Personal2025
D-Face (Depression Screening)
PHQ-9 Depression Screening Web Application
Role
Full Stack Developer
Year
2025
Team
Solo Project
Tech Stack
Next.js, MySQL, Prisma
A web application for initial depression screening using the standard PHQ-9 questionnaire. This project was built as a hands-on exercise to implement a rule-based scoring system that evaluates responses against predefined criteria. It includes an information page, an assessment flow, and a history view for reviewing past results. After submission, the system calculates the total score, maps it to a severity level, and provides immediate preliminary guidance.
01 The Problem
- Needed a consistent, criteria-based evaluation system aligned with PHQ-9 scoring rules as a foundation for a health-oriented web app practice project.
- Users should receive immediate results and preliminary guidance after completing the assessment to understand their score and next steps.
- Required supporting pages—educational content and a result history—to help users learn and track their assessment trends over time.
02 The Solution
- Implemented the standard PHQ-9 (9 questions) as a straightforward, user-friendly form with completeness checks before evaluation.
- Built a rule-based scoring and severity mapping mechanism, then generated a result summary and appropriate preliminary recommendations instantly after submission.
- Added an information section to explain the purpose and context of the screening, and a history page to review past results and observe score changes.
03 The Result
- Users can complete the PHQ-9 assessment and receive an immediate score summary with severity classification and preliminary guidance.
- A dedicated history view enables convenient review of previous assessments and trend tracking over time.
- Delivered a clear, criteria-driven prototype suitable for further iteration and feature expansion.
Project Gallery
PHQ-9 Assessment Screen
Results & History View
