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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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Data Structures with shared data
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Intervention History



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/project
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYYRequired fieldAddate
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.ADagemos
interview_chrono_ageIntegerRecommendedInterview Chronological Age0 :: 1200
interview_adj_ageIntegerRecommendedInterview Adjusted Age0 :: 1200
genderString20RequiredSex of the subjectM;FM = Male; F = FemaleSEX
comments_miscString4,000RecommendedMiscellaneous comments on study, interview, methodology relevant to this form datacmsl_comments
Mother;Father;Both; Child; Other; Parent
ihtypeString75Recommendedtype of interventionNone; ABA/discrete trial/Lovaas/intensive early intervention; Occupational therapy; Physical therapy; Speech therapy; Counseling/psychological services for child; Play therapy; Music therapy; Auditory integration training; TEACCH; Developmental play therapy (Hanen, RDI); Social skills training; Special education; Parent-child socialization/skill building support; Recreational sports for child; Typical class; Home program (not ABA); Biomedical/Nutritional; Parenting class/seminar; Counseling/psychological services for parent; Parent-child recreation
ihproviderString50Recommendedname of school/service provider
ihbeginDateRecommendeddate began
ihendDateRecommendeddate ended (today's date if still in progress)
ihhrpwkIntegerRecommendedhour/Week or Hours/event or dose
ihgrpindString20Recommendedgroup or individualgroup;individual
ihclassadIntegerRecommended# of adults in class
ihclasschIntegerRecommended# of child in class
ihbkgrdString50Recommendedprovider background (S/P/U)specialist;paraprofessional;untrained
ihbreaksIntegerRecommendedbreaks (length of weeks)
ihintensityIntegerRecommendedintensity (total hours of equivalent individual intervention)
siteString100RecommendedSiteStudy Site
weekFloatRecommendedWeek in level/study99=week 10-week 14
othmed0aIntegerRecommendedDid the patient take any medications0;10 = No; 1 = Yestakes_medication_n
medication_notesString1,000Recommendednotes or observations regarding medicationmedications
wk0FloatRecommendedNumber of times medication was given starting at Interview Date
therapy_nIntegerRecommendedsubject in therapy0;10=no; 1=yes
tl_social_skills_groupFloatRecommendedTotal hours of social skills group therapy completed starting at Interview Datetherapy_log_a_tla_w0_social_skills_group
tl_social_toriesFloatRecommendedTotal hours of Consistent Use of Social Stories therapy completed starting at Interview Datetherapy_log_a_tla_w0_consistent_use_social_tories
tl_skills_therapyFloatRecommendedTotal hours of Individual Social Skills therapy completed starting at Interview Datetherapy_log_a_tla_w0_individual_social_skills_therapy
tl_other_socialFloatRecommendedTotal hours of Other Social Skills therapy completed starting at Interview Datetherapy_log_b_tlb_w0_other_social
other_social_specifyString500RecommendedOther Social therapy specify
tl_cbtFloatRecommendedTotal hours of Cognitive Behavioral therapy completed starting at Interview Datetherapy_log_c_tlc_w0_cognitive_behavioral_therapy
tl_supportive_therapyFloatRecommendedTotal hours of Supportive therapy completed starting at Interview Datetherapy_log_c_tlc_w0_supportive_therapy
tl_abaFloatRecommendedTotal hours of Applied Behavior therapy completed starting at Interview Datetherapy_log_c_tlc_w0_applied_behavior_analysis
tl_individual_differencesFloatRecommendedTotal hours of Developmental Individual Differences therapy completed starting at Interview Datetherapy_log_c_tlc_w0_developmental_individual_differences
tl_teacch_herapyFloatRecommendedTotal hours of TEACCH therapy completed starting at Interview Datetherapy_log_c_tlc_w0_teacch_herapy
tl_denver_modelFloatRecommendedTotal hours of Early Start Denver Model therapy completed starting at Interview Datetherapy_log_c_tlc_w0_early_start_denver_model
tl_response_therapyFloatRecommendedTotal hours of Pivital Response therapy completed starting at Interview Datetherapy_log_c_tlc_w0_pivotal_response_therapy
tl_parent_trainingFloatRecommendedTotal hours of Parent Training completed starting at Interview Datetherapy_log_d_tld_w0_parent_training
eitng_spString100RecommendedParent training. Please describe:parent_training_specify
tl_physical_therapyFloatRecommendedTotal hours of Physical Therapy completed starting at Interview Datetherapy_log_e_tle_w0_physical_therapy
tl_language_therapyFloatRecommendedTotal hours of Speech Language Therapy completed starting at Interview Datetherapy_log_e_tle_w0_speech_language_therapy
tl_communicationFloatRecommendedTotal hours of Picture Exchange Communication completed starting at Interview Datetherapy_log_e_tle_w0_picture_exchange_communication
tl_occupational_therapyFloatRecommendedTotal hours of Occupational Therapy completed starting at Interview Datetherapy_log_e_tle_w0_occupational_therapy
tl_integration_therapyFloatRecommendedTotal hours of Sensory Integration Therapy completed starting at Interview Datetherapy_log_e_tle_w0_sensory_integration_therapy
tl_animal_therapyFloatRecommendedTotal hours of Equine/Other Animal Therapy completed starting at Interview Datetherapy_log_e_tle_w0_equine_other_animal_therapy
tl_music_therapyFloatRecommendedTotal hours of Music Therapy completed starting at Interview Datetherapy_log_e_tle_w0_music_therapy
tl_art_therapyFloatRecommendedTotal hours of Art Therapy completed starting at Interview Datetherapy_log_e_tle_w0_art_therapy
other_therapy_yesIntegerRecommendedother therapy0;10=no; 1=yes
tl_other_therapyFloatRecommendedTotal hours of Other Therapy completed starting at Interview Datetherapy_log_h_tlh_w0_other_therapy
other_typeString50RecommendedOther. Specify type of therapyother_therapy_specify
special_diet_yesIntegerRecommendedSpecial diet0;10=no; 1=yes
tl_special_dietFloatRecommendedTotal hours of Special Diet completed starting at Interview Datetherapy_log_k_tlk_w0_special_diet
specialdiet_current_descString1,000RecommendedSpecial diet - Describespecial_diet_specify
commentsString4,000RecommendedComments about assessmenttherapy_log_comments
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: intervention_hx01 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.