Share of the population with neurodevelopmental disorders by type, 2021
The estimated share of the population with a given condition, based on statistical modeling from surveys and medical records.
Country/area | Down syndrome cases per 100 people • 2021 | Attention-deficit/hyperactivity disorder (ADHD) cases per 100 people • 2021 | Autism spectrum disorders cases per 100 people • 2021 | Developmental intellectual disability cases per 100 people • 2021 |
|---|---|---|---|---|
| Afghanistan | 0.0% | 1.2% | 0.8% | 3.1% |
| Albania | 0.0% | 0.8% | 0.9% | 0.4% |
| Algeria | 0.0% | 1.0% | 0.8% | 1.3% |
| American Samoa | 0.0% | 1.2% | 0.7% | 0.3% |
| Andorra | 0.0% | 0.9% | 0.9% | 0.2% |
| Angola | 0.0% | 0.6% | 0.9% | 0.3% |
| Antigua and Barbuda | 0.0% | 2.8% | 0.7% | 0.2% |
| Argentina | 0.0% | 1.2% | 1.0% | 0.4% |
| Armenia | 0.0% | 0.8% | 0.9% | 0.4% |
| Australia | 0.0% | 2.7% | 1.2% | 0.2% |
| Austria | 0.1% | 1.1% | 0.8% | 0.2% |
| Azerbaijan | 0.0% | 1.0% | 0.9% | 0.4% |
| Bahamas | 0.0% | 3.0% | 0.7% | 0.2% |
| Bahrain | 0.0% | 1.1% | 0.9% | 0.7% |
| Bangladesh | 0.0% | 0.7% | 0.6% | 0.3% |
| Barbados | 0.0% | 2.5% | 0.7% | 0.2% |
| Belarus | 0.0% | 0.8% | 0.9% | 0.3% |
| Belgium | 0.0% | 0.9% | 0.8% | 0.2% |
| Belize | 0.0% | 3.4% | 0.7% | 0.4% |
| Benin | 0.0% | 0.6% | 0.9% | 0.5% |
| Bermuda | 0.0% | 2.1% | 0.7% | 0.1% |
| Bhutan | 0.0% | 0.6% | 0.7% | 1.3% |
| Bolivia | 0.0% | 2.3% | 0.7% | 0.5% |
| Bosnia and Herzegovina | 0.0% | 0.7% | 0.9% | 0.4% |
| Botswana | 0.0% | 0.5% | 0.9% | 0.2% |
| Brazil | 0.0% | 1.9% | 0.6% | 0.3% |
| Brunei | 0.1% | 1.2% | 1.4% | 0.0% |
| Bulgaria | 0.0% | 0.7% | 0.9% | 0.3% |
| Burkina Faso | 0.0% | 0.6% | 0.9% | 0.7% |
| Burundi | 0.0% | 0.6% | 0.9% | 1.1% |
| Cambodia | 0.0% | 0.9% | 0.7% | 1.0% |
| Cameroon | 0.0% | 0.6% | 0.9% | 0.4% |
| Canada | 0.0% | 1.3% | 1.1% | 0.4% |
| Cape Verde | 0.0% | 0.5% | 1.0% | 0.2% |
| Central African Republic | 0.0% | 0.6% | 0.9% | 1.0% |
| Chad | 0.0% | 0.6% | 0.9% | 0.6% |
| Chile | 0.0% | 1.1% | 1.1% | 0.3% |
| China | 0.0% | 1.7% | 0.6% | 0.3% |
| Colombia | 0.0% | 1.5% | 0.8% | 0.2% |
| Comoros | 0.0% | 0.5% | 0.9% | 0.4% |
| Congo | 0.0% | 0.6% | 0.9% | 0.3% |
| Cook Islands | 0.0% | 1.0% | 0.7% | 0.2% |
| Costa Rica | 0.0% | 1.5% | 0.8% | 0.2% |
| Cote d'Ivoire | 0.0% | 0.6% | 1.0% | 0.4% |
| Croatia | 0.0% | 0.7% | 0.9% | 0.2% |
| Cuba | 0.0% | 2.4% | 0.7% | 0.3% |
| Cyprus | 0.0% | 1.0% | 0.9% | 0.3% |
| Czechia | 0.0% | 0.7% | 0.9% | 0.2% |
| Democratic Republic of Congo | 0.0% | 0.6% | 0.9% | 1.0% |
| Denmark | 0.0% | 0.9% | 0.9% | 0.0% |
| Djibouti | 0.0% | 0.6% | 1.0% | 0.4% |
| Dominica | 0.0% | 3.0% | 0.7% | 0.3% |
| Dominican Republic | 0.0% | 3.1% | 0.7% | 0.3% |
| East Timor | 0.0% | 1.0% | 0.7% | 0.8% |
| Ecuador | 0.0% | 2.2% | 0.7% | 0.3% |
| Egypt | 0.0% | 1.1% | 0.8% | 1.8% |
| El Salvador | 0.0% | 1.6% | 0.7% | 0.4% |
| Equatorial Guinea | 0.0% | 0.7% | 1.0% | 0.1% |
| Eritrea | 0.0% | 0.6% | 0.9% | 0.6% |
| Estonia | 0.0% | 0.7% | 0.9% | 0.2% |
| Eswatini | 0.0% | 0.6% | 0.9% | 0.3% |
| Ethiopia | 0.0% | 0.6% | 0.9% | 0.6% |
| Fiji | 0.0% | 1.1% | 0.7% | 0.4% |
| Finland | 0.0% | 1.2% | 0.8% | 0.3% |
| France | 0.0% | 1.0% | 0.8% | 0.3% |
| Gabon | 0.0% | 0.6% | 0.9% | 0.2% |
| Gambia | 0.0% | 0.6% | 0.9% | 0.5% |
| Georgia | 0.0% | 0.8% | 0.9% | 0.5% |
| Germany | 0.0% | 0.4% | 0.8% | 0.2% |
| Ghana | 0.0% | 0.6% | 0.9% | 0.3% |
| Greece | 0.1% | 0.8% | 0.8% | 0.3% |
| Greenland | 0.0% | 1.6% | 1.0% | 0.3% |
| Grenada | 0.0% | 3.0% | 0.7% | 0.3% |
| Guam | 0.0% | 1.0% | 0.7% | 0.2% |
| Guatemala | 0.0% | 1.8% | 0.7% | 0.4% |
| Guinea | 0.0% | 0.6% | 0.9% | 0.5% |
| Guinea-Bissau | 0.0% | 0.6% | 0.9% | 0.6% |
| Guyana | 0.0% | 3.2% | 0.7% | 0.4% |
| Haiti | 0.0% | 3.4% | 0.7% | 0.7% |
| Honduras | 0.0% | 1.8% | 0.7% | 0.5% |
| Hungary | 0.0% | 0.7% | 0.9% | 0.2% |
| Iceland | 0.1% | 1.2% | 1.0% | 0.2% |
| India | 0.0% | 0.5% | 0.7% | 3.6% |
| Indonesia | 0.0% | 0.9% | 0.7% | 0.7% |
| Iran | 0.0% | 2.6% | 0.8% | 1.2% |
| Iraq | 0.0% | 1.3% | 0.7% | 1.0% |
| Ireland | 0.1% | 1.5% | 1.0% | 0.2% |
| Israel | 0.1% | 1.4% | 0.8% | 0.3% |
| Italy | 0.0% | 0.7% | 0.9% | 0.2% |
| Jamaica | 0.0% | 3.0% | 0.7% | 0.3% |
| Japan | 0.0% | 0.8% | 1.4% | 0.1% |
| Jordan | 0.0% | 1.1% | 0.8% | 1.3% |
| Kazakhstan | 0.0% | 1.0% | 0.9% | 0.3% |
| Kenya | 0.0% | 0.6% | 0.9% | 0.5% |
| Kiribati | 0.0% | 1.2% | 0.7% | 0.9% |
| Kuwait | 0.0% | 1.0% | 0.8% | 0.5% |
| Kyrgyzstan | 0.0% | 1.1% | 0.9% | 0.9% |
| Laos | 0.0% | 0.9% | 0.7% | 0.8% |
| Latvia | 0.0% | 0.7% | 0.9% | 0.2% |
| Lebanon | 0.0% | 1.0% | 0.9% | 1.1% |
| Lesotho | 0.0% | 0.6% | 0.9% | 0.4% |
| Liberia | 0.0% | 0.6% | 0.9% | 0.8% |
| Libya | 0.0% | 1.0% | 0.8% | 1.3% |
| Lithuania | 0.0% | 0.7% | 0.9% | 0.2% |
| Luxembourg | 0.0% | 1.0% | 0.9% | 0.2% |
| Madagascar | 0.0% | 0.6% | 0.9% | 0.7% |
| Malawi | 0.0% | 0.6% | 0.9% | 0.8% |
| Malaysia | 0.0% | 0.4% | 0.7% | 0.3% |
| Maldives | 0.0% | 0.9% | 0.8% | 0.4% |
| Mali | 0.0% | 0.6% | 0.9% | 0.5% |
| Malta | 0.1% | 0.9% | 0.8% | 0.3% |
| Marshall Islands | 0.0% | 1.2% | 0.7% | 0.7% |
| Mauritania | 0.0% | 0.6% | 1.0% | 0.4% |
| Mauritius | 0.0% | 0.7% | 0.7% | 0.3% |
| Mexico | 0.0% | 1.1% | 0.8% | 0.2% |
| Micronesia (country) | 0.0% | 1.2% | 0.7% | 0.7% |
| Moldova | 0.0% | 0.8% | 0.9% | 0.6% |
| Monaco | 0.0% | 0.8% | 0.8% | 0.1% |
| Mongolia | 0.0% | 1.0% | 0.9% | 0.5% |
| Montenegro | 0.0% | 0.8% | 0.9% | 0.3% |
| Morocco | 0.0% | 1.0% | 0.8% | 1.5% |
| Mozambique | 0.0% | 0.6% | 0.9% | 0.7% |
| Myanmar | 0.0% | 0.9% | 0.7% | 0.8% |
| Namibia | 0.0% | 0.6% | 0.9% | 0.2% |
| Nauru | 0.0% | 1.3% | 0.7% | 0.4% |
| Nepal | 0.0% | 0.6% | 0.6% | 2.1% |
| Netherlands | 0.1% | 1.1% | 0.9% | 0.2% |
| New Zealand | 0.0% | 2.0% | 1.1% | 0.2% |
| Nicaragua | 0.0% | 1.7% | 0.8% | 0.4% |
| Niger | 0.0% | 0.6% | 0.9% | 0.8% |
| Nigeria | 0.0% | 0.7% | 0.9% | 0.3% |
| Niue | 0.0% | 1.0% | 0.7% | 0.3% |
| North Korea | 0.0% | 1.2% | 0.7% | 0.8% |
| North Macedonia | 0.0% | 0.8% | 0.9% | 0.4% |
| Northern Mariana Islands | 0.0% | 1.0% | 0.7% | 0.2% |
| Norway | 0.0% | 0.7% | 0.8% | 0.2% |
| Oman | 0.0% | 1.1% | 0.9% | 0.7% |
| Pakistan | 0.0% | 0.7% | 0.7% | 2.6% |
| Palau | 0.0% | 0.9% | 0.7% | 0.3% |
| Palestine | 0.0% | 1.2% | 0.8% | 2.1% |
| Panama | 0.0% | 1.6% | 0.8% | 0.2% |
| Papua New Guinea | 0.0% | 1.2% | 0.7% | 0.7% |
| Paraguay | 0.0% | 2.2% | 0.6% | 0.3% |
| Peru | 0.0% | 2.2% | 0.7% | 0.3% |
| Philippines | 0.0% | 0.9% | 0.7% | 0.7% |
| Poland | 0.0% | 0.8% | 0.9% | 0.3% |
| Portugal | 0.0% | 0.8% | 0.8% | 0.3% |
| Puerto Rico | 0.0% | 2.3% | 0.7% | 0.1% |
| Qatar | 0.0% | 1.1% | 1.0% | 0.4% |
| Romania | 0.0% | 0.7% | 0.9% | 0.3% |
| Russia | 0.0% | 0.8% | 0.9% | 0.3% |
| Rwanda | 0.0% | 0.6% | 0.9% | 0.6% |
| Saint Kitts and Nevis | 0.0% | 2.7% | 0.7% | 0.2% |
| Saint Lucia | 0.0% | 2.7% | 0.7% | 0.3% |
| Saint Vincent and the Grenadines | 0.0% | 2.9% | 0.7% | 0.3% |
| Samoa | 0.0% | 1.2% | 0.7% | 0.6% |
| San Marino | 0.0% | 0.9% | 0.8% | 0.2% |
| Sao Tome and Principe | 0.0% | 0.6% | 1.0% | 0.4% |
| Saudi Arabia | 0.0% | 1.0% | 0.8% | 0.4% |
| Senegal | 0.0% | 0.6% | 0.9% | 0.4% |
| Serbia | 0.0% | 0.8% | 0.9% | 0.3% |
| Seychelles | 0.0% | 0.8% | 0.7% | 0.3% |
| Sierra Leone | 0.0% | 0.6% | 0.9% | 0.7% |
| Singapore | 0.0% | 0.9% | 1.5% | 0.0% |
| Slovakia | 0.0% | 0.8% | 0.9% | 0.2% |
| Slovenia | 0.0% | 0.7% | 1.0% | 0.2% |
| Solomon Islands | 0.0% | 1.3% | 0.7% | 1.0% |
| Somalia | 0.0% | 0.6% | 0.9% | 2.2% |
| South Africa | 0.0% | 0.5% | 0.9% | 0.2% |
| South Korea | 0.0% | 0.8% | 1.4% | 0.0% |
| South Sudan | 0.0% | 0.6% | 0.9% | 0.5% |
| Spain | 0.0% | 2.0% | 1.0% | 0.9% |
| Sri Lanka | 0.0% | 0.8% | 0.7% | 0.4% |
| Sudan | 0.0% | 1.2% | 0.8% | 2.4% |
| Suriname | 0.0% | 3.0% | 0.7% | 0.3% |
| Sweden | 0.0% | 0.9% | 1.0% | 0.3% |
| Switzerland | 0.0% | 1.1% | 0.9% | 0.2% |
| Syria | 0.0% | 1.0% | 0.8% | 1.8% |
| Taiwan | 0.0% | 0.7% | 0.9% | 0.1% |
| Tajikistan | 0.0% | 1.1% | 0.9% | 0.9% |
| Tanzania | 0.0% | 0.6% | 0.9% | 0.5% |
| Thailand | 0.0% | 1.4% | 0.7% | 0.6% |
| Togo | 0.0% | 0.6% | 0.9% | 0.6% |
| Tokelau | 0.0% | 1.2% | 0.7% | 0.5% |
| Tonga | 0.0% | 1.2% | 0.7% | 0.6% |
| Trinidad and Tobago | 0.0% | 2.7% | 0.7% | 0.2% |
| Tunisia | 0.0% | 0.9% | 0.8% | 1.3% |
| Turkey | 0.0% | 1.3% | 0.8% | 0.8% |
| Turkmenistan | 0.0% | 1.1% | 0.9% | 0.4% |
| Tuvalu | 0.0% | 1.2% | 0.7% | 0.8% |
| Uganda | 0.0% | 0.6% | 1.0% | 0.6% |
| Ukraine | 0.0% | 0.8% | 0.9% | 0.5% |
| United Arab Emirates | 0.0% | 0.4% | 0.9% | 0.5% |
| United Kingdom | 0.0% | 1.0% | 0.7% | 0.3% |
| United States | 0.0% | 1.6% | 1.0% | 0.3% |
| United States Virgin Islands | 0.0% | 2.2% | 0.7% | 0.1% |
| Uruguay | 0.0% | 1.1% | 1.0% | 0.3% |
| Uzbekistan | 0.0% | 1.0% | 0.9% | 0.6% |
| Vanuatu | 0.0% | 1.2% | 0.7% | 0.9% |
| Venezuela | 0.0% | 2.4% | 0.8% | 0.3% |
| Vietnam | 0.0% | 0.8% | 0.7% | 0.5% |
| Yemen | 0.0% | 0.9% | 0.8% | 2.6% |
| Zambia | 0.0% | 0.6% | 0.9% | 0.4% |
| Zimbabwe | 0.0% | 0.6% | 0.9% | 0.5% |
| Other | ||||
| Africa | 0.0% | 0.7% | 0.9% | 0.8% |
| African Region (WHO) | 0.0% | 0.6% | 0.9% | 0.6% |
| Americas (WHO) | 0.0% | 1.7% | 0.8% | 0.3% |
| Asia | 0.0% | 1.1% | 0.7% | 1.5% |
| East Asia & Pacific (WB) | 0.0% | 1.4% | 0.7% | 0.4% |
| Eastern Mediterranean (WHO) | 0.0% | 1.1% | 0.7% | 1.9% |
| Europe | 0.0% | 0.9% | 0.9% | 0.3% |
| Europe & Central Asia (WB) | 0.0% | 0.9% | 0.9% | 0.4% |
| European Region (WHO) | 0.0% | 0.9% | 0.9% | 0.4% |
| High-income countries | 0.0% | 1.1% | 1.0% | 0.3% |
| Latin America & Caribbean (WB) | 0.0% | 1.8% | 0.7% | 0.3% |
| Low-income countries | 0.0% | 0.7% | 0.9% | 1.1% |
| Lower-middle-income countries | 0.0% | 0.8% | 0.7% | 2.0% |
| Middle East & North Africa (WB) | 0.0% | 1.3% | 0.8% | 1.4% |
| North America | 0.0% | 1.6% | 0.9% | 0.3% |
| North America (WB) | 0.0% | 1.6% | 1.1% | 0.3% |
| Oceania | 0.0% | 2.2% | 1.0% | 0.4% |
| South America | 0.0% | 1.9% | 0.7% | 0.3% |
| South Asia (WB) | 0.0% | 0.6% | 0.7% | 3.1% |
| South-East Asia (WHO) | 0.0% | 0.7% | 0.7% | 2.7% |
| Sub-Saharan Africa (WB) | 0.0% | 0.6% | 0.9% | 0.6% |
| Upper-middle-income countries | 0.0% | 1.6% | 0.7% | 0.3% |
| Western Pacific (WHO) | 0.0% | 1.5% | 0.7% | 0.3% |
| World | 0.0% | 1.1% | 0.8% | 1.1% |
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