Uniform Data Set version 4
UDSv4 - Template
United States
Reference ID
USDv4
Producer(s)
National Alzheimer’s Coordinating Center (NACC) and the NIA-funded ADRC network
Collections
Created on
Jul 02, 2026
Last modified
Jul 07, 2026
Page views
13742
2. In which country or region did you spend most of your childhood? (chldhdctry)
Data file: UDSv4TemplateForXMLD_2026-04-14_0731.REDCap.xml
Overview
Valid:
58
Range:
-
Format:
Questions and instructions
Question pretext
[packet]='I' OR [packet]='I4'
Categories
| Value | Category | Cases | |
|---|---|---|---|
| AFG | AFG - Afghanistan | 0 |
0%
|
| XQZ | XQZ - Akrotiri | 0 |
0%
|
| ALB | ALB - Albania | 0 |
0%
|
| DZA | DZA - Algeria | 0 |
0%
|
| ASM | ASM - American Samoa | 0 |
0%
|
| AND | AND - Andorra | 0 |
0%
|
| AGO | AGO - Angola | 0 |
0%
|
| AIA | AIA - Anguilla | 0 |
0%
|
| ATA | ATA - Antarctica | 0 |
0%
|
| ATG | ATG - Antigua and Barbuda | 0 |
0%
|
| ARG | ARG - Argentina | 0 |
0%
|
| ARM | ARM - Armenia | 0 |
0%
|
| ABW | ABW - Aruba | 0 |
0%
|
| XAC | XAC - Ashmore and Cartier Islands | 0 |
0%
|
| AUS | AUS - Australia | 0 |
0%
|
| AUT | AUT - Austria | 0 |
0%
|
| AZE | AZE - Azerbaijan | 0 |
0%
|
| BHS | BHS - The Bahamas | 0 |
0%
|
| BHR | BHR - Bahrain | 0 |
0%
|
| XBK | XBK - Baker Island | 0 |
0%
|
| BGD | BGD - Bangladesh | 0 |
0%
|
| BRB | BRB - Barbados | 0 |
0%
|
| XBI | XBI - Bassas da India | 0 |
0%
|
| BLR | BLR - Belarus | 0 |
0%
|
| BEL | BEL - Belgium | 0 |
0%
|
| BLZ | BLZ - Belize | 0 |
0%
|
| BEN | BEN - Benin | 0 |
0%
|
| BMU | BMU - Bermuda | 0 |
0%
|
| BTN | BTN - Bhutan | 0 |
0%
|
| BOL | BOL - Bolivia | 0 |
0%
|
| BES | BES - Bonaire, Sint Eustatius, and Saba | 0 |
0%
|
| BIH | BIH - Bosnia and Herzegovina | 0 |
0%
|
| BWA | BWA - Botswana | 0 |
0%
|
| BVT | BVT - Bouvet Island | 0 |
0%
|
| BRA | BRA - Brazil | 0 |
0%
|
| IOT | IOT - British Indian Ocean Territory | 0 |
0%
|
| BRN | BRN - Brunei | 0 |
0%
|
| BGR | BGR - Bulgaria | 0 |
0%
|
| BFA | BFA - Burkina Faso | 0 |
0%
|
| MMR | MMR - Burma | 0 |
0%
|
| BDI | BDI - Burundi | 0 |
0%
|
| KHM | KHM - Cambodia | 0 |
0%
|
| CMR | CMR - Cameroon | 0 |
0%
|
| CAN | CAN - Canada | 0 |
0%
|
| CPV | CPV - Cabo Verde | 0 |
0%
|
| CYM | CYM - Cayman Islands | 0 |
0%
|
| CAF | CAF - Central African Republic | 0 |
0%
|
| TCD | TCD - Chad | 0 |
0%
|
| CHL | CHL - Chile | 0 |
0%
|
| CHN | CHN - China | 0 |
0%
|
| CXR | CXR - Christmas Island | 0 |
0%
|
| CPT | CPT - Clipperton Island | 0 |
0%
|
| CCK | CCK - Cocos (Keeling) Islands | 0 |
0%
|
| COL | COL - Colombia | 0 |
0%
|
| COM | COM - Comoros | 0 |
0%
|
| COG | COG - Congo (Brazzaville) | 0 |
0%
|
| COD | COD - Congo (Kinshasa) | 0 |
0%
|
| COK | COK - Cook Islands | 0 |
0%
|
| XCS | XCS - Coral Sea Islands | 0 |
0%
|
| CRI | CRI - Costa Rica | 0 |
0%
|
| CIV | CIV - Côte dIvoire | 0 |
0%
|
| HRV | HRV - Croatia | 0 |
0%
|
| CUB | CUB - Cuba | 0 |
0%
|
| CUW | CUW - Curaçao | 0 |
0%
|
| CYP | CYP - Cyprus | 0 |
0%
|
| CZE | CZE - Czech Republic | 0 |
0%
|
| DNK | DNK - Denmark | 0 |
0%
|
| XXD | XXD - Dhekelia | 0 |
0%
|
| DGA | DGA - Diego Garcia | 0 |
0%
|
| DJI | DJI - Djibouti | 0 |
0%
|
| DMA | DMA - Dominica | 1 |
1.7%
|
| DOM | DOM - Dominican Republic | 0 |
0%
|
| ECU | ECU - Ecuador | 0 |
0%
|
| EGY | EGY - Egypt | 0 |
0%
|
| SLV | SLV - El Salvador | 0 |
0%
|
| GNQ | GNQ - Equatorial Guinea | 0 |
0%
|
| ERI | ERI - Eritrea | 0 |
0%
|
| EST | EST - Estonia | 0 |
0%
|
| ETH | ETH - Ethiopia | 0 |
0%
|
| XEU | XEU - Europa Island | 0 |
0%
|
| FLK | FLK - Falkland Islands (Islas Malvinas) | 0 |
0%
|
| FRO | FRO - Faroe Islands | 0 |
0%
|
| FJI | FJI - Fiji | 0 |
0%
|
| FIN | FIN - Finland | 0 |
0%
|
| FRA | FRA - France | 0 |
0%
|
| GUF | GUF - French Guiana | 0 |
0%
|
| PYF | PYF - French Polynesia | 0 |
0%
|
| ATF | ATF - French Southern and Antarctic Lands | 0 |
0%
|
| GAB | GAB - Gabon | 0 |
0%
|
| GMB | GMB - The Gambia | 0 |
0%
|
| XGZ | XGZ - Gaza Strip | 0 |
0%
|
| GEO | GEO - Georgia | 0 |
0%
|
| DEU | DEU - Germany | 0 |
0%
|
| GHA | GHA - Ghana | 0 |
0%
|
| GIB | GIB - Gibraltar | 0 |
0%
|
| XGL | XGL - Glorioso Islands | 0 |
0%
|
| GRC | GRC - Greece | 0 |
0%
|
| GRL | GRL - Greenland | 0 |
0%
|
| GRD | GRD - Grenada | 0 |
0%
|
| GLP | GLP - Guadeloupe | 0 |
0%
|
| GUM | GUM - Guam | 0 |
0%
|
| AX2 | AX2 - Guantanamo Bay Naval Base | 0 |
0%
|
| GTM | GTM - Guatemala | 0 |
0%
|
| GGY | GGY - Guernsey | 0 |
0%
|
| GIN | GIN - Guinea | 0 |
0%
|
| GNB | GNB - Guinea-Bissau | 0 |
0%
|
| GUY | GUY - Guyana | 0 |
0%
|
| HTI | HTI - Haiti | 0 |
0%
|
| HMD | HMD - Heard Island and McDonald Islands | 0 |
0%
|
| HND | HND - Honduras | 0 |
0%
|
| HKG | HKG - Hong Kong | 0 |
0%
|
| XHO | XHO - Howland Island | 0 |
0%
|
| HUN | HUN - Hungary | 0 |
0%
|
| ISL | ISL - Iceland | 0 |
0%
|
| IND | IND - India | 0 |
0%
|
| IDN | IDN - Indonesia | 0 |
0%
|
| IRN | IRN - Iran | 0 |
0%
|
| IRQ | IRQ - Iraq | 0 |
0%
|
| IRL | IRL - Ireland | 0 |
0%
|
| IMN | IMN - Isle of Man | 0 |
0%
|
| ISR | ISR - Israel | 0 |
0%
|
| ITA | ITA - Italy | 0 |
0%
|
| JAM | JAM - Jamaica | 0 |
0%
|
| XJM | XJM - Jan Mayen | 0 |
0%
|
| JPN | JPN - Japan | 0 |
0%
|
| XJV | XJV - Jarvis Island | 0 |
0%
|
| JEY | JEY - Jersey | 0 |
0%
|
| XJA | XJA - Johnston Atoll | 0 |
0%
|
| JOR | JOR - Jordan | 0 |
0%
|
| XJN | XJN - Juan de Nova Island | 0 |
0%
|
| KAZ | KAZ - Kazakhstan | 0 |
0%
|
| KEN | KEN - Kenya | 0 |
0%
|
| XKR | XKR - Kingman Reef | 0 |
0%
|
| KIR | KIR - Kiribati | 0 |
0%
|
| PRK | PRK - North Korea | 9 |
15.5%
|
| KOR | KOR - South Korea | 0 |
0%
|
| XKS | XKS - Kosovo | 0 |
0%
|
| KWT | KWT - Kuwait | 0 |
0%
|
| KGZ | KGZ - Kyrgyzstan | 0 |
0%
|
| LAO | LAO - Laos | 0 |
0%
|
| LVA | LVA - Latvia | 0 |
0%
|
| LBN | LBN - Lebanon | 0 |
0%
|
| LSO | LSO - Lesotho | 0 |
0%
|
| LBR | LBR - Liberia | 0 |
0%
|
| LBY | LBY - Libya | 0 |
0%
|
| LIE | LIE - Liechtenstein | 0 |
0%
|
| LTU | LTU - Lithuania | 0 |
0%
|
| LUX | LUX - Luxembourg | 0 |
0%
|
| MAC | MAC - Macau | 0 |
0%
|
| MKD | MKD - North Macedonia | 0 |
0%
|
| MDG | MDG - Madagascar | 0 |
0%
|
| MWI | MWI - Malawi | 0 |
0%
|
| MYS | MYS - Malaysia | 0 |
0%
|
| MDV | MDV - Maldives | 0 |
0%
|
| MLI | MLI - Mali | 0 |
0%
|
| MLT | MLT - Malta | 0 |
0%
|
| MHL | MHL - Marshall Islands | 0 |
0%
|
| MTQ | MTQ - Martinique | 0 |
0%
|
| MRT | MRT - Mauritania | 0 |
0%
|
| MUS | MUS - Mauritius | 0 |
0%
|
| MYT | MYT - Mayotte | 0 |
0%
|
| MEX | MEX - Mexico | 0 |
0%
|
| FSM | FSM - Federated States of Micronesia | 0 |
0%
|
| XMW | XMW - Midway Islands | 0 |
0%
|
| MDA | MDA - Moldova | 0 |
0%
|
| MCO | MCO - Monaco | 0 |
0%
|
| MNG | MNG - Mongolia | 0 |
0%
|
| MNE | MNE - Montenegro | 0 |
0%
|
| MSR | MSR - Montserrat | 0 |
0%
|
| MAR | MAR - Morocco | 0 |
0%
|
| MOZ | MOZ - Mozambique | 0 |
0%
|
| NAM | NAM - Namibia | 0 |
0%
|
| NRU | NRU - Nauru | 0 |
0%
|
| XNV | XNV - Navassa Island | 0 |
0%
|
| NPL | NPL - Nepal | 0 |
0%
|
| NLD | NLD - Netherlands | 0 |
0%
|
| NCL | NCL - New Caledonia | 0 |
0%
|
| NZL | NZL - New Zealand | 0 |
0%
|
| NIC | NIC - Nicaragua | 0 |
0%
|
| NER | NER - Niger | 0 |
0%
|
| NGA | NGA - Nigeria | 0 |
0%
|
| NIU | NIU - Niue | 0 |
0%
|
| NFK | NFK - Norfolk Island | 0 |
0%
|
| MNP | MNP - Northern Mariana Islands | 0 |
0%
|
| NOR | NOR - Norway | 0 |
0%
|
| OMN | OMN - Oman | 6 |
10.3%
|
| PAK | PAK - Pakistan | 0 |
0%
|
| PLW | PLW - Palau | 0 |
0%
|
| XPL | XPL - Palmyra Atoll | 0 |
0%
|
| PAN | PAN - Panama | 0 |
0%
|
| PNG | PNG - Papua New Guinea | 0 |
0%
|
| XPR | XPR - Paracel Islands | 0 |
0%
|
| PRY | PRY - Paraguay | 0 |
0%
|
| PER | PER - Peru | 0 |
0%
|
| PHL | PHL - Philippines | 0 |
0%
|
| PCN | PCN - Pitcairn Islands | 0 |
0%
|
| POL | POL - Poland | 0 |
0%
|
| PRT | PRT - Portugal | 0 |
0%
|
| PRI | PRI - Puerto Rico | 0 |
0%
|
| QAT | QAT - Qatar | 0 |
0%
|
| REU | REU - Reunion | 0 |
0%
|
| ROU | ROU - Romania | 0 |
0%
|
| RUS | RUS - Russia | 0 |
0%
|
| RWA | RWA - Rwanda | 0 |
0%
|
| BLM | BLM - Saint Barthelemy | 2 |
3.4%
|
| SHN | SHN - Saint Helena, Ascension, and Tristan da Cunha | 0 |
0%
|
| KNA | KNA - Saint Kitts and Nevis | 0 |
0%
|
| LCA | LCA - Saint Lucia | 0 |
0%
|
| MAF | MAF - Saint Martin | 0 |
0%
|
| SPM | SPM - Saint Pierre and Miquelon | 0 |
0%
|
| VCT | VCT - Saint Vincent and the Grenadines | 0 |
0%
|
| WSM | WSM - Samoa | 0 |
0%
|
| SMR | SMR - San Marino | 0 |
0%
|
| STP | STP - Sao Tome and Principe | 0 |
0%
|
| SAU | SAU - Saudi Arabia | 0 |
0%
|
| SEN | SEN - Senegal | 0 |
0%
|
| SRB | SRB - Serbia | 0 |
0%
|
| SYC | SYC - Seychelles | 0 |
0%
|
| SLE | SLE - Sierra Leone | 0 |
0%
|
| SGP | SGP - Singapore | 40 |
69%
|
| SXM | SXM - Sint Maarten | 0 |
0%
|
| SVK | SVK - Slovakia | 0 |
0%
|
| SVN | SVN - Slovenia | 0 |
0%
|
| SLB | SLB - Solomon Islands | 0 |
0%
|
| SOM | SOM - Somalia | 0 |
0%
|
| ZAF | ZAF - South Africa | 0 |
0%
|
| SGS | SGS - South Georgia and South Sandwich Islands | 0 |
0%
|
| SSD | SSD - South Sudan | 0 |
0%
|
| ESP | ESP - Spain | 0 |
0%
|
| XSP | XSP - Spratly Islands | 0 |
0%
|
| LKA | LKA - Sri Lanka | 0 |
0%
|
| SDN | SDN - Sudan | 0 |
0%
|
| SUR | SUR - Suriname | 0 |
0%
|
| XSV | XSV - Svalbard | 0 |
0%
|
| SWE | SWE - Sweden | 0 |
0%
|
| CHE | CHE - Switzerland | 0 |
0%
|
| SYR | SYR - Syria | 0 |
0%
|
| TWN | TWN - Taiwan | 0 |
0%
|
| TJK | TJK - Tajikistan | 0 |
0%
|
| TZA | TZA - Tanzania | 0 |
0%
|
| THA | THA - Thailand | 0 |
0%
|
| TLS | TLS - Timor-Leste | 0 |
0%
|
| TGO | TGO - Togo | 0 |
0%
|
| TKL | TKL - Tokelau | 0 |
0%
|
| TON | TON - Tonga | 0 |
0%
|
| TTO | TTO - Trinidad and Tobago | 0 |
0%
|
| XTR | XTR - Tromelin Island | 0 |
0%
|
| TUN | TUN - Tunisia | 0 |
0%
|
| TUR | TUR - Turkey | 0 |
0%
|
| TKM | TKM - Turkmenistan | 0 |
0%
|
| TCA | TCA - Turks and Caicos Islands | 0 |
0%
|
| TUV | TUV - Tuvalu | 0 |
0%
|
| UGA | UGA - Uganda | 0 |
0%
|
| UKR | UKR - Ukraine | 0 |
0%
|
| ARE | ARE - United Arab Emirates | 0 |
0%
|
| GBR | GBR - United Kingdom | 0 |
0%
|
| USA | USA - United States | 0 |
0%
|
| AX1 | AX1 - Unknown | 0 |
0%
|
| URY | URY - Uruguay | 0 |
0%
|
| UZB | UZB - Uzbekistan | 0 |
0%
|
| VUT | VUT - Vanuatu | 0 |
0%
|
| VAT | VAT - Vatican City | 0 |
0%
|
| VEN | VEN - Venezuela | 0 |
0%
|
| VNM | VNM - Vietnam | 0 |
0%
|
| VGB | VGB - British Virgin Islands | 0 |
0%
|
| VIR | VIR - U.S. Virgin Islands | 0 |
0%
|
| XWK | XWK - Wake Island | 0 |
0%
|
| WLF | WLF - Wallis and Futuna | 0 |
0%
|
| XWB | XWB - West Bank | 0 |
0%
|
| ESH | ESH - Western Sahara | 0 |
0%
|
| YEM | YEM - Yemen | 0 |
0%
|
| ZMB | ZMB - Zambia | 0 |
0%
|
| ZWE | ZWE - Zimbabwe | 0 |
0%
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.