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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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Anticonvulsant Drug Level



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/projectrandid
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
siteString101RecommendedSiteStudy Sitesiteid
visitString50RecommendedVisit nameint1, interval
completedIntegerRecommendedChecks if completed0::30=No; 1=Yes; 2=Yes, lost; 3=Unverifiedformcomp, frmcomp
subtrial_nameIntegerRecommendedName of subtrial1::31=Crossover; 2=Guanfacine; 3= Open Label MPH
adl_q01IntegerRecommendedDate of blood draw in days from the randomization date (ADL_Q01 = Date of blood draw - randomization date)drawdate
drawtimeString20Recommendedtime of blood drawadl_q02
adl_q03IntegerRecommendedDate of last study med taken in days from the randomization date (ADL_Q03 = Date of last dose of study medication - randomization date)-888=NAdatemed
adl_q04String20RecommendedTime of last study med-888=NAmedtime
adl_q05IntegerRecommendedDate of last anticonvulsant taken in days from the randomization date (ADL_Q05 = Date of last dose of anticonvulsant - randomization date)dateanti
adl_q06String20RecommendedTime of last anticonvulsantantitime
adl_q07aIntegerRecommendedPhenytoin test ordered1;21=Yes 2=Nophenytn
adl_q07bIntegerRecommendedCarbamazepine test ordered1;21=Yes 2=Nocarbamaz
adl_q07cIntegerRecommendedValproate test ordered1;21=Yes 2=Novalproat
adl_q07dIntegerRecommendedLamotrigine test ordered1;21=Yes 2=Nolamotrig
adl_q07eIntegerRecommendedGabapentin test ordered1;21=Yes 2=Nogabapent
adl_q07fIntegerRecommendedOther1 test ordered1;21=Yes 2=Noother1
adlq07fsString50RecommendedOther1 test specifyspec1
adl_q07gIntegerRecommendedOther2 test ordered1;21=Yes 2=Noother2
adlq07gsString50RecommendedOther2 test specifyspec2
daysrzIntegerRecommendeddays since randomizationstudyday, visitdt
blooddrawIntegerRecommendedWas blood drawn for tests?1;21= Yes 2= No 1 Or 2 Or Is Nullblood
ci_enrolledIntegerRecommendedParticipant enrolled0;10=No; 1=Yesenrolled
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
wk_seizure_medIntegerRecommendedSeizure. Medication Used (Details in next section)0;1No = 0; Yes = 1;
other_reason_ncString100RecommendedOther reason form was not completed
txrispIntegerRecommendedtreatment risperidone1;0;-70=No; 1=Yes;-7=Refused
arioralIntegerRecommendedCode indicating aripiprazole oralCode=1
carbacsIntegerRecommendedcarbamazepine clinic signif0;1;-70=No; 1=Yes; -7=Refused
blfnrvallevFloatRecommendedNon-randomized medication - Valproate levelug/mL
iaothIntegerRecommendedother action taken0;1;-4;-5;-6;-7;-80=No; 1=Yes; -4=Missing; -5=N/A; -6=Unknown; -7=Refused; -8=Not on original form
aef008aString200RecommendedIf other action taken, specify
log011String50RecommendedPatients chart (e.g., hard copy, electronic, or other medical record) reviewed?0;1;-888;-9990=No; 1=Yes; -888=Not Applicable; -999=Missing;
valpcsIntegerRecommendedvalproate clinically signif0;1;-70=No; 1=Yes; -7=Refused
carbrstFloatRecommendedLab test result: Carbamazepine ug/ml
lamotrstFloatRecommendedLab test result: Lamotrigine ug/ml
lamotsgIntegerRecommendedLamotrigine: clinically significant0;1;-70=No; 1=Yes; -7=Refused
oth1rstFloatRecommendedLab test result: Other 1: ug/ml
other1sgIntegerRecommendedLab test result: Other 1: significant change?0;1; -70=No; 1=Yes; -7=Refused
sigp1IntegerRecommendedPhysician signature present0;10 = No; 1 = Yes
sigd1IntegerRecommendedPhysician/PI signature date (days since randomization)
form_explainIntegerRecommendedWhy was this form not completed?86::9999=Participant unable to complete due to cognitive impairment; 98=Participant unable to complete due to physical impairment; 97=Participant refused to begin/finish; 96=Participant completed but with less than best effort; 95=Participant unable to be contacted; 94=Participant deceased; 93=Participant withdrew consent; 92=Time constraints; 91=Rater forgot to administer; 90=Missed appointment; 89=Participant was terminated from study; 88=Other;87 = Not Done (reason unspecified); 86 = Not Applicable
study_drug_teamString30RecommendedStudy drugBaseline; Risperidone; Valproate; Lithium; Blinded Therapy; Hypericum; Placebo; Sertraline; Aripiprazole; NA
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: adl01 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.