-2093. [PMID: 36305843 DOI: 10.1080/10826084.2022.2136490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
BACKGROUND The aim of this study was to investigate inequities in substance use disorder (SUD) diagnosis, opioid misuse, marijuana misuse, SUD treatment utilization, and utilization of university mental health services among sexual and gender minority (SGM) American Indian, Alaska Native, and Native Hawaiian (AI/AN/NH) college students. METHODS Data consisting of 8,103 AI/AN/NH students' responses to the American College Health Association's National College Health Assessment survey from fall 2015 through spring 2019 were utilized for this study. Multivariable logistic regression models were used to compare the odds of SUD diagnosis, opioid misuse, and marijuana misuse in SGM AI/AN/NH students to cisgender, heterosexual peers. Unadjusted odds of SUD treatment utilization and utilization of university mental health services were also evaluated. RESULTS Compared to cisgender females, transgender (aOR = 4.43, 95% CI = 2.67-7.34) and gender diverse (aOR = 2.86, 95% CI = 1.61-5.07) students had significantly higher odds of SUD diagnosis. Similarly, significantly higher odds of SUD diagnosis were observed among sexual minorities, including gay/lesbian (aOR = 2.95, 95% CI = 1.71-5.09) and bisexual (aOR = 1.97, 95% CI = 1.30-2.99) students compared to heterosexual peers. Sexual minority students had significantly higher odds of utilizing university mental health services (uOR = 2.43, 95% CI = 1.22-4.84) than heterosexual peers. Odds of opioid misuse and marijuana misuse were also significantly increased among sexual minority students. CONCLUSIONS AI/AN/NH college students who identify as SGM have higher odds of SUD diagnosis, opioid misuse, and marijuana misuse than their cisgender, heterosexual peers. These findings highlight the need to consider tailored programming for SGM AI/AN/NH students in substance use prevention and intervention efforts in U.S. college settings.
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Affiliation(s)
- Fares Qeadan
- Parkinson School of Health Sciences and Public Health, Loyola University Chicago, Maywood, Illinois, USA
| | - Jamie Egbert
- Parkinson School of Health Sciences and Public Health, Loyola University Chicago, Maywood, Illinois, USA
| | - William A Barbeau
- Parkinson School of Health Sciences and Public Health, Loyola University Chicago, Maywood, Illinois, USA
| | - Erin F Madden
- Department of Family Medicine and Public Health Sciences, Wayne State University, Detroit, Michigan, USA
| | - Kamilla L Venner
- Department of Psychology, Center on Alcohol, Substance Use and Addictions (CASAA), University of New Mexico, Albuquerque, New Mexico, USA
| | - Kevin English
- Albuquerque Area Southwest Tribal Epidemiology Center, Albuquerque, New Mexico, USA
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Kopak AM, Singer AJ. Substance Use Disorder, Bail Reform, and Failure to Appear in Court: Results From a Naturalistic Study. JOURNAL OF DRUG ISSUES 2022. [DOI: 10.1177/00220426221107561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Most adults processed through local correctional facilities report symptoms consistent with substance use disorder and there is growing interest in bail reform to reduce or eliminate financial conditions as a requirement for release from detention in local jails. These practices are endorsed for their ability to reduce jail populations and enhance judicial efficiency, but failure to appear in court has become a major area of concern under these new procedures. The current study examined the associations between substance use disorder, financial release conditions, and failure to appear in court in the context of a naturalistic study of bail reform in one judicial district. Multivariate logistic regression results demonstrate significantly higher odds of failure to appear in court among adults with substance use disorder who received a nonfinancial release from jail. Findings suggest bail reform initiatives must address substance use disorder and provide person-centered services during the pretrial release period to become effective.
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Affiliation(s)
- Albert M. Kopak
- Research Department, UNC Health Sciences at MAHEC, Asheville, NC, USA
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Rudner T, Hume DJ, Larmuth K, Atterbury E, Rauch HGL, Kroff J. Substance use disorder and obesogenic eating: Does working memory training strengthen ability to abstain from unwanted behaviors? A systematic review. J Subst Abuse Treat 2021; 137:108689. [PMID: 34952746 DOI: 10.1016/j.jsat.2021.108689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 10/06/2021] [Accepted: 12/07/2021] [Indexed: 01/03/2023]
Abstract
INTRODUCTION Abstaining from unwanted behaviors requires a sufficient balance between the executive and impulsive cognitive systems. Working memory (WM) is a vital component of both systems, identified in a wide range of research as the central and dominant component of executive function. WM potentially modulates the desires, tendencies, and behaviors specific to and seen in individuals with substance use disorder (SUD) and obesogenic eating (OE). Compared to healthy populations, research has shown individuals with SUD, as well as those who display OE, to have some degree of executive dysfunction, and both conditions have far-reaching health care implications. Additionally, these deficits are associated with impulsive behavior. Research has proposed that impulsive and so-called reward-driven responses could be altered through cognitive therapy and that both SUD and OE could benefit from working memory training (WMT). METHOD In this narrative review, we systematically align extant empirical reasoning and evidence with these assumptions. Our main aim is to ascertain and summarize the value of WMT for the treatment of both SUD and food reward consummatory behaviors. As a means to include detailed narrative accounts of all papers of potential value, our thresholds for meaningful improvements in both WM and unwanted behaviors are broad. RESULTS The results from the eleven qualifying studies are as follows: Nine of ten studies show a significant positive training effect of WMT on one or more components of WM capacity; three of six eligible papers (two on alcohol and one on opioid addiction) deliver notable improvements in SUD in response to WMT. One of two suitable studies showed WMT to be a moderately efficacious form of therapy for OE. Conversely, WMT appears to have negligible therapeutic benefit for cognitive function deficits or psychopathology unrelated to WM, suggesting that WMT has unique treatment efficacy for impulsive human behaviors. CONCLUSION In conclusion, more rigorous and uniform studies on WMT and impulsive harmful behaviors are required to give proof of the benefits of this potential useful treatment.
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Affiliation(s)
- Trinity Rudner
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - David J Hume
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Kate Larmuth
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Elizabeth Atterbury
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
| | - H G Laurie Rauch
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Jacolene Kroff
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa; Health through Physical Activity, Lifestyle and Sport Research Centre (HPALS), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, South Africa
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