NDA Help Center

Login Dialog

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



Reset Password

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.

Warning Notice

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.

Update Password

You have logged in with a temporary password. Please update your password. Passwords must contain 8 or more characters and must contain at least 3 of the following types of characters:

  • Uppercase
  • Lowercase
  • Numbers
  • Special Characters limited to: %,_,!,@,#,$,-,%,&,+,=,),(,*,^,:,;

Subscribe to our mailing list

Mailing List(s)
Email Format

You are now leaving the NIMH Data Archive (NDA) web site to go to:

Click on the address above if the page does not change within 10 seconds.


NDA is not responsible for the content of this external site and does not monitor other web sites for accuracy.

Accept Terms
Filter Cart
No filters selected
Value Range
Data Structures with shared data
No filters have been selected
Switch User

Drug Screen



Download Definition as
Download Submission Template as
Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*guid, nimhid
src_subject_idString20RequiredSubject ID how it's defined in lab/projectptid, subject_id
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired fieldintvdate, testdate, tox_1, udsdtm, visit_date
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
sexString20RequiredSex of the subjectM;FM = Male; F = Femalegender, sex
macipds_01IntegerRecommendedVisit drug screen was performed at:
1=Clinical Visit 1; 2=Clinical Visit 2; 3= Scan Session 1; 4= Scan Session; -999=Don't Know/Missing Datauds_visit
macipds_02IntegerRecommendedPositive for amphetamines?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Dataamphetam, amphetamine, tox_5, uds001a, uds_01, urinedrugamphetamines, utox4
macipds_03IntegerRecommendedPositive for cocaine?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Datacocaine, tox_6, uds005a, uds_04, urinedrugcocaine, utox3
macipds_04IntegerRecommendedPositive for marijuana?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Datamarijuana, tox_7, uds_10, urinedrugcannabis
macipds_05IntegerRecommendedPositive for methamphetamines?
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; -999=Don't Know/ Missing Datamethamph, methamphetamine, uds_05
macipds_06IntegerRecommendedPositive for opiates?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Datamorphine, opiates, tox_8, uds007a, uds_07, urinedrugopiates, utox6
macipds_07IntegerRecommendedPositive for PCP?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Datapcp, phencyclidine, tox_9, uds008a, uds_09, urinedrugpcp
macipds_08IntegerRecommendedPositive for benzodiazepines?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Databenzodiazepines, tox_10, uds003a, uds_03, urinedrugbenzos, utox2
macipds_09IntegerRecommendedPositive for barbiturates?
0::4; 9; -999
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; 9= Did not perform; -999=Don't Know/ Missing Databarbitur, barbiturates, tox_11, uds002a, uds_02, urinedrugbarbiturates, utox7
macipds_10IntegerRecommendedPositive for methadone?
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; -999=Don't Know/ Missing Datamethadon, methadone, tox_12, uds006a, uds_06
macipds_11IntegerRecommendedPositive for MDMA?
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessed; -999=Don't Know/ Missing Datamdma, tox_13
comments_miscString4,000RecommendedMiscellaneous comments on study, interview, methodology relevant to this form dataadditionalcomments, macipds_12
uds001bIntegerRecommendedAmphetamines excludes
0=No; 1=Yes; -9=Unknown
uds001cString200RecommendedAmphetamines commentsurinedrugamphetamines_other
uds002bIntegerRecommendedBarbiturates excludes
0=No; 1=Yes; -9=Unknown
uds002cString200RecommendedBarbiturates commentsurinedrugbarbiturates_other
uds003bIntegerRecommendedBenzodiazepines excludes
0=No; 1=Yes; -9=Unknown
uds003cString200RecommendedBenzodiazepines commentsurinedrugbenzos_other
uds004aIntegerRecommendedCannabinoids results
1=Positive; 2=Negative; 3=Results not valid; 4=Not assessed; -9=Unknownthc, utox5
uds004bIntegerRecommendedCannabinoids excludes
0=No; 1=Yes; -9=Unknown
uds004cString200RecommendedCannabinoids commentsurinedrugcannabis_other
uds005bIntegerRecommendedCocaine Metabolite excludes
0=No; 1=Yes; -9=Unknown
uds005cString200RecommendedCocaine Metabolite commentsurinedrugcocaine_other
uds006bIntegerRecommendedMethadone excludes
0=No; 1=Yes; -9=Unknown
uds006cString200RecommendedMethadone comments
uds007bIntegerRecommendedOpiates excludes
0=No; 1=Yes; -9=Unknown
uds007cString200RecommendedOpiates commentsurinedrugopiates_other
uds008bIntegerRecommendedPhencyclidine excludes
0=No; 1=Yes; -9=Unknown
uds008cString200RecommendedPhencyclidine commentsurinedrugpcp_other
utoxcldtDateRecommendedUrine Tox Screen Collection Date Completed
lab020DateRecommendedDate of PI/clinician signature
visitString50RecommendedVisit namevisitnum
siteString101RecommendedSiteStudy Sitesiteid
completedIntegerRecommendedChecks if completed0::30=No; 1=Yes; 2=Yes, lost; 3=Unverified
urine_collection_timeString10RecommendedUrine Measures: Time of urine collection
uri_doaDateRecommendedDate of analysisu1_coc_doa
uri_timString10RecommendedTester read end timeu1_coc_anatime
uri_vrtString10RecommendedVerification read timeu1_coc_vertime
uri_cocvIntegerRecommendedCocaine results performed by verifier0;10=Negative; 1=Positive
uri_mavIntegerRecommendedMethamphetamines results performed by verifier0;10=Negative; 1=Positive
uri_thctIntegerRecommendedTHC results performed by tester0;10=Negative; 1=Positiveu1_thc_result
uri_thcvIntegerRecommendedTHC results performed by verifier0;10=Negative; 1=Positive
uri_opivIntegerRecommendedOpiates results performed by verifier0;10=Negative; 1=Positive
uri_benvIntegerRecommendedBenzodiazepines results performed by verifier0;10=Negative; 1=Positive
uri_redoIntegerRecommendedUrine test: re-do0;10=No; 1=Yes
uri_coct2IntegerRecommendedCocaine results performed by tester: re-do0;10=Negative; 1=Positive
uri_cocv2IntegerRecommendedCocaine results performed by verifier: re-do0;10=Negative; 1=Positive
uri_mat2IntegerRecommendedMethamphetamines results performed by tester: re-do0;10=Negative; 1=Positive
uri_mav2IntegerRecommendedMethamphetamines results performed by verifier: re-do0;10=Negative; 1=Positive
uri_thct2IntegerRecommendedTHC results performed by tester: re-do0;10=Negative; 1=Positive
uri_thcv2IntegerRecommendedTHC results performed by verifier: re-do0;10=Negative; 1=Positive
uri_opit2IntegerRecommendedOpiates results performed by tester: re-do0;10=Negative; 1=Positive
uri_opiv2IntegerRecommendedOpiates results performed by verifier: re-do0;10=Negative; 1=Positive
uri_bent2IntegerRecommendedBenzodiazepines results performed by tester: re-do0;10=Negative; 1=Positive
uri_benv2IntegerRecommendedBenzodiazepines results performed by verifier: re-do0;10=Negative; 1=Positive
uri_coctIntegerRecommendedCocaine results performed by tester0;10=Negative; 1=Positiveu1_coc_result
uri_matIntegerRecommendedMethamphetamines results performed by tester0;10=Negative; 1=Positiveu1_ma_result
uri_opitIntegerRecommendedOpiates results performed by tester0;10=Negative; 1=Positiveu1_opi_result
uri_bentIntegerRecommendedBenzodiazepines results performed by tester0;10=Negative; 1=Positiveu1_ben_result
gen002DateRecommendedCollection Date: (mm/dd/yyyy)uds00a, uri_doc
uri_stString10RecommendedUrine: start time
udstempString2RecommendedWas urine temperature within expected range?Y;N;UY=Yes; N=No; U=Unknownchdpot
udssupString2RecommendedWas this urine collection supervised?Y;N;UY=Yes; N=No; U=Unknown
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessedoxycodone, uds_08, utox9
antideprIntegerRecommendedTricyclic Antidepressants
0=No; 1=Yes;2=Unclear or Equivocal; 3=Results not valid; 4=Not assessedtriantidepressants
weekFloatRecommendedWeek in level/study99=week 10-week 14
pregnanIntegerRecommendedpregnancy test
0=Negative; 1=Positive; 2=Test not conducted; -7=Refused; 9=NA;3=Not pregnant (per pregnancy test); 4=Not pregnant (has not reached menarche); 5=Pregnancy suspected, but not confirmedpregres, uds_pregnancy, urine_preg_results, urine_preg_results.
alcohol_levelFloatRecommendedAlcohol level0::1.00; .02; .04; .06; .08; .30bloodalcoholresult
bsimoFloatRecommendedMonths from Time 0 to assessmentmonfol
version_formString100RecommendedForm used/assessment nameform
propoxypheneIntegerRecommendedPropoxyphene (PPX)
1=Positive; 0=Negative
timeptIntegerRecommendedTime Point888 = not applicable; 999 = missingtimepoint
bloodalcoholIntegerRecommendedBlood Alcohol Concentration Test [1 = Performed]0 :: 10=Not Performed; 1=Performed
urinedrugscreenIntegerRecommendedUrine Drug Screen [1 = Performed]:0 :: 10=Not Performed; 1=Performedutox_healthy
urinedrugotherIntegerRecommendedDrug: Other [1 = Positive]0;1;90=Negative; 1=Positive; 9=Did not perform
urinedrugother_otherString100RecommendedDrug: Other (Value)
utox1IntegerRecommendedPhencyclidine test1;21= Positive; 2= Negative
utox8IntegerRecommendedEthanol test1;21= Positive; 2= Negative
urine_preg_healthyIntegerRecommendedWas Urine pregnancy test collected1::31= Yes; 2= No; 3= N/A Male
pregdtmString25RecommendedDate and time of Pregnancy Testpregd
ureadtmString25RecommendedDate and time of Urea Breath Testuread
hpyrsIntegerRecommendedH. Pylori Urea Breath Test Result
1=Negative; 2=Positiveureares
phi1IntegerRecommendedType of interview1::51 = In person; 2 = Phone; 3 = Mail; 4 = SIG-O only; 5 = Carp onlyin_person
tox_2String100RecommendedCup Description
tox_3IntegerRecommendedValid volume0;11= Yes; 0= No
tox_4IntegerRecommendedValid temperature0;11= Yes; 0= No
tox_14String100RecommendedStick Description
tox_15IntegerRecommendedTox Screen Completed0;11= Yes; 0= No
tox_16IntegerRecommendedTox Screen Valid?0;11= Valid; 0= Invalid
tox_17IntegerRecommendedTox Screen Result0; 1; 81= positive; 0= negative; 8= Invalid
bloodalcoholresultFloatRecommendedBAC Test Results (mg/dl)0::1000mg/dl
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: drugscr01 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.