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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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Selected Filters
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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

Value Range
Data Structures with shared data
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Diet Log



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_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.
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging was completed. MM/DD/YYYYRequired field
genderString20RequiredSex of the subjectM;FM = Male; F = Female
diet_changeString15RecommendedHave there been any changes in diet since the subjects last visitYes; No; Not Applicablep7902dietlogdietchanges
allergic_reactionString5RecommendedFood allergies clear allergic reaction not suspected based on family historyYes; Nop7902dietlogfoodallergies
allergic_reaction_specString100RecommendedPlease specify Food allergies clear allergic reaction not suspected based on family historyp7902dietlogfoodallergiesspeci
foodaversionString5RecommendedFood aversion temperature texture colorYes; Nop7902dietlogfoodaversion
foodaversionspecifString150RecommendedPlease specify Food aversion temperature texture colorp7902dietlogfoodaversionspecif
highcalor_blendedorpString25RecommendedDiet Log High Calor texture Blended or pureedChopped fine; Blended or pureedp7902dietloghighcalor_blendedorp
highcalor_bygastrostString25RecommendedDiet Log High Calor ingestBy mouth; By gastrostomy, nasogastric, or jejunostomy tubep7902dietloghighcalor_bygastrost
highcaloriefoodString10RecommendedHigh calorie table food contents different from rest of familyYes; Nop7902dietloghighcaloriefood
mealtimedurationIntegerRecommendedAverage mealtime duration in minutesp7902dietlogmealtimeduration
nutrition_bygastrostString50RecommendedDiet Log Nutrition ingestBy mouth; By gastrostomy, nasogastric, or jejunostomy tubep7902dietlognutrition_bygastrost
nutritionalsupplemString5RecommendedNutritional supplementation eg Pediasure Boost Carnation Instant BreakfastYes; Nop7902dietlognutritionalsupplem
nutritionalsupplem2IntegerRecommendedSpecific Type If yes list type volume and routes of administration mark all that apply 3 Nutritional supplementation eg Pediasure Boost Carnation Instant Breakfastp7902dietlognutritionalsupplem2
nutritionalsupplem3IntegerRecommendedSpecific volume If yes list type volume and routes of administration mark all that apply 3 Nutritional supplementation eg Pediasure Boost Carnation Instant Breakfastp7902dietlognutritionalsupplem3
regtablef_blendedorpString50RecommendedDiet Log Reg textureChopped fine; Blended or pureedp7902dietlogregtablef_blendedorp
regtablef_bygastrostString50RecommendedDiet Log Reg ingestBy mouth; By gastrostomy, nasogastric, or jejunostomy tubep7902dietlogregtablef_bygastrost
regtablefoodString5Recommended1 Regular table food same contents as familyYes; Nop7902dietlogregtablefood
specialdi_bygastrostString50RecommendedDiet Log Special Diet ingestBy mouth; By gastrostomy, nasogastric, or jejunostomy tubep7902dietlogspecialdi_bygastrost
specialdi_caseinfreeString20RecommendedDiet Log Special Diet typeGluten-free; Ketogenic; Casein free; N/Ap7902dietlogspecialdi_caseinfree
eit_dayprogramIntegerRecommendedEarly Intervention Type: Day Program0;10 = unchecked box; 1 = checked boxspecialdietother
dl_daifrIntegerRecommendedDiet Log dairy free0;10=unchecked; 1=checked boxp7902dietlogspecialdi_dairyfree
dl_otherIntegerRecommendedDiet Log other0;10=unchecked; 1=checked boxp7902dietlogspecialdi_other
dl_siyifrIntegerRecommendedDiet Log soy free0;10=unchecked; 1=checked boxp7902dietlogspecialdi_soyfree
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: diet01 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.