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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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This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

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Medications Form



Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*guid, nimhid, z1
src_subject_idString20RequiredSubject ID how it's defined in lab/projectcatieid, id, participant_id, ptid, randid, record_id, subject_id, subjid, z2
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired fieldInterviewYear
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.age, intvage, z4
sexString20RequiredSex of the subjectM;FM = Male; F = Femalegender, z5
Mother;Father;Both; Child; Other; Parent
respondent_other_specifyString50RecommendedRespondent: Other (specify)
childmedsIntegerRecommendedIs your child currently taking any medications?0;1;-99;88;770= No ; 1= Yes ; -99= N/A ; 88= Missing ; 77= Refusedcurrent_meds_status
neurolepticsIntegerRecommendedTaking neuroleptics?0::1; 9990=no, 1=yes, 999=missing
neuroleptic_nameString50RecommendedNeuroleptic name?
neuroleptic_doseString25RecommendedNeuroleptic dose?
ssriIntegerRecommendedPatient is currently taking SSRI0;1;-7; 9990=No; 1=Yes; -7=Refused; 999=missingssris
ssri_nameString50RecommendedSSRI name?
ssri_doseString25RecommendedSSRI dose?
antidepressants_otherIntegerRecommendedTaking antidepressants other than SSRIs?0::1; 9990=no, 1=yes, 999=missing
antidepr_other_nameString50RecommendedName of antidepressants other than SSRIs?
antidepr_other_doseString25RecommendedDose of antidepressants other than SSRIs?
stimulantsIntegerRecommendedStimulants1;0;99;-9991= Yes ; 0= No ; 99= D/K ; -999= Missing
stimulant_nameString50RecommendedStimulant name?
mdeidose_stimString50RecommendedDose stimulant medicationstimulant_dose
alpha_2_agonistsIntegerRecommendedAlpha-2 agonists1;0;99;-9991= Yes ; 0= No ; 99= D/K ; -999= Missingalpha_agonists
alpha_agonist_nameString50RecommendedAlpha agonists name?
mdeidose_alphaString50RecommendedDose alpha medicationalpha_agonist_dose
takmdstaIntegerRecommendedmost currently take mood stabilizers
0;1;-7; 999
0=No; 1=Yes; -7=Refused; 999=missingmood_stabilizers, psytr_ms
mood_stabilizer_nameString50RecommendedMood stabilizers name?
mdeidose_moodString50RecommendedDose mood medicationmood_stabilizer_dose
benzodiazepinesIntegerRecommendedTaking benzodiazepines?0::1; 9990=no, 1=yes, 999=missing
benzo_nameString50RecommendedBenzodiazepines name?
benzo_doseString25RecommendedBenzodiazepines dose?
other_medsIntegerRecommendedTaking other psychiatric medicines?0::1; 9990=no, 1=yes, 999=missing
other_med_nameString50RecommendedOther psychiatric medicines name?
other_med_doseString25RecommendedOther psychiatric medicines dose?
lithium_respIntegerRecommendedLithium responder0;10=No; 1=Yes
hypnotic_agentsString100RecommendedHypnotic agents
treatment_responseIntegerRecommendedTreatment response1::41 = no effect; 2 =partial response; 3 =complete response; 4 = inadequate trial/ poor med tolerance/ unknown
visitString50RecommendedVisit namevisitnum, vtypbima, vtypbprs
siteString101RecommendedSiteStudy Sitesiteid
mood_stabilizer_trtrspString100RecommendedTreatment response mood stabilizer0;10=No; 1=Yes
benzo_trtrspString100RecommendedTreatment response Benzodiazepines
antidepress_trtrspString100RecommendedTreatment response antidepressant
antipsychotics_trtrspString100RecommendedTreatment response antipsychotics
hypnotic_agents_trtrspString100RecommendedTreatment response hypnotic agents
charc25bIntegerRecommendedCCI question 25b: If 25=1, is currently taking medication for Parkinson's Disease;0=No,1=Yes
0=No; 1=Yes; 9=Missingpsytr_park
charc15bIntegerRecommendedCCI question 15b: If 15=1, currently taking medication for diabetes/high blood sugar;0=No,1=Yes
0=No; 1=Yes; 9=Missingnpsy_db
diabet_nIntegerRecommendedNumber of Medications to Treat Diabetes-9 = Missingnpsy_dbt_tot
choles_nIntegerRecommendedNumber of Anti Cholesterol Medications-9 = Missingnpsy_chol_tot
apIntegerRecommendedCurrently Taking Antipsychotics0;1;-90=No; 1=Yes; -9=missing
ancolIntegerRecommendedCurrently Taking Anticholinergics0;1;-90=No; 1=Yes; -9=missing
psytr_lithIntegerRecommendedCurrently Taking Lithium0;1;-90=No; 1=Yes; -9=missing
psytr_adIntegerRecommendedCurrently Taking Anti-Depressents0;1;-90=No; 1=Yes; -9=missing
psytr_aaIntegerRecommendedCurrently Taking Anti-Anxiety0;1;-90=No; 1=Yes; -9=missing
psytr_demIntegerRecommendedCurrently Taking Dementia0;1;-90=No; 1=Yes; -9=missing
psytr_othIntegerRecommendedCurrently Taking Other Psychotropics0;1;-90=No; 1=Yes; -9=missing
npsy_htIntegerRecommendedCurrently Taking Hypertension Med0;1;-90=No; 1=Yes; -9=missing
npsy_hrtIntegerRecommendedCurrently Taking Heart/Cardiac Med0;1;-90=No; 1=Yes; -9=missing
npsy_psytIntegerRecommendedCurrently Taking Psychostimulants Med0;1;-90=No; 1=Yes; -9=missing
npsy_cholIntegerRecommendedCurrently Taking Cholesterol Med0;1;-90=No; 1=Yes; -9=missing
npsy_bcIntegerRecommendedCurrently Taking Birth Control Med0;1;-90=No; 1=Yes; -9=missing
npsy_hormIntegerRecommendedCurrently Taking Hormone Med0;1;-90=No; 1=Yes; -9=missing
npsy_othIntegerRecommendedCurrently Taking Other Non-Psychotropic Med0;1;-90=No; 1=Yes; -9=missing
ap_totIntegerRecommendedTotal Antipsychotic Medications-9=missing
ancol_totIntegerRecommendedTotal Anticholinergic Medications-9=missing
psytr_ms_totIntegerRecommendedPsychotropics - Total Mood Stabilizers-9=missing
psytr_ad_totIntegerRecommendedPsychotropics - Total Anti-Depressents-9=missing
psytr_aa_totIntegerRecommendedPsychotropics - Total Anti-Anxiety-9=missing
psytr_dem_totIntegerRecommendedPsychotropics - Total Dementia-9=missing
psytr_park_totIntegerRecommendedPsychotropics - Total Parkinson's-9=missing
psytr_oth_totIntegerRecommendedPsychotropics - Total Other-9=missing
npsy_ht_totIntegerRecommendedTotal Hypertension Medications-9=missing
npsy_hrt_totIntegerRecommendedTotal Heart/Cardiac Medications-9=missing
npsy_psyt_totIntegerRecommendedTotal Psychostimulants Medications-9=missing
npsy_bc_totIntegerRecommendedTotal Birth Control Medications-9=missing
npsy_horm_totIntegerRecommendedTotal Hormone Medications-9=missing
npsy_oth_totIntegerRecommendedTotal Other Non-Psychotropic Med-9=missing
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: medform01 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.