📌 MDV – Japan 🇯🇵

🔍 What is it?

Medical Data Vision (MDV) is one of Japan’s largest hospital-based real-world data (RWD) sources. It collects electronic medical records (EMR) and Diagnosis Procedure Combination (DPC) data from hospitals, providing insights into inpatient and outpatient care, treatment patterns, and healthcare resource utilization.

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📊 Key Features & Scope

📍 Geographical coverage: Japan 🇯🇵 (hospital-based data from across the country)
🏥 Data type: EMR (diagnosis, procedures, lab results), DPC-based claims, prescriptions
🕒 Time coverage: Since 2008, continuously updated
👥 Population covered: Over 40 million patients from >450 hospitals
🔄 Longitudinal data: Patient-level follow-up within the same hospital network
📈 Pathologies: Broad disease coverage, with a strong representation of chronic diseases, oncology, and rare diseases

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✅ Strengths & Best Use Cases

🌍 Large-scale hospital dataset – Covers a significant portion of Japan’s acute care hospital network
🏥 Inpatient & outpatient insights – Captures hospital-based treatment pathways and interventions
📊 Rich clinical data – Includes laboratory values, imaging, and procedure details
🚀 Disease progression tracking – Supports studies on disease burden, treatment outcomes, and healthcare resource use
💡 Ideal for epidemiology & HEOR research – Enables cost-effectiveness analyses, patient journey studies, and burden-of-disease assessments

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⚠️ Limitations & Considerations

📉 Hospital-based data bias – Limited coverage of primary care and non-hospitalized populations
🏥 Restricted continuity of care – Patients may not be consistently tracked across different hospitals or care settings
🔄 DPC-specific limitations – Some data elements are specific to hospitals using the DPC system and may not be generalizable to all healthcare settings

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📚 How to Access & Learn More

🔗 Access: Requires institutional collaboration and approval from MDV
🎓 Publications: Link to relevant studies
📄 More info: MDV