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Filter Cart

Viewable at the top right of NDA pages, the Filter Cart is a temporary holder for filters and data they select. Filters are added to the Workspace first, before being submitted to The Filter Cart. Data selected by filters in the Filter Cart can be added to a Data Package or an NDA Study from the Data Packaging Page, by clicking the 'Create Data Package / Add Data to Study' button.

The filter cart supports combining multiple filters together, and depending on filter type will use "AND" or "OR"  when combining filters.

Multiple selections from the same filter type will result in those selections being applied with an ‘OR’ condition. For example, if you add an NDA Collection Filter with selections for both collections 2112 and 2563 to an empty Workspace, the subjects from NDA Collection 2112 ‘OR’ NDA Collection 2563 will be added to your Workspace even if a subject is in both NDA Collections. You can then add other NDA Collections to your Workspace which further extends the ‘OR’ condition.

If a different filter type is added to your Workspace, or a filter has already been submitted to the Filter Cart, the operation then performs a logical ‘AND’ operation. This means that given the subjects returned from the first filter, only those subjects that matched the first filter are returned by the second filter (i.e., subjects that satisfied both filters). Note that only the subjects specific to your filter will be added to your Filter Cart and only on data shared with the research community. Other data for those same subjects may exist (i.e., within another NDA Collection, associated with a data structure that was not requested in the query, etc.). So, users should select ‘Find all Subjects Data’ to identify all data for those specific subjects. 

Additional Tips:

  • You may query the data without an account, but to gain access you will need to create an NDA user account and apply for access.  Most data access requires that you or your lab are sponsored by an NIH recognized institution with Federal Wide Assurance (FWA).  Without access, you will not be able to obtain individual-level data. 

    Once you have selected data of interest you can:
  • Create a data package - This allows you to specify format for access/download
  • Assign to Study Cohort - Associate the data to an NDA Study allowing for a DOI to be generated and the data to be linked directly to a finding, publication, or data release. 
  • Find All Subject Data - Depending on filter types being used, not all data associated with a subject will be selected.  Data may be restricted by data structure, NDA Collection, or outcome variables (e.g., NDA Study). ‘Find All Data’ expands the fliter criteria by replacing all filters in your Filter Cart with a single Query by GUID filter for all subjects selected by those filters.

    Please Note:
  • When running a query, it may take a moment to populate the Filter Cart. Queries happen in the background so you can define other queries during this time. 
  • When you add your first filter, all data associated with your query will be added to the Filter Cart (e.g., a Concept, an NDA Collection, a Data Structure/Element, etc.). As you add additional filters, they will also display in the Filter Cart. Only the name of filter will be shown in the Filter Cart, not the underlying structures. 
  • Information about the contents of the Filter Cart can be seen by clicking "Edit”.
  • Once your results appear in the Filter Cart, you can create a data package or assign subjects to a study by selecting the 'Package/Assign to Study' option. You can also 'Edit' or 'Clear' filters.

Frequently Asked Questions

  • The Filter Cart currently employs basic AND/OR Boolean logic. A single filter may contain multiple selections for that filter type, e.g., a single NDA Study filter might contain NDA Study 1 and NDA Study 2. A subject that is in EITHER 1 OR 2 will be returned.  Adding multiple filters to the cart, regardless of type, will AND the result of each filter.  If NDA Study 1 and NDA Study 2 are added as individual filters, data for a subject will only be selected if the subject is included in  BOTH 1 AND 2.

  • Viewable at the top right of NDA pages, the Filter Cart is a temporary holder of data identified by the user, through querying or browsing, as being of some potential interest. The Filter Cart is where you send the data from your Workspace after it has been filtered.

  • After filters are added to the Filter Cart, users have options to ‘Create a Package’ for download, ‘Associate to Study Cohort’, or ‘Find All Subject Data’. Selecting ‘Find All Subject Data’ identifies and pulls all data for the subjects into the Filter Cart. Choosing ‘Create a Package’ allows users to package and name their query information for download. Choosing ‘Associate to Study Cohort’ gives users the opportunity to choose the Study Cohort they wish to associate this data.


  • Once your filter cart contains the subjects of interest, select Create Data Package/Assign to Data Study which will provide options for accessing item level data and/or assigning to a study.  

  • Once queries have been added to your workspace, the next step is to Submit the Filters in the workspace to the Filter Cart.  This process runs the queries selected, saving the results within a filter cart attached to your account.  

  • The Workspace within the General Query Tool is a holding area where you can review your pending filters prior to adding them to Filter Cart. Therefore, the first step in accessing data is to select one or more items and move it into the Workspace. 


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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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Household Demographic Information

321 Shared Subjects

Clinical Assessments
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Query Element Name Data Type Size Required Description Value Range Notes Aliases
subjectkey GUID Required The NDAR Global Unique Identifier (GUID) for research subject NDAR*
src_subject_id String 20 Required Subject ID how it's defined in lab/project randid
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY Required field
interview_age Integer Required Age in months at the time of the interview/test/sampling/imaging. 0 :: 1260 Age 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.
sex String 20 Required Sex of the subject M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported gender
Query visitday Integer Recommended day of visit dmg_visitdat_x, interval, studyday
Query study String 100 Recommended Study dmg_birthdat_x, studyid
Query visit String 60 Recommended Visit name dmg_studyid
Query completed Integer Recommended Checks if completed 0::3 0=No; 1=Yes; 2=Yes, lost; 3=Unverified dmg_interval, frmcomp
Query dmg_referral Integer Recommended referral source 1::11;99 1=School ; 2=Hospital - Pediatric Psychiatry ; 3=Hospital - Emergency Room ; 4=Hospital - Other Clinic; 5=Other Treatment Center; 6=Friend ; 7=Radio ; 8=Ad in Paper ; 9=Other ;10= poster/flyer; 11=Internet; 99=DK
Query refothers String 50 Recommended Referral source: specify dmg_otherref
Query race String 30 Recommended Race of study subject American Indian/Alaska Native; Asian; Hawaiian or Pacific Islander; Black or African American; White; More than one race; Unknown or not reported dmg_race
Query otherrace String 100 Recommended specify other race The following questions are about you or the child's family. dmg_othrrace
Query birthlocationsp String 50 Recommended Birth location specify dmg_brthplce
Query ustime String 100 Recommended How long you lived in US, years dmg_yrsinusa
Query dem_07 Integer Recommended Type of educational activity 1::17 1=Regular public school grade; 2=Regular private/parochial school grade 3=Regular public nursery; 4=Regular public kindergarten; 5=Regular private/parochial nursery; 6=Regular private/parochial kindergarten; 7=Special school for preschoolers with emotional/behavioral or learning problems; 8=Day Care; 9=Play group; 10=Pre-nursery; 11=Pre-kindergarten; 12=Not in school, not in play group, not in day care; 13=Special Class within regular school; 14=Special school for school-age children with emotional/behavioral or learning problems; 15=Other (Specify);16=Special school; 17=Home school dmg_school, eduplace
Query currgradelevel String 50 Recommended Current grade level dmg_curgrade, edulevel
Query ged2 Integer Recommended Type of school placement - Dropped out -working on GED; current 1;2 1=no; 2=yes dmg_ged
Query dmg_remedial Integer Recommended attends resource or remedial classes 0;1;8;9 0=No 1=Yes 8=NA - not in regular school 9=DK
Query religion String 100 Recommended Religion dmg_religion
Query dmg_curlvcir Integer Recommended child current living circumstances 1::8 1=Parental home (at least one parent) 2=Relatives (other than parents) 3=With (child's) boyfriend/girlfriend or spouse (includes common law arrangement) 4=With unrelated adults 5=Foster home 6=Group home 7=Institution 8=Other livarrg
Query dmg_yrscurlv Integer Recommended time in current living situation years
Query dmg_guardian String 30 Recommended child's guardian
Query dmg_guardage Integer Recommended guardian age
Query sum2_lang String 50 Recommended Dominant language dmg_langengl, language
Query dmg_q53 Integer Recommended current household composition
Query demo3 Integer Recommended Mother figure 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home dmg_q53a
Query demo4 Integer Recommended Father figure 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home dmg_q53b
Query dmg_q53c Integer Recommended stepmother 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53d Integer Recommended stepfather 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53e Integer Recommended common law or cohabiting male 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53f Integer Recommended common law or cohabiting female 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53g Integer Recommended foster mother 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53h Integer Recommended foster father 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53i Integer Recommended comon law spouse of child 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53j Integer Recommended biological grandmother 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53k Integer Recommended biological grandfather 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53l Integer Recommended aunt 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53m Integer Recommended uncle 0::9 0=none in home; 1= one in home; 2= two in home; 9=9 in home
Query dmg_q53n Integer Recommended number of related sibs 0::99 0 - 99
Query dmg_q53o Integer Recommended number of step siblings 0::99 0 - 99
Query dmg_q53p Integer Recommended number of other relatives (<18years) 0::99 0 - 99
Query dmg_q53q Integer Recommended number of other relatives (>18years) 0::99 0 - 99
Query dmg_q53r Integer Recommended number of unrelated children (<18years) 0::99 0 - 99
Query dmg_q53s Integer Recommended number of unrelated adults (>18years) 0::99 0 - 99
Query dmg_q53t Integer Recommended Total children in household (>18years) 0::99 0 - 99
Query dmg_q53u Integer Recommended Total children in household (<18years) 0::99 0 - 99
Query rooms Integer Recommended Number Rooms dmg_q53v
Query dmg_q54 Integer Recommended total number of full siblings 0::99 0 - 99
Query dmg_q55 Integer Recommended total number of half siblings 0::99 0 - 99
Query dmg_q57 Integer Recommended years parents were married to each other 0::99;88;99 0 - 99, 88 =NA, 99= DK
Query fh07 Integer Recommended 7. Subject adopted 0;1;9 dmg_adopted
Query dmg_adptyrs Integer Recommended age (years) at adoption
Query dmg_adptmths Integer Recommended age (months) at adoption
Query item43 Integer Recommended Placed in foster/residential care 1;2 1=no;2=yes dmg_fostcare
Query dmg_fctotal Integer Recommended total number of foster placements
Query dmg_fcfstage Integer Recommended child age at first placement (in years)
Query dmg_fctotyrs Integer Recommended total number of years in foster care
Query dmg_othrcare Integer Recommended child ever had other,informal placements 0;1;9 0 = No;1 = Yes;9 = DK;Between 0 And 1 Or 9 Or Is Null;Answer must be 0,1 or 9
Query dmg_octotal Integer Recommended total number of informal placements
Query dmg_ocfstage Integer Recommended child age at first placement (in years)
Query dmg_octotyrs Integer Recommended total number of years in informal care
Query demo60 Integer Recommended Annual household income before taxes, including income from all jobs, child support, public assistance, or Social Security payments. (include income from all working members of the household in item 2 who contribute financially) 1::10 1=less than $5,000; 2 = Less than $10,000; 3 = $10,001 to $20,000; 4 = $20,001 to $30,000; 5 = $30,001 to $40,000; 6 = $40,001 to $50,000; 7 = $50,001 to $60,000; 8 = $60,001 to $70,000; 9 = $70,001 to $80,000; 10 = $80,001 or more dmg_income, income
Query ci_enrolled Integer Recommended Participant enrolled 0;1 0=No; 1=Yes enrolled
Query site String 101 Recommended Site Study Site
dmg_curlvcir_spec String 25 Recommended current living circumstances specified
Query dem_07_spec String 30 Recommended Type of educational activity (Specified)
Query resp_ethnicity String 30 Recommended Respondent's ethnicity Hispanic or Latino;Not Hispanic or Latino;Unknown or not reported ethnicit, ethnicity
Query adults_household Integer Recommended Number adults in household numadult
Query children_household Integer Recommended Number children household numchild
Query sitedatasource_1 Integer Recommended Source of Data: Site 0;1; -888; -999 0=False; 1=True; -888=Not Applicable; -999=Missing; infosrcr
Query sitedatasource_phone Integer Recommended Source of Data: Telephone 0;1; -888; -999 0=False; 1=True; -888=Not Applicable; -999=Missing; infoscrct
Query sitedatasource_physician Integer Recommended Source of Data: Physician 0;1; -888; -999 0=False; 1=True; -888=Not Applicable; -999=Missing; infoscrp
Query das1ms String 200 Recommended Marital status marital
Query educate Integer Recommended years of education completed 1::8;-7 1=Less than seventh grade; 2=Seventh grade-ninth grade; 3=Partial high school; 4=High school diploma or GED; 5=Some college (at least one year); 6=Technical school or associates degree; 7=College diploma (Bachelor's degree); 8=Graduate or professional degree; -7=Refused education
Query emplsub Integer Recommended Subject's Employment 1::11 1=Employment full time for pay; 2=Employed part-time for pay (less than 30 hours/week); 3=Homemaker; 4= Full time student; 5= Part time student; 6=Temporary out of work; 7=Unemployed for more than 6 month; 8=Retired; 09=Receiving public assistance; 10=Disabled; 11= Other: employment
psysoc_214 String 160 Recommended Employment: Other1:
Query edutot Float Recommended Total years of education educationyears
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.