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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.

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Mild Traumatic Brain Injury Screening



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 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
mtbi_screen_1IntegerRecommendedInitial GCS (1st available Glasgow Coma Scale Score)0::15for an mTBI, GCS must be between 13 and 15
mtbi_screen_2IntegerRecommendedBrain Imaging upon admission (Head CT or Brain MRI)1::31=Negative (no acute intracranial findings); 2=Positive (acute intracranial findings); 3=Not performed/Unknown
mtbi_screen_3IntegerRecommendedRetrograde Amnesia (RGA) "Tell me what happened right before [the accident, your fall, the injury]" If unclear: "Was there anything or any period of time right before you were hurt that you don't remember?" *RGA must be present RIGHT before injury and can extend backward in time for any duration1::41= No; 2= Yes (witnessed); 3= Suspected (not witnessed); 4= Unknown
mtbi_screen_6IntegerRecommendedRGA, hours?0::24
mtbi_screen_7FloatRecommendedRGA, minutes?0::60
mtbi_screen_8FloatRecommendedRGA Total Minutes0::9999
mtbi_screen_9IntegerRecommendedLoss of consciousness (LOC) "Were you knocked out? Did you lose consciousness?" If witnessed per EPIC OR subject report, select Witnessed, if subject believes LOC was present but was alone/unwitnessed, select Suspected.1::41= No; 2= Yes (witnessed); 3= Suspected (not witnessed); 4= Unknown
mtbi_screen_10IntegerRecommendedLOC, minutes?0::60
mtbi_screen_11IntegerRecommendedLOC, seconds?0::60
mtbi_screen_12IntegerRecommendedLOC Total Seconds0::9999
mtbi_screen_13IntegerRecommendedPost-traumatic amnesia (PTA) "Is there anything you don't remember after [the accident, your fall, you were injured]?" [If memory is fuzzy/came in and out:] "When did your memory become continuous?" For +LOC: full memory afer waking - no PTA; if some PTA after waking, record duration as time from injury to clearing of PTA -If unwitnessed period of time with no memory - record as unwitnessed LOC or unwitnessed PTA but not both, based on subject belief of their state1::41= No; 2= Yes (witnessed); 3= Suspected (not witnessed); 4= Unknown
mtbi_screen_14IntegerRecommendedPTA, hours?0::24
mtbi_screen_15IntegerRecommendedPTA, minutes?0::60
mtbi_screen_16IntegerRecommendedPTA Total Minutes0::9999
mtbi_screen_17IntegerRecommendedHead trauma or acceleration / deceleration event "Did our head or face hit anything / Were you hit in the head or face?" If no head trauma and MVC or similar mechanism: "Was your head suddenly jolted?" *If ANY contact with head/face, select Struck by/Against instead of other options.0::20= None; 1= Struck by/against (contact with head /face); 2= Whiplash (forceful jolt to head without contact)
mtbi_screen_18IntegerRecommendedAltered Mental Status (AMS) self-report READ VERBATIM: "Right after you [were injured/woke up], did you feel confused, dazed, stunned, see stars or like you got your bell rung?0::1; 880= No; 1= Yes; 88=Other
mtbi_screen_19String15RecommendedIf yes, check what was endorssed by subject:1=Confused; 2=Dazed; 3=Stunned; 4=Saw stars; 5=Felt like "bell rung"; 6=other
mtbi_screen_21String30RecommendedSymptoms "Right after the accident or soon after, tell me if you had any of these symptoms.1= Headache; 2=Nausea; 3= Vomiting; 4=Dizziness; 5= Fatigue; 6= Difficulty Sleeping; 7= Drowsiness; 8= Sensitivity to Light; 9= Sensitivity to Noise; 10= Blurred Vision; 11= Memory Difficulties; 12= Difficulty Concentrating; 13= Balance Problems
mtbi_screen_22IntegerRecommendedAltered Mental Status - Other Was any information gathered elsewhere in the interview that could suggest acute mental status changes/AMS?0::10= No; 1= Yes
mtbi_screen_23String500RecommendedSymptoms. If Other, list:
mtbi_screen_25IntegerRecommendedParticipant Group: Subject meets criteria for all mTBI if ALL of the following are present: (1) Struck by/against or whiplash event (2) Altered mental status (reported OR LOC < 30 minutes OR PTA < 24 hours) (3) One or more subjective symptoms (4) Initial Glasgow Coma Scale (GCS) = 13-15 Participant is eligible for which group?1::31= mTBI Group; 1= Control Group; 3= Other
comments_miscString4,000RecommendedMiscellaneous comments on study, interview, methodology relevant to this form datamtbi_screen_24
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: mtbi01 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.