[
  {
    "file_name": "admissions",
    "description": "Contains details for each hospital admission, including timing, demographics, admission source, and discharge info. Each admission has a unique hadm_id.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier; links to PATIENTS table. Patients may have multiple admissions."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique identifier for each hospital admission (1000000 - 1999999)."
      },
      {
        "column_name": "ADMITTIME",
        "description": "Date and time of hospital admission."
      },
      {
        "column_name": "DISCHTIME",
        "description": "Date and time of hospital discharge."
      },
      {
        "column_name": "ADMISSION_TYPE",
        "description": "Classifies admission urgency (e.g., elective, urgent, emergency)."
      },
      {
        "column_name": "ADMISSION_LOCATION",
        "description": "Location of patient before hospital admission."
      },
      {
        "column_name": "DISCHARGE_LOCATION",
        "description": "Patient's destination after hospital discharge."
      },
      {
        "column_name": "INSURANCE",
        "description": "Patient's insurance for this admission."
      },
      {
        "column_name": "LANGUAGE",
        "description": "Patient's language for this admission."
      },
      {
        "column_name": "MARITAL_STATUS",
        "description": "Patient's marital status for this admission."
      },
      {
        "column_name": "ETHNICITY",
        "description": "Patient's ethnicity for this admission."
      },
      {
        "column_name": "AGE",
        "description": "Patient's age for this admission.."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      }
    ]
  },
  {
    "file_name": "d_icd_diagnoses",
    "description": "Lists ICD-9 diagnosis codes used for patient billing.",
    "columns": [
      {
        "column_name": "ICD9_CODE",
        "description": "ICD diagnosis code."
      },
      {
        "column_name": "SHORT_TITLE",
        "description": "Short description of the ICD code."
      },
      {
        "column_name": "LONG_TITLE",
        "description": "Full description of the ICD code."
      }
    ],
    "link": [
      {
        "link_table": "diagnoses_icd",
        "link_column": "ICD9_CODE"
      }
    ]
  },
  {
    "file_name": "d_ccs_diagnoses",
    "description": "Lists ICD-9 diagnosis codes in CCS Level used for patient billing.",
    "columns": [
      {
        "column_name": "icd_code",
        "description": "ICD diagnosis code."
      },
      {
        "column_name": "icd_version",
        "description": "ICD version: 9 or 10. ICD-9 codes are numeric (sometimes with E or V), ICD-10 codes start with a letter."
      },
      {
        "column_name": "long_title",
        "description": "Full description of the ICD code in CCS Level."
      }
    ],
    "link": [
      {
        "link_table": "diagnoses_icd",
        "link_column": "ICD9_CODE"
      }
    ]
  },
  {
    "file_name": "d_icd_procedures",
    "description": "Defines ICD procedure codes used for billing and identifying performed procedures.",
    "columns": [
      {
        "column_name": "ICD9_CODE",
        "description": "ICD procedure code."
      },
      {
        "column_name": "SHORT_TITLE",
        "description": "Short description of the procedure code."
      },
      {
        "column_name": "LONG_TITLE",
        "description": "Brief definition of the procedure code."
      }
    ],
    "link": [
      {
        "link_table": "procedures_icd",
        "link_column": "ICD9_CODE"
      }
    ]
  },
  {
    "file_name": "d_ccs_procedures",
    "description": "Defines ICD procedure codes in CCS Level used for billing and identifying performed procedures.",
    "columns": [
      {
        "column_name": "icd_code",
        "description": "ICD procedure code."
      },
      {
        "column_name": "icd_version",
        "description": "ICD version: 9 (ICD-9) or 10 (ICD-10); decimals are optional."
      },
      {
        "column_name": "long_title",
        "description": "Brief definition of the procedure code in CCS Level."
      }
    ],
    "link": [
      {
        "link_table": "procedures_icd",
        "link_column": "ICD9_CODE"
      }
    ]
  },
  {
    "file_name": "d_labitems",
    "description": "Defines all lab measurement itemids used in MIMIC. Links lab events to item details, including fluid, category, and label. Most items map to LOINC codes for interoperability.",
    "columns": [
      {
        "column_name": "ITEMID",
        "description": "Unique ID for each lab concept; links to labevents."
      },
      {
        "column_name": "LABEL",
        "description": "Name of the lab concept for the itemid."
      }
    ],
    "link": [
      {
        "link_table": "labevents",
        "link_column": "ITEMID"
      }
    ]
  },
  {
    "file_name": "diagnoses_icd",
    "description": "Lists all ICD-9 diagnoses billed to patients during hospital stays, assigned at discharge based on clinical notes.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospitalization identifier."
      },
      {
        "column_name": "ICD9_CODE",
        "description": "ICD diagnosis code."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Time diagnosis was charted."
      }
    ],
    "link": [
      {
        "link_table": "d_icd_diagnoses",
        "link_column": "ICD9_CODE"
      }
    ]
  },
  {
    "file_name": "labevents",
    "description": "Stores all lab test results for a patient, including hematology, blood gases, chemistry, and rare tests.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospitalization identifier."
      },
      {
        "column_name": "ITEMID",
        "description": "Unique lab test concept identifier."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Time the lab test was charted or specimen collected."
      },
      {
        "column_name": "VALUENUM",
        "description": "Lab test result as a numeric value."
      },
      {
        "column_name": "VALUEUOM",
        "description": "Unit of measurement for the result."
      }
    ],
    "link": [
      {
        "link_table": "d_labitems",
        "link_column": "ITEMID"
      },
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      }
    ]
  },
  {
    "file_name": "microbiologyevents",
    "description": "Records microbiology tests, specimen details, organisms found for each patient sample.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospital admission ID."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Date and time the observation was charted."
      },
      {
        "column_name": "SPEC_TYPE_DESC",
        "description": "Description of the specimen type."
      },
      {
        "column_name": "ORG_NAME",
        "description": "Name of the organism grown, if any."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      }
    ]
  },
  {
    "file_name": "patients",
    "description": "Stores patient information that does not change over time.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier; primary key."
      },
      {
        "column_name": "GENDER",
        "description": "Patient's genotypical sex."
      },
      {
        "column_name": "DOB",
        "description": "De-identified date of birth."
      },
      {
        "column_name": "DOD",
        "description": "De-identified date of death from hospital and state records; deaths over one year post-discharge are censored."
      }
    ],
    "link": []
  },
  {
    "file_name": "prescriptions",
    "description": "Contains prescribed medications, including drug names, codes (GSN, NDC), strength, dose, and administration route.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospitalization identifier."
      },
      {
        "column_name": "STARTDATE",
        "description": "Medication start date."
      },
      {
        "column_name": "STOPDATE",
        "description": "Medication stop date."
      },
      {
        "column_name": "DRUG",
        "description": "Free-text medication name."
      },
      {
        "column_name": "DOSE_VAL_RX",
        "description": "Prescribed dose amount."
      },
      {
        "column_name": "DOSE_UNIT_RX",
        "description": "Dose unit of measurement."
      },
      {
        "column_name": "ROUTE",
        "description": "Medication administration route."
      }
    ],
    "link": []
  },
  {
    "file_name": "procedures_icd",
    "description": "Records all hospital-billed procedures for patients using ICD-9 codes.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospitalization identifier."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Date of the procedure."
      },
      {
        "column_name": "ICD9_CODE",
        "description": "ICD procedure code."
      }
    ],
    "link": [
      {
        "link_table": "d_icd_procedures",
        "link_column": "ICD9_CODE"
      }
    ]
  },
  {
    "file_name": "transfers",
    "description": "Tracks patient locations during hospital stays.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospital admission ID."
      },
      {
        "column_name": "EVENTTYPE",
        "description": "Type of transfer event: 'admit', 'transfer', or 'discharge'."
      },
      {
        "column_name": "CAREUNIT",
        "description": "Type of unit or ward where patient is located."
      },
      {
        "column_name": "INTIME",
        "description": "Date and time patient entered the care unit."
      },
      {
        "column_name": "OUTTIME",
        "description": "Date and time patient left the care unit."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      }
    ]
  },
  {
    "file_name": "d_items",
    "description": "Defines itemid concepts used in ICU event tables.",
    "columns": [
      {
        "column_name": "ITEMID",
        "description": "Unique identifier for each item."
      },
      {
        "column_name": "LABEL",
        "description": "Name of the concept for the itemid."
      },
      {
        "column_name": "LINKSTO",
        "description": "Name of the event table containing this itemid."
      }
    ],
    "link": [
      {
        "link_table": "chartevents",
        "link_column": "ITEMID"
      },
      {
        "link_table": "inputevents_cv",
        "link_column": "ITEMID"
      },
      {
        "link_table": "outputevents",
        "link_column": "ITEMID"
      }
    ]
  },
  {
    "file_name": "chartevents",
    "description": "chartevents stores all patient charted data during ICU stays, including vital signs, ventilator settings, lab values, and other clinical observations.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospital admission identifier."
      },
      {
        "column_name": "ICUSTAY_ID",
        "description": "Unique ICU stay identifier."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Time the observation was made."
      },
      {
        "column_name": "ITEMID",
        "description": "Identifier for the measurement type (e.g., heart rate)."
      },
      {
        "column_name": "VALUENUM",
        "description": "Numeric value for the itemid, if applicable."
      },
      {
        "column_name": "VALUEUOM",
        "description": "Unit of measurement for the value."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      },
      {
        "link_table": "icustays",
        "link_column": "ICUSTAY_ID"
      },
      {
        "link_table": "d_items",
        "link_column": "ITEMID"
      }
    ]
  },
  {
    "file_name": "icustays",
    "description": "Records ICU stays with admission and discharge times.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospital admission ID."
      },
      {
        "column_name": "ICUSTAY_ID",
        "description": "Unique ICU stay ID."
      },
      {
        "column_name": "FIRST_CAREUNIT",
        "description": "First ICU type during the stay, from TRANSFERS."
      },
      {
        "column_name": "LAST_CAREUNIT",
        "description": "Last ICU type during the stay, from TRANSFERS."
      },
      {
        "column_name": "INTIME",
        "description": "ICU admission date and time."
      },
      {
        "column_name": "OUTTIME",
        "description": "ICU discharge date and time."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      }
    ]
  },
  {
    "file_name": "inputevents_cv",
    "description": "Records continuous infusions and intermittent drug administrations, including timing, components, and changes in delivery.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospital admission ID."
      },
      {
        "column_name": "ICUSTAY_ID",
        "description": "Unique ICU stay ID."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Time of the input event."
      },
      {
        "column_name": "ITEMID",
        "description": "ID for the administered drug or substance."
      },
      {
        "column_name": "AMOUNT",
        "description": "Amount given to the patient."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      },
      {
        "link_table": "icustays",
        "link_column": "ICUSTAY_ID"
      },
      {
        "link_table": "d_items",
        "link_column": "ITEMID"
      }
    ]
  },
  {
    "file_name": "outputevents",
    "description": "Records patient outputs such as urine and drainage.",
    "columns": [
      {
        "column_name": "SUBJECT_ID",
        "description": "Unique patient identifier."
      },
      {
        "column_name": "HADM_ID",
        "description": "Unique hospital admission ID."
      },
      {
        "column_name": "ICUSTAY_ID",
        "description": "Unique ICU stay ID."
      },
      {
        "column_name": "CHARTTIME",
        "description": "Time of the output event."
      },
      {
        "column_name": "ITEMID",
        "description": "ID for the type of measurement."
      },
      {
        "column_name": "VALUE",
        "description": "Amount of substance at charttime."
      }
    ],
    "link": [
      {
        "link_table": "patients",
        "link_column": "SUBJECT_ID"
      },
      {
        "link_table": "admissions",
        "link_column": "HADM_ID"
      },
      {
        "link_table": "icustays",
        "link_column": "ICUSTAY_ID"
      },
      {
        "link_table": "d_items",
        "link_column": "ITEMID"
      }
    ]
  },
  {
    "file_name": "diagnoses_ccs_candidates",
    "description": "Lists ICD-9 codes in CCS Level used for patient billing.",
    "columns": [
      {
        "column_name": "icd_code",
        "description": "ICD diagnosis code."
      },
      {
        "column_name": "icd_version",
        "description": "ICD version: 9 or 10. ICD-9 codes are numeric (sometimes with E or V), ICD-10 codes start with a letter."
      },
      {
        "column_name": "candidate",
        "description": "Full description of the ICD code in CCS Level."
      }
    ],
    "link": []
  },
  {
    "file_name": "procedures_ccs_candidates",
    "description": "Defines ICD procedure codes in CCS Level used for billing and identifying performed procedures.",
    "columns": [
      {
        "column_name": "icd_code",
        "description": "ICD procedure code."
      },
      {
        "column_name": "icd_version",
        "description": "ICD version: 9 (ICD-9) or 10 (ICD-10); decimals are optional."
      },
      {
        "column_name": "long_title",
        "description": "Brief definition of the procedure code in CCS Level."
      }
    ],
    "link": []
  },
  {
    "file_name": "labevents_candidates",
    "description": "Defines all lab measurement itemids used in MIMIC. Links lab events to item details, including fluid, category, and label. Most items map to LOINC codes for interoperability.",
    "columns": [
      {
        "column_name": "ITEMID",
        "description": "Unique ID for each lab concept; links to labevents."
      },
      {
        "column_name": "LABEL",
        "description": "Name of the lab concept for the itemid."
      }
    ],
    "link": []
  },
  {
    "file_name": "prescriptions_candidates",
    "description": "Contains unique drug names prescribed to patients, used as candidate values for medication selection.",
    "columns": [
      {
        "column_name": "candidate",
        "description": "As candidate column for choosing the correct value. Drug name."
      }
    ],
    "link": []
  },
  {
    "file_name": "transfers_candidates",
    "description": "Contains unique careunit names from patient transfer events, used as candidate values for careunit selection.",
    "columns": [
      {
        "column_name": "candidate",
        "description": "As candidate column for choosing the correct value."
      }
    ],
    "link": []
  },
  {
    "file_name": "microbiologyevents_candidates",
    "description": "Contains unique microbiology test names, used as candidate values for microbiological event selection.",
    "columns": [
      {
        "column_name": "candidate",
        "description": "As candidate column for choosing the correct value."
      }
    ],
    "link": []
  }
]