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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

Description
Value Range
Notes
Data Structures with shared data
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Lab Results

lab

01

Lab Results

Download Definition as
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Element NameData TypeSizeRequiredDescriptionValue RangeNotesAliases
subjectkeyGUIDRequiredThe NDAR Global Unique Identifier (GUID) for research subjectNDAR*
src_subject_idString20RequiredSubject ID how it's defined in lab/projectCATIEID
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging was completed. MM/DD/YYYYRequired field
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.
genderString20RequiredSex of the subjectM;FM = Male; F = Female
visitidIntegerRecommendedMetaTrial Visit IDSystem variable: unique code for each type of visit -use to merge files
visitString50RecommendedVisit nameCharacter description of each type of visit
truncvisIntegerRecommendedTruncated Visit NumberCreated variable: provides a numeric visit number for all visits, including unscheduled and end of phase
phase_ctString20RecommendedCurrent Phase. Phase patient was in at the time of the assessment Phase 4 refers to the follow-up phase.Pre-Rand; Phase 1/1A; Phase 2; Phase 3; Phase 4; Phase 1B; Open-Choice Phase; Screening; Phase 1phase
colldyIntegerRecommendedCollection DayNumber of days from study baseline to date of sample collectionCOLLECDY
testnameString50RecommendedLaboratory Test Name
repeatIntegerRecommendedFlag for Repeat of Lab Test0;10=No;1=Yes, missing otherwise
testgrpString50RecommendedLaboratory Test Group
testcodeString10RecommendedLaboratory Test Code
collectmString20RecommendedCollection Time
rstatusString1RecommendedRecord StatusX=result for this lab test not available; 0 or missing = result for this lab test is availalbe
resultypString1RecommendedType Of ResultN;TN=numeric, T=text
resultString100RecommendedReported Result
unitsString50RecommendedReported Unit
hinormString50RecommendedNormal Range Reported High Value
lonormString50RecommendedNormal Range Reported Low Value
cvresultString50RecommendedResult in Conventional Units
resnFloatRecommendedNumeric ResultTakes the value of CVRESULT. If CVRESULT has a > or < sign, then the sign is removed before creating RESN.
cvunitsString10RecommendedConventional Units
cvhinormFloatRecommendedNormal Range Conventional High Value
cvlonormFloatRecommendedNormal Range Conventional Low Value-999=negative; 999=normal
alertflgString2RecommendedAlert FlagH; TH; PH; L;PL; TLH=High;TH=High, telephone the site;PH=panic high; L=Low; TL=Low, telephone the site; PL=panic low
base1fIntegerRecommendedPhase 1/1A Baseline Flag1=Yes for all records meeting this criteria
last1fIntegerRecommendedPhase 1/1A Last Value Flag1=Yes for all records meeting this criteria
baseval1FloatRecommendedPhase 1/1A Baseline Valuevalue for each particular lab test at phase-specific baseline; retained across all records for that lab test.
chgval1FloatRecommendedPhase 1/1A Change from BaselinePhase-specific change (within each phase, change is calculated from that phase's baseline measurement)
base1bfIntegerRecommendedPhase 1B Baseline Flag1=Yes for all records meeting this criteria
last1bfIntegerRecommendedPhase 1B Last Value Flag1=Yes for all records meeting this criteria
basval1bFloatRecommendedPhase 1B Baseline Valuevalue for each particular lab test at phase-specific baseline; retained across all records for that lab test.
chgval1bFloatRecommendedPhase 1B Change from BaselinePhase-specific change (within each phase, change is calculated from that phase's baseline measurement)
base2fIntegerRecommendedPhase 2 Baseline Flag1=Yes for all records meeting this criteria
last2fIntegerRecommendedPhase 2 Last Value Flag1=Yes for all records meeting this criteria
baseval2FloatRecommendedPhase 2 Baseline Valuevalue for each particular lab test at phase-specific baseline; retained across all records for that lab test.
chgval2FloatRecommendedPhase 2 Change from BaselinePhase-specific change (within each phase, change is calculated from that phase's baseline measurement)
base3fIntegerRecommendedPhase 3 Baseline Flag1=Yes for all records meeting this criteria
last3fIntegerRecommendedPhase 3 Last Value Flag1=Yes for all records meeting this criteria
baseval3FloatRecommendedPhase 3 Baseline Valuevalue for each particular lab test at phase-specific baseline; retained across all records for that lab test.
chgval3FloatRecommendedPhase 3 Change from BaselinePhase-specific change (within each phase, change is calculated from that phase's baseline measurement)
lmealtmString10RecommendedTime of last meal
ldosetmString10RecommendedTime of last dose
ldosedyIntegerRecommendedDay of last doseNumber of days from study baseline to date of last dose
lmealdyIntegerRecommendedDay of last mealNumber of days from study baseline to date of last meal
visdayIntegerRecommendedNumber of days from study baseline to date of visit
accessnoString25RecommendedAccession NumberUniquely identifies each blood draw
visnumFloatRecommendedNumeric Visit Number-1.5 = Pre-Screening; -1 = Screening; 0 = Baseline; ## = Visit ## (from 1 to 10); Whole numbers = standard monthly visits; #.001 - #.009 = Unscheduled; #.1 = End of Phase 1; #.2 = End of Phase 2; #.3 = End of Phase 3; #.4 = End of Open Choice Phase; #.5 = End of Study; #.6 = Genetic Analysis; 1000=all visits
chgval2sFloatRecommendedPhase 2 Change from Study BaselineChange from Phase 1 baseline to Phase 2
chgval3sFloatRecommendedPhase 3 Change from Study BaselineChange from Phase 1 baseline to Phase 3
baseocfIntegerRecommendedPhase OC Baseline Flag11=Yes for all records meeting this criteria
basevlocFloatRecommendedPhase OC Baseline Valuevalue for each particular lab test at phase-specific baseline; retained across all records for that lab test.
chgvalocFloatRecommendedPhase OC Change from BaselinePhase-specific change (within each phase, change is calculated from that phase's baseline measurement)
chgvalosFloatRecommendedPhase OC Change from Study BaselineChange from Phase 1 baseline to Open Choice Phase
lastocfIntegerRecommendedPhase OC Last Value Flag11=Yes for all records meeting this criteria
avnumcigIntegerRecommendedAverage Number of Cigarettes
ls_resultIntegerRecommendedResult1;2;31=Normal;2=Abnormal-Not clinically significant;3=Abnormal-Clinically significant
linenoIntegerRecommendedLine number (lines per participant)0::150
iecsigIntegerRecommendedInvestigator signature on form.0;10=No; 1= Yes
siteString100RecommendedSiteStudy Site
days_baselineIntegerRecommendedDays since baseline
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: lab01 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.