Marc Walter
Biographic Data
| ID | 3748205 |
|---|---|
| NAME | Marc Walter |
| GIVEN NAMES | Marc |
| FAMILY NAME | Walter |
| SIGNATURE | WALTER M |
| AFFILIATIONS | University of Basel |
| ORCID | 0000-0002-2238-2017 |
| VERIFIED | Yes |
| TOTAL WORKS | 26 |
| TOTAL CITATIONS | 2 |
| AUTHOR COUNT | 26 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2009 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Stability of exercise addiction symptoms and co-occurring mental disorders – a follow-up study
This data suggests that EA is a temporary stable and distinct disorder with affected individuals suffering from severe psychological distress. Further studies are necessary to investigate potential cause-effect relationships between co-occurring mental disorders and EA
Evaluation of treatment costs for direct versus stepwise admission to home treatment
HT as a standalone treatment showed cost efficiency and reduced readmission rates, positioning it as a promising alternative to inpatient care. However, combining HT with inpatient treatment increased duration and costs, undermining the financial benefits. Future research should identify patient groups that benefit most from direct HT admission and explore hybrid models integrating short-term inpatient interventions followed by HT to enhance cost…
Cannabis use and its association with psychopathological symptoms in a Swiss adult population: A cross-sectional analysis
ADHD and depressive symptoms correlate with increased cannabis use in a cohort of regular users, suggesting potential self-medication in nonclinical populations. With the rising availability of cannabis worldwide, these results highlight the necessity for longitudinal studies to disentangle the complex dynamics between cannabis consumption and mental health symptoms
Brain alterations in individuals with exercise dependence: A multimodal neuroimaging investigation
Evaluating the Psychometric Properties of the German Self and Interpersonal Functioning Scale (Sifs)
The Self and Interpersonal Functioning Scale (SIFS) is a 24-item self-report questionnaire assessing personality functioning according to the alternative DSM-5 model for personality disorders. We evaluated the German SIFS version in a total sample of 886 participants from Germany and Switzerland. Its factor structure was investigated with confirmatory factor analysis comparing bifactor models with two specific factors (self- and interpersonal fun…
Effects of cannabis regulation in Switzerland: Study protocol of a randomized controlled trial
ClinicalTrials.gov (NCT05522205). https://clinicaltrials.gov/ct2/show/NCT05522205
Experiences with take-home dosing in heroin-assisted treatment in Switzerland during the Covid-19 pandemic–Is an update of legal restrictions warranted
Heroin-assisted treatment comprises the use of diacetylmorphine (pharmaceutical heroin) for individuals with severe opioid use disorder. In Switzerland, take-home doses in heroin-assisted treatment are more strictly regulated as compared to conventional opioid agonist treatment. In light of the COVID-19 pandemic, the Swiss Federal Council provisionally adapted its policy, allowing for longer prescriptions of take-home diacetylmorphine. Before the…
Individuals at Risk of Exercise Addiction Have Higher Scores for Depression, ADHD, and Childhood Trauma
BackgroundExercise addiction is increasingly being recognized as a psychologically and physically burdensome set of symptoms. However, little is known about the psychiatric profiles of individuals who are at risk. It is well-established that individuals affected by substance use disorders frequently suffer from depression, attention deficit hyperactivity disorder (ADHD), and experiences of childhood trauma. The aim of this study is to determine w…
Psy-Flex: A contextually sensitive measure of psychological flexibility
Psychological flexibility is increasingly studied in various contexts including clinical studies. The construct has been hypothesized to be a major determinant of mental health. Existing measures lack context-sensitivity (e.g, implicitly measuring it as a trait) and/or reference to a limited time frame. We developed a short self-report measure that covers all facets of the construct and is context-sensitive. Data was collected from four separate …
Case Report: CBD Cigarettes for Harm Reduction and Adjunctive Therapy in a Patient With Schizophrenia and Substance Use Disorder
The treatment of patients with schizophrenia and substance use disorder poses a challenge for clinicians. Continued use of cannabis and cocaine can exacerbate psychotic symptoms and worsen the course of disease. To date, no pharmacotherapy is available for patients with cannabis use disorder (CUD). Cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC) are the main active constituents in Cannabis sativa , with the latter being linked to an increased…
Mental Disorders in Individuals With Exercise Addiction—A Cross-Sectional Study
Background and Aims: Exercise addiction has not yet been designated as an addictive disorder in the DSM-5 due to a lack of detailed research. In particular, associations with other psychiatric diagnoses have received little attention. In this study, individuals with a possible exercise addiction are clinically assessed, in order to establish a profile of co-occurring psychiatric disorders in individuals with exercise addiction. Methods: One hundr…
How a Depressive Medical Doctor Profited in the Long-Term from a New and Short Psychological Group-Treatment against Major Depressive Disorder
Background: Individuals suffering from major depressive disorder (MDD) often describe workplace-related stress as one of the main causes of their disorder. Here, we present the story of a 33 year old "Bob" (a pseudonym) who suffered from a moderate (Hamilton-21 = 18) major depressive episode. Workplace-related stress seemed to be the main stressor for Bob at the time. We were interested in long-lasting effects of a newly established group called …
A Typical Case Report: Internet Gaming Disorder Psychotherapy Treatment in Private Practice
Background : Online or internet gaming disorder (IGD) is currently not recognized as a mental disorder in the actual Diagnostic and Statistical Manual of Mental Disorders (DSM-5), although it is an emerging disease. Non-substance-related addictions often have similarities with substance addictions. It is therefore important to have a good understanding of the client but also to have a good endurance. Due to the rise of e-sports, there is an antic…
Opening the Doors of a Substance Use Disorder Ward—Benefits and Challenges From a Consumer Perspective
Open doors in psychiatry have been a subject of controversy in recent years. While some studies postulate the clinical necessity of closed doors, others challenge the theoretical advantages of this setting, mention numerous drawbacks of closed wards, and focus on the advantages of open-door settings. With regard to patients diagnosed with substance use disorders (SUD), other standards may apply. Very little research has been done on this topic. S…
A Two-Day Acceptance and Commitment Therapy (ACT) Workshop Increases Presence and Work Functioning in Healthcare Workers
These findings provide support that ACT interventions motivate healthcare workers to work and increase their patients' treatment quality. To our knowledge this is the first study showing an ACT workshop in healthcare workers can influence HoNOS outcome in the treated patients
Treatment of a Complex Personality Disorder Using Repeated Doses of LSD—A Case Report on Significant Improvements in the Absence of Acute Drug Effects
A 39-year-old female patient suffering from severe, treatment-resistant depression and other symptoms associated with a complex personality disorder was admitted to our open psychiatric ward for an experimental treatment with lysergic acid diethylamide (LSD). The substance was administered in repeated weekly and ascending doses. Curiously, there were no substantial acute subjective effects of the drug despite adequate dosing, which was also confi…
Excessive Exercise—A Meta-Review
Background and Aims: While a number of studies have reported on individuals who exercise excessively, and feel unable to stop despite negative consequences, there is still insufficient evidence to categorize exercise as an addictive disorder. The aim of this meta-review is to summarize the published articles and to compile a list of symptoms reported in the qualitative literature in conjunction with excessive exercise. This list is compared with …
Treatment sensitivity: Its importance in the measurement of psychological flexibility
Narrative Case Notes Have the Potential to Predict Seclusion 3 Days in Advance: A Mixed-Method Analysis
Objectives: Current risk assessment tools can predict problematic behavior and the need for coercive measures, but only with a moderate level of accuracy. The aim of this study was to assess antecedents and triggers of seclusion. Methods: Narrative notes of health care professionals on psychiatric inpatients were analyzed daily starting 3 days prior to seclusion in the case group ( n = 26) and compared to a matched control group without seclusion…
Cannabis use in Switzerland 2015–2045: A population survey based model
Chronic High-Dose Buprenorphine Does Not Block Subjective High from Diacetylmorphine in a Patient in Heroin-Assisted Treatment
We present the case of a 35-year-old woman in heroin-assisted treatment (HAT) expressing the wish for the transition to oral opioid agonist treatment. After failed attempts to change to oral diacetylmorphine and slow-release oral morphine, respectively, she was induced on overlapping buprenorphine (BUP) treatment with the Bernese method. Gradual dose increases to BUP 48 mg per day did not result in attenuation of subjective effects of IV diacetyl…
Association of Substance Use Patterns with Psychiatric Disorders in Homeless Persons with Psychiatric Disorders in Vancouver
Rethinking retention in treatment of opioid dependence—The eye of the beholder
Association of Frontal Gray Matter Volume and Cerebral Perfusion in Heroin Addiction: A Multimodal Neuroimaging Study
Structure and function are closely related in the healthy human brain. In patients with chronic heroin exposure, brain imaging studies have identified long-lasting changes in gray matter (GM) volume. More recently, we showed that acute application of heroin in dependent patients results in hypoperfusion of fronto-temporal areas compared with the placebo condition. However, the relationship between structural and cerebral blood flow (CBF) changes …
Transformation. Ein Konzept zur Erforschung kulturellen Wandels
Individuals at Risk of Exercise Addiction Have Higher Scores for Depression, ADHD, and Childhood Trauma
BackgroundExercise addiction is increasingly being recognized as a psychologically and physically burdensome set of symptoms. However, little is known about the psychiatric profiles of individuals who are at risk. It is well-established that individuals affected by substance use disorders frequently suffer from depression, attention deficit hyperactivity disorder (ADHD), and experiences of childhood trauma. The aim of this study is to determine w…
Gender Differences in Interpersonal Problems of Alcohol-Dependent Patients and Healthy Controls
Alcohol dependence is a heavy burden on patients, their families, and society. Epidemiological studies indicate that alcohol dependence will affect many individuals at some time in their lives, with men affected more frequently than women. Since alcohol-dependent patients often exhibit a lack of social skills and suffer from interpersonal problems, the aim of this study is to elucidate whether men and women experience the same interpersonal probl…
Transformation. Ein Konzept zur Erforschung kulturellen Wandels
Association of Frontal Gray Matter Volume and Cerebral Perfusion in Heroin Addiction: A Multimodal Neuroimaging Study
Structure and function are closely related in the healthy human brain. In patients with chronic heroin exposure, brain imaging studies have identified long-lasting changes in gray matter (GM) volume. More recently, we showed that acute application of heroin in dependent patients results in hypoperfusion of fronto-temporal areas compared with the placebo condition. However, the relationship between structural and cerebral blood flow (CBF) changes …
Rethinking retention in treatment of opioid dependence—The eye of the beholder
Association of Substance Use Patterns with Psychiatric Disorders in Homeless Persons with Psychiatric Disorders in Vancouver
Treatment sensitivity: Its importance in the measurement of psychological flexibility
Narrative Case Notes Have the Potential to Predict Seclusion 3 Days in Advance: A Mixed-Method Analysis
Objectives: Current risk assessment tools can predict problematic behavior and the need for coercive measures, but only with a moderate level of accuracy. The aim of this study was to assess antecedents and triggers of seclusion. Methods: Narrative notes of health care professionals on psychiatric inpatients were analyzed daily starting 3 days prior to seclusion in the case group ( n = 26) and compared to a matched control group without seclusion…
Cannabis use in Switzerland 2015–2045: A population survey based model
Chronic High-Dose Buprenorphine Does Not Block Subjective High from Diacetylmorphine in a Patient in Heroin-Assisted Treatment
We present the case of a 35-year-old woman in heroin-assisted treatment (HAT) expressing the wish for the transition to oral opioid agonist treatment. After failed attempts to change to oral diacetylmorphine and slow-release oral morphine, respectively, she was induced on overlapping buprenorphine (BUP) treatment with the Bernese method. Gradual dose increases to BUP 48 mg per day did not result in attenuation of subjective effects of IV diacetyl…
Opening the Doors of a Substance Use Disorder Ward—Benefits and Challenges From a Consumer Perspective
Open doors in psychiatry have been a subject of controversy in recent years. While some studies postulate the clinical necessity of closed doors, others challenge the theoretical advantages of this setting, mention numerous drawbacks of closed wards, and focus on the advantages of open-door settings. With regard to patients diagnosed with substance use disorders (SUD), other standards may apply. Very little research has been done on this topic. S…
A Two-Day Acceptance and Commitment Therapy (ACT) Workshop Increases Presence and Work Functioning in Healthcare Workers
These findings provide support that ACT interventions motivate healthcare workers to work and increase their patients' treatment quality. To our knowledge this is the first study showing an ACT workshop in healthcare workers can influence HoNOS outcome in the treated patients
Treatment of a Complex Personality Disorder Using Repeated Doses of LSD—A Case Report on Significant Improvements in the Absence of Acute Drug Effects
A 39-year-old female patient suffering from severe, treatment-resistant depression and other symptoms associated with a complex personality disorder was admitted to our open psychiatric ward for an experimental treatment with lysergic acid diethylamide (LSD). The substance was administered in repeated weekly and ascending doses. Curiously, there were no substantial acute subjective effects of the drug despite adequate dosing, which was also confi…
Excessive Exercise—A Meta-Review
Background and Aims: While a number of studies have reported on individuals who exercise excessively, and feel unable to stop despite negative consequences, there is still insufficient evidence to categorize exercise as an addictive disorder. The aim of this meta-review is to summarize the published articles and to compile a list of symptoms reported in the qualitative literature in conjunction with excessive exercise. This list is compared with …
Psy-Flex: A contextually sensitive measure of psychological flexibility
Psychological flexibility is increasingly studied in various contexts including clinical studies. The construct has been hypothesized to be a major determinant of mental health. Existing measures lack context-sensitivity (e.g, implicitly measuring it as a trait) and/or reference to a limited time frame. We developed a short self-report measure that covers all facets of the construct and is context-sensitive. Data was collected from four separate …
Case Report: CBD Cigarettes for Harm Reduction and Adjunctive Therapy in a Patient With Schizophrenia and Substance Use Disorder
The treatment of patients with schizophrenia and substance use disorder poses a challenge for clinicians. Continued use of cannabis and cocaine can exacerbate psychotic symptoms and worsen the course of disease. To date, no pharmacotherapy is available for patients with cannabis use disorder (CUD). Cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC) are the main active constituents in Cannabis sativa , with the latter being linked to an increased…
Mental Disorders in Individuals With Exercise Addiction—A Cross-Sectional Study
Background and Aims: Exercise addiction has not yet been designated as an addictive disorder in the DSM-5 due to a lack of detailed research. In particular, associations with other psychiatric diagnoses have received little attention. In this study, individuals with a possible exercise addiction are clinically assessed, in order to establish a profile of co-occurring psychiatric disorders in individuals with exercise addiction. Methods: One hundr…
How a Depressive Medical Doctor Profited in the Long-Term from a New and Short Psychological Group-Treatment against Major Depressive Disorder
Background: Individuals suffering from major depressive disorder (MDD) often describe workplace-related stress as one of the main causes of their disorder. Here, we present the story of a 33 year old "Bob" (a pseudonym) who suffered from a moderate (Hamilton-21 = 18) major depressive episode. Workplace-related stress seemed to be the main stressor for Bob at the time. We were interested in long-lasting effects of a newly established group called …
A Typical Case Report: Internet Gaming Disorder Psychotherapy Treatment in Private Practice
Background : Online or internet gaming disorder (IGD) is currently not recognized as a mental disorder in the actual Diagnostic and Statistical Manual of Mental Disorders (DSM-5), although it is an emerging disease. Non-substance-related addictions often have similarities with substance addictions. It is therefore important to have a good understanding of the client but also to have a good endurance. Due to the rise of e-sports, there is an antic…
Experiences with take-home dosing in heroin-assisted treatment in Switzerland during the Covid-19 pandemic–Is an update of legal restrictions warranted
Heroin-assisted treatment comprises the use of diacetylmorphine (pharmaceutical heroin) for individuals with severe opioid use disorder. In Switzerland, take-home doses in heroin-assisted treatment are more strictly regulated as compared to conventional opioid agonist treatment. In light of the COVID-19 pandemic, the Swiss Federal Council provisionally adapted its policy, allowing for longer prescriptions of take-home diacetylmorphine. Before the…
Individuals at Risk of Exercise Addiction Have Higher Scores for Depression, ADHD, and Childhood Trauma
BackgroundExercise addiction is increasingly being recognized as a psychologically and physically burdensome set of symptoms. However, little is known about the psychiatric profiles of individuals who are at risk. It is well-established that individuals affected by substance use disorders frequently suffer from depression, attention deficit hyperactivity disorder (ADHD), and experiences of childhood trauma. The aim of this study is to determine w…
Effects of cannabis regulation in Switzerland: Study protocol of a randomized controlled trial
ClinicalTrials.gov (NCT05522205). https://clinicaltrials.gov/ct2/show/NCT05522205
Cannabis use and its association with psychopathological symptoms in a Swiss adult population: A cross-sectional analysis
ADHD and depressive symptoms correlate with increased cannabis use in a cohort of regular users, suggesting potential self-medication in nonclinical populations. With the rising availability of cannabis worldwide, these results highlight the necessity for longitudinal studies to disentangle the complex dynamics between cannabis consumption and mental health symptoms
Brain alterations in individuals with exercise dependence: A multimodal neuroimaging investigation
Evaluating the Psychometric Properties of the German Self and Interpersonal Functioning Scale (Sifs)
The Self and Interpersonal Functioning Scale (SIFS) is a 24-item self-report questionnaire assessing personality functioning according to the alternative DSM-5 model for personality disorders. We evaluated the German SIFS version in a total sample of 886 participants from Germany and Switzerland. Its factor structure was investigated with confirmatory factor analysis comparing bifactor models with two specific factors (self- and interpersonal fun…
Stability of exercise addiction symptoms and co-occurring mental disorders – a follow-up study
This data suggests that EA is a temporary stable and distinct disorder with affected individuals suffering from severe psychological distress. Further studies are necessary to investigate potential cause-effect relationships between co-occurring mental disorders and EA
Psychology (20 works) · Medicine (18 works) · Psychiatry (18 works) · Clinical Psychology (11 works) · Clinical Psychology (10 works) · Addiction (7 works) · Internal Medicine (7 works) · Cannabis and Cannabinoid Research (5 works) · Eating Disorders and Behaviors (5 works) · Substance Abuse Treatment and Outcomes (4 works)