{
  "data": {
    "__count": 1,
    "__licence": {
      "identifier": "CC-BY-4.0",
      "link": "https://creativecommons.org/licenses/by/4.0",
      "name": "Creative Commons Attribution 4.0 International"
    },
    "results": {
      "Date": "2026-06-23 07:57:58",
      "DisorderGroup": "Disorder",
      "ORPHAcode": 3303,
      "OrphanetURL": "http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=en&Expert=3303",
      "Preferred term": "Tetralogy of Fallot",
      "Prevalence": [
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Worldwide",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "22078432[PMID]",
          "ValMoy": "34.0"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Europe",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "[EXPERT]_EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "29.3"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Austria",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2009[OTHER]",
          "ValMoy": "39.3"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Belgium",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "40.8"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Croatia",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "11.4"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Denmark",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "39.7"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "France",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "13.8"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Germany",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "11.9"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Hungary",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "34.3"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Ireland",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "14.5"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Italy",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "26.8"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Malta",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2009[OTHER]",
          "ValMoy": "48.2"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Netherlands",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "29.2"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Norway",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "31.1"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Poland",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "16.2"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Portugal",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "23.7"
        },
        {
          "PrevalenceClass": "6-9 / 10 000",
          "PrevalenceGeographic": "Taiwan, Province of China",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "20138303[PMID]",
          "ValMoy": "63.0"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Spain",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2010[OTHER]",
          "ValMoy": "11.9"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Switzerland",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "25.1"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "United Kingdom",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "32.0"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "Ukraine",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "EUROCAT European surveillance of congenital anomalies 2011[OTHER]",
          "ValMoy": "25.4"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "United States",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "18657826[PMID]",
          "ValMoy": "47.0"
        },
        {
          "PrevalenceClass": "1-5 / 10 000",
          "PrevalenceGeographic": "China",
          "PrevalenceQualification": "Value and class",
          "PrevalenceType": "Prevalence at birth",
          "PrevalenceValidationStatus": "Validated",
          "Source": "23350618[PMID]",
          "ValMoy": "40.0"
        },
        {
          "PrevalenceClass": "Unknown",
          "PrevalenceGeographic": "Worldwide",
          "PrevalenceQualification": "Class only",
          "PrevalenceType": "Point prevalence",
          "PrevalenceValidationStatus": "Validated",
          "Source": "ORPHANET",
          "ValMoy": "0.0"
        },
        {
          "PrevalenceClass": "Unknown",
          "PrevalenceGeographic": "Europe",
          "PrevalenceQualification": "Class only",
          "PrevalenceType": "Point prevalence",
          "PrevalenceValidationStatus": "Validated",
          "Source": "ORPHANET",
          "ValMoy": "0.0"
        }
      ],
      "Typology": "Malformation syndrome"
    }
  },
  "datasetCategory": {
    "lang": "en",
    "name": "Epidemiology of rare diseases"
  },
  "parameters": {
    "path": {
      "ORPHAcode": 3303
    },
    "query": {}
  },
  "uri": "https://api.orphadata.com/rd-epidemiology/orphacodes/3303"
}