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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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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

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Mattis Dementia Rating Scale



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/projectsubjid
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
drseIntegerRecommendedComplex Verbal - Initiation/Perseveration (Naming U. S. States)
drsfIntegerRecommendedSimple Verbal - Initiation/Perseveration (Naming colors found in the room)
drsgIntegerRecommendedConsonant Perseveration (Say, 'gee-key-bee' four times.)0;10 = not able to say, 'gee-key-bee' four times;1 = able to say, 'gee-key-bee' four times
drshIntegerRecommendedVowel Perseveration (Say, 'boh-bah-bee' four times.)0;10 = not able to say, 'boh-bah-bee' four times;1 = able to say, 'boh-bah-bee' four times
drsiIntegerRecommendedDouble Alternating Movements 1 (Palm up/palm down, five repetitions)0;10 = not able to perform palm up/palm down for five repetitions;1 = able to perform palm up/palm down for five repetitions
drsjIntegerRecommendedDouble Alternating Movements 2 (Clenched/extended five repetitions)0;10 = not able to perform clenched/extended for five repetitions;1 = able to perform clenched/extended for five repetitions
drskIntegerRecommendedAlternate Tapping (Tap left/tap right 10 repetitions)0;10 = not able to perform tap left/tap right for 10 repetitions;1 = able to perform tap left/tap right for 10 repetitions
drslIntegerRecommendedGraphomotor Design 1 (Reproduction ramparts five consecutive alternating 'square-semi circle waves')0;10 = not able to reproduce ramparts for five consecutive alternating square-semi circle waves;1 = able to reproduce ramparts for five consecutive alternating square-semi circle waves
drsmIntegerRecommendedGraphomotor Design 2 (Reproduction of semi circle)0;10 = not able to reproduce semi circle;1 = able to reproduce semi circle
drsnIntegerRecommendedGraphomotor Design 3 (Reproduction of cross)0;10 = not able to reproduce cross;1 = able to reproduce cross
drsoIntegerRecommendedGraphomotor Design 4 (Reproduction of at least five consecutive alternating cross and semi circle pairs)0;10 = not able to reproduce at least five consecutive alternating cross and semi circle pairs;1 = able to reproduce at least five consecutive alternating cross and semi circle pairs
drs2IntegerRecommendedIP Raw Score (0-37)sum of all items if none are missing
siteString100RecommendedSiteStudy Site
weekFloatRecommendedWeek in level/study99=week 10-week 14intid
study_idIntegerRecommendedStudy ID number46=Acute Phase; 47=Stabilization Phase
drsaIntegerRecommendedDRS-ATT: Digit Span Range0::8
drsabIntegerRecommendedDRS-CONCEPT:Verbal Recall-Sentence Ini0;1
drsadIntegerRecommendedDRS-ATT: Counting Distraction 10::6
drsaeIntegerRecommendedDRS-ATT: Counting Distraction 20::5
drsafIntegerRecommendedDRS-MEM:Verbal Recall-Reading0::4
drsagIntegerRecommendedDRS-MEM:Verbal Recall-Initiation0::3
drsahIntegerRecommendedDRS-ATT:Verbal Recognition-Presentation0::4
drsaiIntegerRecommendedDRS-MEM:Verbal Recognition0::5
drsajIntegerRecommendedDRS-ATT:Visual Matching (Attention) Range0::4
drsakIntegerRecommendedDRS-MEM:Visual Memory0::4
drsbIntegerRecommendedDRS-ATT:Two Successive Commands Range0::2
drscIntegerRecommendedDRS-ATT: Single Command Range0::4
drsdIntegerRecommendedORS-ATT: Imitation (Attention) Range0::4
drspIntegerRecommendedDRS-CONST Vertical:1 Lines0;10 = Not Able; 1 = Able
drsqIntegerRecommendedDRS-CONST:2 Diamond In Box0;10 = Not Able; 1 = Able
drsrIntegerRecommendedDRS-CONST:3 Square And Diamond0;10 = Not Able; 1 = Able
drssIntegerRecommendedDRS-CONST:4 Diamond0;10 = Not Able; 1 = Able
drstIntegerRecommendedDRS-CONST:5 Square0;10 = Not Able; 1 = Able
drsuIntegerRecommendedDRS-CONST Signature:60;10 = Not Able; 1 = Able
drsvIntegerRecommendedDRS-CONCEPT: Identities and Oddities0::16
drsxIntegerRecommendedDRS-CONCEPT:Priming Inductive Reasoning0::3
drszIntegerRecommendedDRS-CONCEPT:Similarities- Mult Choice0::8
drstotFloatRecommendedDRS-Raw Total Scoresum of DrsA to DrsZ
drs1FloatRecommendedDRS-ATT:Attentionsum of DrsA,DrsAD,DrsAE,DrsAH,DrsAJ,DrsB,DrsC,DrsD
drs3FloatRecommendedDRS-CONST:Constructionsum of DrsP,DrsQ,DrsR,DrsS,DrsT,DrsU
drs4FloatRecommendedDRS-CONCEPT:Conceptualizationsum of DrsAB,DrsV,DrsW,DrsX,DrsY,DrsZ
drs5FloatRecommendedDRS-MEM: Memorysum of DrsAC,DrsAF,DrsAG,DrsAl,DrsAK
days_baselineIntegerRecommendedDays since baseline
visnumFloatRecommendedNumeric Visit Number-1.5 = Pre-Screening; -1 = Screening; 0 = Baseline; ## = Visit ## (from 1 to 10); Whole numbers = standard monthly visits; #.001 - #.009 = Unscheduled; #.1 = End of Phase 1; #.2 = End of Phase 2; #.3 = End of Phase 3; #.4 = End of Open Choice Phase; #.5 = End of Study; #.6 = Genetic Analysis; 1000=all visits
me2IntegerRecommendedStatus0;10 = Past [Inactive]; 1 = Active
version_formString100RecommendedForm used/assessment name
visitString50RecommendedVisit nameCharacter description of each type of visit
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: mdrs01 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.