Substance Use Disorders (SUD) are associated with cognitive schemas that lead to care attrition and mistrust towards care. Considering this, establishing a strong, trustful relationship between the patient and the healthcare team is important to promote patient engagement within SUD management. However, it requires an important availability of the healthcare team, allowing for frequent interactions at all times, including at night and during days off. We postulated that a mobile application called MAURISSE, which aims to help the caregivers maintaining a link with the patient in order to facilitate trust in the relationship, could foster patient engagement as well as the therapeutic alliance.

This research aims to compare the effect of the application MAURISSE on the therapeutic alliance in a population of patients treated for a disorder related to substance use at the Toulouse University Hospital.

Substance Use Disorders (SUD) are frequently associated with other mental disorders, especially Borderline Personality Disorder, thus defining co-occurring substance use and mental disorders with borderline and anti-social personality disorders that is often associated with cognitive schemas leading to care attrition and mistrust towards care. The goal of the care intervention within Substance Use Disorders management is therefore to help the patient reduce the use of dysfunctional coping strategies involving substance use. Indeed, the establishment of a trustful relation between the patient and the care team leads the patient into building a secure attachment towards care that could secondly be generalized in other situations. We designed an application called MAURISSE, which aims to help the caregivers maintaining a link with the patient in order to facilitate a more secure attachment, thus enabling trust in the relationship as well as fostering patient engagement in the care.

Inclusion Criteria:

• Patient over 18 years old,
• Starting specialized treatment for addiction (addiction to substance and behavioral addiction too as money games addiction).
• Suffering from any type of addiction, with an active addiction requiring weekly monitoring of substance use.
• possessing a smartphone or having access to a smartphone and having access to an internet connection.
• Able to read and understand French.
• Affiliated or beneficiary of a social security scheme.
• Free, informed and written consent signed by the participant and the investigator (at the latest on the day of inclusion and before any examination required by the research).

Exclusion Criteria:

• Patient with cognitive or psychiatric disorders that may affect their ability to consent.
• Participation in another protocol involving a modification of the treatment for addiction.
• Known or suspected pregnancy.
• Person under legal protection.