Addiction is a major public health issue. According to the World Health Organization (2024), approximately 400 million people worldwide suffer from alcohol- or drug-related disorders, resulting in nearly 3.2 million deaths per year. In France, the situation is also cause for concern: approximately three million people engage in risky alcohol consumption, thirteen million smoke daily, and nearly one and a half million use illicit drugs, primarily cannabis. Addiction, defined by the National Institute on Drug Abuse (NIDA) as a chronic, relapsing brain disorder, is characterized by the compulsive pursuit and use of a substance despite knowledge of its harmful effects. Its development depends on multiple factors: personal (trauma, psychiatric disorders, genetic predispositions), environmental (stress, isolation, family context), and those related to the substance itself (addictive potential). The diagnosis of substance use disorders is based on 11 criteria defined in the \*Diagnostic and Statistical Manual of Mental Disorders\* (DSM-5), the main ones being: loss of self-control, interference of substance use with academic or occupational activities, continued use despite awareness of the problems it causes, and a new central criterion, craving, defined as an irresistible urge to use, which serves as both a symptom and a diagnostic and prognostic marker because it is a predictor of relapse. The cumulative total of criteria allows the disorder to be classified as mild (2-3), moderate (4-5), or severe (≤ 6). Since the 2020 health crisis, researchers have observed an increase in the use of psychoactive substances, particularly among vulnerable populations. Despite public policy efforts and treatment programs, relapses remain common after treatment, affecting 60 to 70% of patients within six months of their hospitalization. This phenomenon is also observed at La Musse Hospital, where many patients admitted to the nutrition and alcoholism unit express a sense of emptiness upon returning home: a void in relationships, therapy, and daily activities. This feeling often contributes to a return to substance use. To address these relapses, this study aims to evaluate the impact of a post-hospitalization equine-assisted therapy program on the mental health and addictive behaviors of patients receiving addiction treatment. Already used at La Musse Hospital as part of the care pathway, equine-assisted therapy is based on the interaction between the patient and the horse in a therapeutic setting. Several studies have demonstrated the benefits of this approach on emotional regulation, self-confidence, stress management, and overall well-being. This prospective, single-center, interventional study will include twenty-two patients who have been hospitalized at least once in the nutrition and alcoholism unit at La Musse Hospital or another facility. Participants will be randomly assigned to either a group receiving post-hospitalization equine-assisted therapy or a control group.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
22
Patients in the experimental group will receive 22 sessions of equine-assisted therapy over a 24-week period (Figure 2). The objective of this protocol is to provide a phased transition toward a gradual return to their daily lives. To this end, two equine-assisted therapy sessions per week will be conducted for 1 month (8 sessions), followed by one session per week for 2 months (8 sessions), and finally one session every two weeks for 3 months (6 sessions). Each session will last 1 hour and 30 minutes, with groups of 4 patients, led by 2 professionals from the equine therapy center at La Musse Hospital.
The score on the Craving Experience Questionnaire
The score on the Craving Experience Questionnaire (CEQ-F). This questionnaire retrospectively assesses the intensity and frequency of cravings over a specific time period. The CEQ allows for the assessment of cravings for a variety of substances, including alcohol, cigarettes, drugs, or food. The CEQ exhibits excellent psychometric properties (May et al., 2014). This questionnaire enables the calculation of a craving intensity score for a specific substance or food based on the 11 intensity items. Each item is rated on a scale from 0 ("Not at all") to 10 ("Extremely"). Summing these 11 scores yields a total craving intensity score ranging from 0 to 110. The higher the score, the more intense the participant's craving is considered to be. Additionally, the craving frequency score obtained by the CEQ can be calculated by adding the values obtained for the 11 items corresponding to frequency. Each item in this section is rated on a
Time frame: at the start of the program (week 1), then 5 weeks, 13 weeks, 25 weeks, and 37 weeks after the start of the program.
The total score on the Beck Depression Inventory
The Beck Depression Inventory is one of the most widely used screening tools for measuring the severity of depression in adults and adolescents over the age of 13. It consists of 21 items related to depressive symptoms (e.g., hopelessness and irritability), cognitions (e.g., guilt or feelings of being punished), and physical symptoms (e.g., fatigue, weight loss, and loss of interest in sex). Each item is rated on a severity scale ranging from 0 to 3, with a total score ranging from 0 to 63. The higher the score, the more severe the depression.
Time frame: at the start of the program (week 1), then 5 weeks, 13 weeks, 25 weeks, and 37 weeks after the start of the program.
The total score on the Beck Anxiety Inventory
As with depression, the Beck Anxiety Inventory consists of 21 items corresponding to anxiety symptoms identified in large clinical samples (e.g., panic disorder and generalized anxiety disorder). Each item is rated on a severity scale ranging from 0 (not at all) to 3 (very much), with a total score ranging from 0 to 63. The higher the score, the more severe the anxiety.
Time frame: at the start of the program (week 1), then 5 weeks, 13 weeks, 25 weeks, and 37 weeks after the start of the program.
The number of relapses
The number of relapses recorded in the logbook, which the patient fills out themselves throughout the study (weekly), thereby assessing their addictive behaviors
Time frame: Each week, up to 37 weeks
The number, intensity, and duration of self-reported cravings
The number, intensity, and duration of self-reported cravings, recorded in the logbook completed by the patient throughout the study
Time frame: Each week, up to 37 weeks
Scores on the WHOQOL-BREF quality of life questionnaire
With 26 items, the WHOQOL-BREF is a shortened version of the WHOQOL-100, an instrument designed to measure subjective quality of life. This is defined as an individual's perception of their own life situation within the context of their culture and value system, as well as in relation to personal goals, expectations, evaluation criteria, and interests. The WHOQOL-BREF was developed as a generic quality of life questionnaire and is therefore not limited to specific areas of application. The questionnaire is completed by the respondent. The WHOQOL-BREF covers the four domains of physical health, psychological well-being, social relationships, and environment. Items are rated on a five-point scale (from "not at all" to "somewhat no," "about," "most of the time," to "completely"). The scales exhibit very high internal consistency. The WHOQOL has received widespread international support and is available in multiple languages. It is validated and reliable.
Time frame: at the start of the program (week 1), then 5 weeks, 13 weeks, 25 weeks, and 37 weeks after the start of the program.
Scores on the WHO-5 Well-Being Questionnaire
The WHO-5 is a measure of mental well-being consisting of five statements referring to the past two weeks. Each statement is rated on a 6-point scale, with higher scores indicating better mental well-being. The instrument has been translated into more than 30 languages.
Time frame: at the start of the program (week 1), then 5 weeks, 13 weeks, 25 weeks, and 37 weeks after the start of the program.
Physical health scores
The 6-minute walk test (6MWT), Timed Up and Go Test (TUG) and the numerical Pain Scale.
Time frame: at the start of the program (week 1), then 5 weeks, 13 weeks, 25 weeks, and 37 weeks after the start of the program.
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