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Frequently Asked Questions


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Filter Cart

The Filter Cart provides a powerful way to query and access data for which you may be interested.  

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 run a query, it may take a moment to populate but this will happen in the background so you can define other queries 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 structures or collections 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 shown.  To see other data structures, select "Find All Subject Data" which will query all data for those subjects. When a secord or third filter is applied, an AND condition is used.  A subject must exist in all filters.  If the subject does not appear in any one filter, that subjects data will not be included in your filter cart. If that happens, clear your filter cart, and start over.  

It is best to package more data than you need and access those data using other tools, independent of the NDA (e.g. miNDAR snapshot), to limit the data selected.  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



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

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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.

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Legal Involvement Form



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/projectid
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired fieldadate
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.
sexString20RequiredSex of the subjectM;FM = Male; F = Femalegender
visitString50RecommendedVisit nametpoint
lifa1IntegerRecommendedHave you ever had a drivers license? If No, please skip to item 7.0;10 = No; 1 = Yeslifc1, lifp1, lifs1
lifa2IntegerRecommendedAt what age did you obtain a drivers license?lifc2, lifp2, lifs2
lifa3IntegerRecommendedHow many times have you ever been pulled over by the police while driving?lifc3, lifp3, lifs3
lifa4IntegerRecommendedHow many motor vehicle accidents/collisions have you ever been involved in while driving?lifc4, lifp4, lifs4
lifa5IntegerRecommendedHave you ever received a traffic ticket from the police?0;10 = No; 1 = Yeslifc5, lifp5, lifs5
lifa5aIntegerRecommendedHow many times have you received a traffic ticket from the police?lifc5a, lifp5a, lifs5a
lifa5g_specString255RecommendedList all reasons for which you received a traffic ticket0;10 = No; 1 = Yeslifc5g_spec, lifp5g_spec, lifs5g_spec
dba8IntegerRecommendedHave you ever had your license revoked or suspended?0;10=No; 1=Yeslifa6, lifc6, lifp6, lifs6
dba8tiIntegerRecommendedIf you have ever had your license revoked or suspended how many times was it revoked or suspended?lifa6a, lifc6a, lifp6a, lifs6a
lifa6g_specString255RecommendedList all reasons for which your license has been suspended or revokedlifc6g_spec, lifp6g_spec, lifs6g_spec
lifa7IntegerRecommendedHave you ever been picked up by the police, but not charged?0;10 = No; 1 = Yeslifc7, lifp7, lifs7
lifa7aIntegerRecommendedHow many times have you been picked up by the police, but not charged?lifc7a, lifp7a, lifs7a
lifa7d_specString255RecommendedList all reasons for which you were picked up by the police, but not charged?lifc7d_spec, lifp7d_spec, lifs7d_spec
lifa8IntegerRecommendedHave you ever been arrested?0;10 = no; 1 = Yeslifc8, lifp8, lifs8
lifa8aIntegerRecommendedHow many times have you been arrested?lifc8a, lifp8a, lifs8a
lifa8h_specString255RecommendedList all reasons for which you have been arrestedlifc8h_spec, lifp8h_spec, lifs8h_spec
lifa9IntegerRecommendedHave you ever been convicted?0;10 = no; 1 = Yeslifc9, lifp9, lifs9
lifa9aIntegerRecommendedHow many times have you been convicted?lifc9a, lifp9a, lifs9a
lifa9h_juvString255RecommendedList all reasons for which you were convicted as a juvenilelifc9h_juv, lifp9h_juv, lifs9h_juv
lifa9h_aduString255RecommendedList all reasons for which you were convicted as an adultlifc9h_adu, lifp9h_adu, lifs9h_adu
lifa9h_misdString255RecommendedList all misdemeanor convictionslifc9h_misd, lifp9h_misd, lifs9h_misd
lifa9h_felString255RecommendedList all felony convictionslifc9h_fel, lifp9h_fel, lifs9h_fel
lifa10IntegerRecommendedHave you ever been on probation?0;10 = no; 1 = Yeslifc10, lifp10, lifs10
lifa10aIntegerRecommendedHow many times have you been on probation?lifc10a, lifp10a, lifs10a
lifa10h_juvString255RecommendedList all reasons you have been on probation as a juvenilelifc10h_juv, lifp10h_juv, lifs10h_juv
lifa10h_aduString255RecommendedList all reasons you have been on probation as an adultlifc10h_adu, lifp10h_adu, lifs10h_adu
lifa11IntegerRecommendedHas the participant ever been incarcerated?0;10 = no; 1 = Yeslifc11, lifp11, lifs11
lifa11aIntegerRecommendedHow many times have you been incarcerated?lifc11a, lifp11a, lifs11a
lifa11g_specString255RecommendedList all reasons for which you have been incarceratedlifc11g_spec, lifp11g_spec, lifs11g_spec
lifa12IntegerRecommendedHave you ever been admitted to a juvenile detention center?0;10 = no; 1 = Yeslifc12, lifp12, lifs12
lifa12aIntegerRecommendedHow many times have you been admitted to a juvenile detention center?lifc12a, lifp12a, lifs12a
lifa12b_coIntegerRecommendedWho ordered the admission to the juvenile detention center?1;21= Court Ordered; 2= Voluntarily Admittedlifc12b_co, lifp12b_co, lifs12b_co
lifa12j_specString255RecommendedList all reasons for which you have been admitted to a juvenile detention centerlifc12j_spec, lifp12j_spec, lifs12j_spec
lifa13IntegerRecommendedHave you ever been admitted to rehabilitation facility/residential treatment facility (RTF)?0;10 = no; 1 = Yeslifc13, lifp13, lifs13
lifa13aIntegerRecommendedHow many times have you been admitted to rehabilitation facility/residential treatment facility (RTF)?lifc13a, lifp13a, lifs13a
lifa13b_coIntegerRecommendedWho ordered the admission to the rehabilitation facility/residential treatment facility (RTF)?1;21= Court Ordered; 2= Voluntarily Admittedlifc13b_co, lifp13b_co, lifs13b_co
lifa13g_specString255RecommendedList all reasons for which you have been admitted to the rehabilitation facility/residential treatment facility (RTF)?lifc13g_spec, lifp13g_spec, lifs13g_spec
version_formString100RecommendedForm used/assessment name
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: legalinvf01 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.