Promoting Sustainable Return to Work Among Employees on Sick Leave Due to a Mental Health Condition: Evaluation of the HealthyMinds Online Group Intervention

The purpose of this clinical trial is to evaluate the impact of an online group intervention called Healthy Minds in facilitating a sustainable return to work for individuals with a mood disorder. The study aims to answer the following key questions : * Does receiving the Healthy Minds online intervention lead to a more sustainable return to work compared to not receiving the intervention? * Are the health outcomes (e.g., depressive symptoms) and work-related outcomes (e.g., work functioning) of individuals who receive the Healthy Minds online intervention better than those who do not receive the intervention in the year following the intervention? Both experimental and control participants will be recruited at baseline while on sick leave (expected to return to work in less than one month) or recently returned to work (less than one month). Participants will complete a series of online questionnaires at the following time points : * Baseline * First follow-up (2 months after baseline) * Second follow-up (6 months after baseline) * Third follow-up (12 months after baseline) The questionnaires will cover the following areas : * Sociodemographic and biopsychosocial factors * Symptoms associated with the primary mood disorder * Cognitive difficulties and biaises * Self-efficacy related to return to work * Work accommodations and natural supports * Relationship with immediate supervisor * Work functioning * Return to work time (number of days away from work) Experimental participants will participate in the 2-month online Healthy Minds group intervention (cohort of 5 participants) between the baseline assessment and the first follow-up. The intervention consists of 8 sessions (one per week for 8 weeks), with each session focusing on a specific aspect of the return-to-work process from a cognitive-behavioral perspective.