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Frequently Asked Questions


NDA Help Center

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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Clinical History 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/projectsubject_id
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.
sexString20RequiredSex of the subjectM;FM = Male; F = Femalegender
chf_01IntegerRecommended1. Did the participant receive vagus nerve stimulation during the index episode?0;10=No; 1=Yes
chf_02IntegerRecommended2. Did the participant receive an ECT during the index episode?0;10=No; 1=Yes
chf_03IntegerRecommended3. Did the participant receive rTMS during the index episode?0;10=No; 1=Yes
chf_04IntegerRecommended4. Has the participant experienced any other somatic treatments during the index episode?0;10=No; 1=Yes
chf_05String250RecommendedType of other treatment
chf_06IntegerRecommended5. Is the participant receiving psychotherapy that is depression-specific (CBT or IPT)?0;10=No; 1=Yes
chf_07String250RecommendedType of psychotherapy
chf_08IntegerRecommended6. Is the participant currently enrolled in another research study that contraindicates participation in the EMBARC study?0;10=No; 1=Yes
chf_09String250RecommendedTitle of study
chf_10IntegerRecommended7. Does the participant have any history of adequate treatment (dose and duration) with poor response to either Sertraline (SERT) or Bupropion (BUP)?0;10=No; 1=Yes
chf_11IntegerRecommended8. Does the participant have any history of poor tolerance to Sertraline (SERT) or Bupropion (BUP) treatment?0;10=No; 1=Yes
chf_12IntegerRecommended9. Has the participant taken fluoxetine in the past 6 weeks?0;10=No; 1=Yes
chf_12aDateRecommendedLast date taken - fluoxetine
chf_13IntegerRecommended10. Has the participant taken benzodiazepine in the past 4 days?0;10=No; 1=Yes
chf_13aDateRecommendedLast date taken - benzo
chf_14IntegerRecommended11. Has the participant taken any other antidepressants other than those listed above in the last 3 weeks?0;10=No; 1=Yes
chf_14aDateRecommendedLast date taken - other antidepressants
chf_date1DateRecommendedDate field of first suicide attempt
chf_date2DateRecommendedDate field of 2nd suicide attempt
chf_date3DateRecommendedDate field of 3rd suicide attempt
chf_date4DateRecommendedDate field of 4th suicide attempt
chf_date5DateRecommendedDate field of 5th suicide attempt
chf_hospital1IntegerRecommendedChecks if hospitalized on 1st attempt0;10=No; 1=Yes
chf_hospital2IntegerRecommendedChecks if hospitalized on 2nd attempt0;10=No; 1=Yes
chf_hospital3IntegerRecommendedChecks if hospitalized on 3rd attempt0;10=No; 1=Yes
chf_hospital4IntegerRecommendedChecks if hospitalized on 4th attempt0;10=No; 1=Yes
chf_hospital5IntegerRecommendedChecks if hospitalized on 5th attempt0;10=No; 1=Yes
chf_method1String250Recommended1st suicide attempt method
chf_method2String250Recommended2nd suicide attempt method
chf_method3String250Recommended3rd suicide attempt method
chf_method4String250Recommended4th suicide attempt method
chf_method5String250Recommended5th suicide attempt method
chf_num_suicide_attemptsIntegerRecommendedChecks number of suicide attempts
chf_outcome1String250RecommendedChecks for outcome after 1st attempt
chf_outcome2String250RecommendedChecks for outcome after 2nd attempt
chf_outcome3String250RecommendedChecks for outcome after 3rd attempt
chf_outcome4String250RecommendedChecks for outcome after 4th attempt
chf_outcome5String250RecommendedChecks for outcome after 5th attempt
chf_rate_suicide_lifetimeIntegerRecommendedRates suicide over lifetime1::71=Absent; 2=Thoughts of dying but no thoughts of suicide; 3=Occasional thoughts of suicide but no plans; 4=Often thought about suicide or has thought of a specific method; 5=Had a plan or made a gesture; 6=Made preparation for a potentially serious suicide attempt; 7=Suicide attempt with definite intent to die or be potentially medically harmful
chf_wash_benzoDateRecommendedActual washout date (Benzo)
chf_wash_fluoxDateRecommendedActual washout date fluoxetine
chf_wash_otherDateRecommendedActual washout date (Other)
subject_descriptionString4,000RecommendedSubject related information (e.g the affection, phenotype, disease information, etc.).
siteString101RecommendedSiteStudy Site
weekFloatRecommendedWeek in level/study99=week 10-week 14
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: chf01 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.