{
  "patients": {
    "P001": {
      "patient_id": "P001",
      "name": "Jane Doe",
      "age": 52,
      "blood_type": "A+",
      "hba1c": 8.9,
      "gfr": 12.1,
      "creatinine": 4.7,
      "pra": 12,
      "t1_snapshot": {
        "hba1c": 7.2,
        "gfr": 18.5,
        "creatinine": 3.8,
        "blood_type": "A+",
        "pra": 12,
        "recorded_at": "2025-11-07"
      }
    },
    "P002": {
      "patient_id": "P002",
      "name": "John Smith",
      "age": 61,
      "blood_type": "O-",
      "hba1c": 10.2,
      "gfr": 8.3,
      "creatinine": 6.1,
      "pra": 45,
      "t1_snapshot": {
        "hba1c": 9.1,
        "gfr": 11.0,
        "creatinine": 5.2,
        "blood_type": "O-",
        "pra": 45,
        "recorded_at": "2025-11-07"
      }
    },
    "P003": {
      "patient_id": "P003",
      "name": "Maria Garcia",
      "age": 47,
      "blood_type": "B+",
      "hba1c": null,
      "gfr": 19.8,
      "creatinine": 3.4,
      "pra": 8,
      "t1_snapshot": {
        "hba1c": null,
        "gfr": 22.3,
        "creatinine": 3.1,
        "blood_type": "B+",
        "pra": 8,
        "recorded_at": "2025-11-07"
      }
    }
  }
}