NDA Help Center

Login Dialog

Frequently Asked Questions


NDA Help Center

Filter Cart

The Filter Cart provides a way to query and access data for which you may be interested.  There are multiple places to go query and Add to Filter Cart (Sometimes called Download).  

A few points related to the filter cart are important to understand with the NDA Query/Filter implementation: 

First, the filter cart is populated asyncronously.  So, when you add subjects, sometimes it may take a few minutes to populate.  You can continue to do other things during this time. 

When you are adding your first filter, all data associated with your query will be added to the filter cart (whether it be a collection, a concept, a study, a data structure/elment or subjects). Not all data available for the subjects selected will necessarily be displayed.  For example, if you select the NDA imaging structure image03, and further restrict that query to scan_type fMRI, only fMRI images will appear and only the image03 structure will be available.  However, if you want to see all of the clinical and phenotype, then select, "Find All Subject Data" to see all the data avaialble for those subjects.  

when a secord or third filter is applied, an AND condition is used to determine the subjects that are exist in all filters.  If the subject does not appear in any filter, that subjects data will be excluded from your filter cart. Given the sparcity of data in the NDA, it is possible for no subjects to appear across filters.  If that happens, clear your filter cart, and start over.  

The NDA is looking to enhance query/filtering.  Until additional tools become available, it is best to package more data than you need and then package and download the data and use other tools to further restrict and analyze the data.  If you have any questions on data access, are interested in using avaialble web services or need help accessing data, please contact us for assistance.  

Frequently Asked Questions



Reset Password

NDAR provides a single access to de-identified autism research data. For permission to download data, you will need an NDAR account with approved access to NDAR or a connected repository (AGRE, IAN, or the ATP). For NDAR access, you need to be a research investigator sponsored by an NIH recognized institution with federal wide assurance. See Request Access for more information.

Warning Notice

This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

You have logged in with a temporary password. Please update your password. Passwords must contain 8 or more characters and must contain at least 3 of the following types of characters:

Subscribe to our mailing list

Mailing List(s)
Email Format

You are now leaving the National Database for Autism Research (NDAR) web site to go to:

Click on the address above if the page does not change within 10 seconds.


NDAR is not responsible for the content of this external site and does not monitor other web sites for accuracy.

Accept Terms
Selected Filters
No filters selected

The filters you have selected from various query interfaces will be stored here, in the 'Filter Cart'. The database will be queried using filters added to your 'Filter Cart', when multiple filters are defined, each will be executed using 'AND' logic, so with each filter that is applied the result set gets smaller.

From the 'Filter Cart' you can inspect each of the filters that have been defined, and you also have the option to remove filters. The 'Filter Cart' itself will display the number of filters applied along with the number of subjects that are identified by the combination of those filters. For example a GUID filter with two subjects, followed by a GUID filter for just one of those subjects would return only data for the subject that is in both GUID filters.

If you have a question about the filter cart, or underlying filters please contact the help desk at The NDA Help Desk

Value Range
Data Structures with shared data
No filters have been selected
Switch User

Demographics Assessment



Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/projectpid
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired field
interview_ageIntegerRequiredAge in months at the time of the interview/test/sampling/imaging.0 :: 1260Age is rounded to chronological month. If the research participant is 15-days-old at time of interview, the appropriate value would be 0 months. If the participant is 16-days-old, the value would be 1 month.
genderString20RequiredSex of the subjectM;FM = Male; F = Female
ethnicityString30RequiredEthnicity of participantHispanic or Latino; Not Hispanic or Latino; Unknown
raceString30RequiredRace of study subjectAmerican Indian/Alaska Native; Asian; Hawaiian or Pacific Islander; Black or African American; White; More than one race; Unknown or not reported
group_dcf_cIntegerRecommendedRecruited for DCF or control group?0; 1; 9990= Control; 1= DCF; 999= Not Answeredgroup
guardiansIntegerRecommendedChild's current guardian(s)0::5; 9990= Birth parent; 1= Foster parent; 2= Grandparent; 3= Other relative, 4= Residential center; 5= Other; 999= Not Answered
guardians_otherString50RecommendedIf "other" for previous question, please describe
income_levelIntegerRecommendedAnnual household income?1::7; 9991= <10,000; 2= 10-19,999; 3= 20-29,999; 4= 30-39,999; 5= 40-49,999; 6= >50,000; 7= Unknown; 999= Not Answered
ses_scoreIntegerRecommendedSocial status code as calculated from Parent CARE form1::5; 9991= 8-19; 2= 20-29; 3= 30-39; 4= 40-54; 5= 55-66; 999= Not Answered
das1msString75RecommendedMarital status
educatFloatRecommendedNumber of years in formal education999=Unknown/Missing
cbfmomedu_yrIntegerRecommendedMother's Educational Level (Years of schooling)888 = not applicable; 999 = missing
cbfdadedu_yrIntegerRecommendedFather's Educational Level (Years of schooling)888 = not applicable; 999 = missing
npreadIntegerRecommendedCan participant read written material?0;11 = Yes; 0 = No
clrblindIntegerRecommendedIs the participant colorblind0;1 0=No; 1=Yes
handednessString29RecommendedhandednessR;L;B;999R = Right; L = Left; B = Both
emplstatIntegerRecommendedemployment in the past month1::31=Unemployed (no school or work activity); on disability; homemaker w/ no dependent children (or other family member) in need of daily care-taking; or day program/day hospital attendance only; 2=Volunteer or temp job; sheltered or competitive part-time employment (<20 hrs/wk); full-time mother/father/caretaker of children (or other family member) in need of daily care-taking (e.g., a full-time stay-at-home mom); or part-time student; 3=Competitive employment (20+ hrs/wk); or multiple part-time jobs (20+ hrs/wk); or full-time student
curlsIntegerRecommendedliving situation1::71=Correctional Facility; 2=Homeless Shelter; 3=Treatment Institution; 4=Supervised Facility; 5=Supervised Non-Facility; 6=Assisted/Supported; 7=Independent Living
tohenmod_locIntegerRecommendedTohen Modified Location Code Index. If multiple ratings possible, choose highest rating.0::90 = Unknown or Missing; 1 = Head of household or functional household member; 2 = Alone or with peer; (also, living in a rented room); 3 = With family member under minimal supervision; 4 = Unsupervised boarding home; (also, college dorm or military barracks); 5 = Cooperative apartment; 6 = Halfway house; 7 = With family member under close supervision; 8 = Open quarter-way house OR transitional care unit on hospital grounds; 9 = Hospitalized OR Homeless
tohenmod_vocIntegerRecommendedTohen Modified Vocational Status Index. If multiple ratings possible, choose highest rating0::70 = Unknown or Missing; 1 = Full-time gainful employment; 2 = Full-time student OR homemaker OR mother/father/other caretaker of children (or other family member) in need of daily care-taking (e.g. full-time "stay-at-home mom"); 3 = Part-time student OR part-time gainful employment (30 hrs/wk or less); 4 = Retired; 5 = Full- or part-time volunteer; 6 = On medical or psychiatric leave of absence; 7 = Unemployed (whether or not expected to work)
Data Structure

This page displays the data structure defined for the measure identified in the title and structure short name. The table below displays a list of data elements in this structure (also called variables) and the following information:

  • Element Name: This is the standard element name
  • Data Type: Which type of data this element is, e.g. String, Float, File location.
  • Size: If applicable, the character limit of this element
  • Required: This column displays whether the element is Required for valid submissions, Recommended for valid submissions, Conditional on other elements, or Optional
  • Description: A basic description
  • Value Range: Which values can appear validly in this element (case sensitive for strings)
  • Notes: Expanded description or notes on coding of values
  • Aliases: A list of currently supported Aliases (alternate element names)
  • For valid elements with shared data, on the far left is a Filter button you can use to view a summary of shared data for that element and apply a query filter to your Cart based on selected value ranges

At the top of this page you can also:

  • Use the search bar to filter the elements displayed. This will not filter on the Size of Required columns
  • Download a copy of this definition in CSV format
  • Download a blank CSV submission template prepopulated with the correct structure header rows ready to fill with subject records and upload

Please email the The NDA Help Desk with any questions.

Distribution for DataStructure: demoinc01 and Element:
Chart Help

Filters enable researchers to view the data shared in NDA before applying for access or for selecting specific data for download or NDA Study assignment. For those with access to NDA shared data, you may select specific values to be included by selecting an individual bar chart item or by selecting a range of values (e.g. interview_age) using the "Add Range" button. Note that not all elements have appropriately distinct values like comments and subjectkey and are not available for filtering. Additionally, item level detail is not always provided by the research community as indicated by the number of null values given.

Filters for multiple data elements within a structure are supported. Selections across multiple data structures will be supported in a future version of NDA.