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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



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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.

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Selected Filters
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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
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ABCD Pubertal Hormone Saliva



Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredConditionDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/project
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
visitString50RecommendedVisit nameeventname
hormone_sal_sexIntegerRecommendedHormone saliva sample tube cap color:1::51 = Pink (female); 2 = Blue (male); 3 = Participant unable to complete; 4 = Participant/Parent refused; 5 = Not collected (other)
hormone_sal_wake_yString30Recommended hormone_sal_sex == 1 || hormone_sal_sex == 2What time did you wake up today?
hormone_sal_caff_yIntegerRecommended hormone_sal_sex == 1 || hormone_sal_sex == 2Have you had any caffeine in the last 12 hours?0 ; 11 = Yes; 0 = No
hormone_sal_caff_mg_yString30Recommended hormone_sal_caff_y ==1How many drinks (mg) did you have? RA: Please use the following link to determine total miligrams per serving size and open the link in new window: caffeine chartrecord drinks as total miligrams (use 'caffeine chart' link)
hormone_sal_activeIntegerRecommended hormone_sal_sex == 1 || hormone_sal_sex == 2In the last 12 hours, did you exercise vigorously (sweating, breathing hard) for at least 20 minutes?0 ; 11 = Yes; 0 = No
hormone_sal_active_minutes_yString30Recommended hormone_sal_active == 1For how long did you exercise?record time as minutes, minimum is approx 20 minutes
hormone_sal_start_yString30Recommended hormone_sal_sex == 1 || hormone_sal_sex == 2Hormone saliva sample time collection started?
hormone_sal_end_yString30Recommended hormone_sal_sex == 1 || hormone_sal_sex == 2Hormone saliva sample time collection finished?
hormone_sal_bc_yString30Recommended hormone_sal_sex == 1 || hormone_sal_sex == 2Hormone saliva barcode:Use the Barcode Scanner - do NOT type barcode label
hormons_sal_freeztemp_yIntegerRecommended hormone_sal_sex == 1 || hormone_sal_sex == 2Hormone sample storage temperature:1 ; 21 = -20 C freezer; 2 = -80 C freezer | Indicate temperature of 3-month storage freezer here.
hormone_sal_freezer_yString30Recommended hormone_sal_sex == 1 || hormone_sal_sex == 2Time sample moved to freezer:
hormon_sal_notes_y___1IntegerConditional hormone_sal_sex == 1 || hormone_sal_sex == 2Note any concerns about sample (all that apply) (1, None)0 ; 10 = No; 1 = Yes
hormon_sal_notes_y___2IntegerConditional hormone_sal_sex == 1 || hormone_sal_sex == 2Note any concerns about sample (all that apply) ( 2, Contaminated)0 ; 10 = No; 1 = Yes
hormon_sal_notes_y___3IntegerConditional hormone_sal_sex == 1 || hormone_sal_sex == 2Note any concerns about sample (all that apply) ( 3, Discoloration)0 ; 10 = No; 1 = Yes
hormon_sal_notes_y___4IntegerConditional hormone_sal_sex == 1 || hormone_sal_sex == 2Note any concerns about sample (all that apply) ( 4, Excessive bubbles)0 ; 10 = No; 1 = Yes
hormon_sal_notes_y___5IntegerConditional hormone_sal_sex == 1 || hormone_sal_sex == 2Note any concerns about sample (all that apply) ( 5, Very little saliva provided)0 ; 10 = No; 1 = Yes
hormon_sal_notes_y___6IntegerConditional hormone_sal_sex == 1 || hormone_sal_sex == 2Note any concerns about sample (all that apply) ( 6, Other)0 ; 10 = No; 1 = Yes
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: sph01 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.