The multi-center GET.FEEDBACK.GP randomized controlled trial is designed based on patients' needs and preferences. In order to evaluate the effect of feedback in the broader setting of primary care, a total of 1076 primary care patients with elevated levels of depression (PHQ-9 score ≥ 10) will be randomized into three groups who either receive a) patient-targeted and physician-targeted feedback of depression screening results, b) a physician-targeted feedback of depression screening results only, or c) no feedback of screening results. The primary study outcome is depression severity after 6 months, secondary outcomes include the patients' behavior and cognitions after the screening, depression care according to German guideline recommendations and the health economic evaluation.

Major depression is one of the most significant clinical disorders. In primary care, every sixth patient suffers from increased depression level, which is associated with higher risk of suicide, increased risk of onset and progression of chronic physical conditions. Still, depression is under recognized and undertreated in primary care. Moreover, evidence regarding the efficacy of depression screening in primary care is insufficient to draw clear conclusions. Our previous mono-center depression screening trial in cardiac patients, provides first evidence that written patient-targeted feedback improves depression severity, encourages greater patient participation and engagement in mental health. To amplify these effects, the multi-center GET.FEEDBACK.GP randomized controlled trial is now designed based on patients' needs and preferences. In order to evaluate the effect of feedback in the broader setting of primary care, a total of 1076 primary care patients with elevated levels of depression (PHQ-9 score ≥ 10) will be randomized into three groups who either receive a) patient-targeted and physician-targeted feedback of depression screening results, b) a physician-targeted feedback of depression screening results only, or c) no feedback of screening results. The primary study outcome is depression severity after 6 months, secondary outcomes include the patients' behavior and cognitions after the screening, depression care according to German guideline recommendations and the health economic evaluation.

Inclusion Criteria:

• Gender: male, female, diverse
• Maximum Age: no maximum age
• Attendance in primary care with medical consultation
• Age ≥ 18 years;
• Sufficient language skills;
• Informed consent
• Patient Health Questionnaire-9 > 9 points

Exclusion Criteria:

• Life threatening health status;
• Severe somatic or/and psychological disorder that needs urgent treatment;
• Known diagnosis of a depressive disorder
• Current depression treatment
• Acute suicidal tendency;
• Severe cognitive or/and visual difficulties;
• Not being able to fill out questionnaires
• No contact details

In accordance with the ethics approval of the Ethics Committee of the Hamburg Medical Association on April 8, 2019, (approval number PV6031) and the German Research Foundation guidelines for the handling of research data, deidentified data will be made available on request.

Data will become available six months after publication of the main findings. Data will be available for ten years after publication of the main findings.

Data can be requested by the principal investigators. Data use and request underly the publication policy of the multicentre GET.FEEBDACK.GP RCT.