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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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Knee X-Ray Joint Space Width Measurements



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/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
ageyearsIntegerRecommendedAge in years
nommjswIntegerRecommendedmedial mJSW cannot be measured due to poor positioning, image quality or other reason0;10=No; 1=Yes
jsw300FloatRecommendedmedial JSW at x=0.300 [mm]
jsw200FloatRecommendedmedial JSW at x=0.200 [mm]
file_sourceString1,024RecommendedFile name/location
jsw225FloatRecommendedmedial JSW at x=0.225 [mm]
mjswbbIntegerRecommendedmJSW is set to zero, used when reader judges bone on bone in medial compartment0;10=No; 1=Yes
noljswxIntegerRecommendedlateral JSW(x) cannot be measured due to poor positioning or poor image quality0;10=No; 1=Yes
incstpsIntegerRecommendedinconsistent positioning at one or more visits based on rim distance0;10=No; 1=Yes
jsw250FloatRecommendedmedial JSW at x=0.250 [mm]
jsw150FloatRecommendedmedial JSW at x=0.150 [mm]
ljsw725FloatRecommendedlateral JSW at x=0.725 [mm]
ljsw825FloatRecommendedlateral JSW at x=0.825 [mm]
ljsw800FloatRecommendedlateral JSW at x=0.800 [mm]
ljsw900FloatRecommendedlateral JSW at x=0.900 [mm]
barcdbuString20Recommendedbarcode of image analyzedbarcdjd
ljsw700FloatRecommendedlateral JSW at x=0.700 [mm]
cfwdthFloatRecommendedwidth of femoral condyles used to define x=1.0 [mm]
sideIntegerRecommendedside0::30= neither;1=left; 2=right; 3=bilateral
nolminIntegerRecommendedmedial mJSW measured but there is no local minimum0;10=No; 1=Yes
tpcfdsFloatRecommendeddistance from tibial plateau to tibial rim closest to femoral condyle [mm]
impixszFloatRecommendedpixel size used for convertion from pixel units to millimetres (uncorrected for magnification of knee) [mm]
jsw175FloatRecommendedmedial JSW at x=0.175 [mm]
versionString20RecommendedVersion/code of assessment
jsw275FloatRecommendedmedial JSW at x=0.275 [mm]
mcmjswFloatRecommendedkXR reading (JD): medial minimum JSW [mm]
ltpmebeIntegerRecommendedlateral tibial plateau margin is the same as the bone edge0;10=No; 1=Yes
bmangFloatRecommendedx- ray beam angle from Synaflexer phantom [degrees]
xmjswFloatRecommendedx coordinate of minimum JSW
ljsw875FloatRecommendedlateral JSW at x=0.875 [mm]
incplmIntegerRecommendedincomplete delineation of medial compartment - some JSW(x) set to .T0;10=No; 1=Yes
visitString50RecommendedVisit nameCharacter description of each type of visit
incpllIntegerRecommendedincomplete delineation of lateral compartment - some JSW(x) set to .T0;10=No; 1=Yes
ljsw775FloatRecommendedlateral JSW at x=0.775 [mm]
ljsw750FloatRecommendedlateral JSW at x=0.750 [mm]
ljsw850FloatRecommendedlateral JSW at x=0.850 [mm]
nomjswxIntegerRecommendedmedial JSW(x) cannot be measured due to poor positioning or poor image quality0;10=No; 1=Yes
femlenFloatRecommendedflXR reading (JD): femoral length from full limb x-ray (mm)
tiblenFloatRecommendedflXR reading (JD): tibia length from full limb x-ray (mm)
appllFloatRecommendedflXR reading (JD): femur length plus tibia length from full limb x-ray (mm)
xrjslFloatRecommendedkXR reading (BU): joint space narrowing (OARSI grades 0- 3) lateral compartment0::3
xrjsmFloatRecommendedkXR reading (BU): joint space narrowing (OARSI grades 0- 3) medial compartment0::3
xrklIntegerRecommendedkXR reading (BU): Kellgren and Lawrence (grades 0- 4)0::4
jsprgIntegerRecommendedJSL Progressor0;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: kxrqjsw01 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.