Evaluation Study of Medical-Social Collaboration Model for Middle-aged and Older Adults With Depressive Symptoms

After initial clinical assessment, participants will be offered interventions based on their depressive symptom severity (Patient Health Questionnaire-9-item \[PHQ-9\]). Mild symptoms (PHQ-9=5-9): 6 weekly low intensity CBT-based group intervention sessions led by trained clinical social workers, with 2 booster sessions as necessary. Moderate symptoms (PHQ-9=10-14): 6 weekly high intensity CBT-based group intervention sessions led by trained clinical social workers, with 2 booster sessions as necessary. Moderately severe symptoms (PHQ-9≥15): high intensity individual or group CBT-based intervention. Trained peer supporters will be matched to participants to walk them through the process with regular follow-up.

The booklet incorporates components of behavioural activation, which encourages participants to engage in meaningful activities in daily life to change their mood. Trained research assistants will regularly check in with the participants to monitor their depressive symptoms.