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Frequently Asked Questions


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Filter Cart

The Filter Cart provides a powerful way to query and access data for which you may be interested.  

A few points related to the filter cart are important to understand with the NDA Query/Filter implementation: 

First, the filter cart is populated asyncronously.  So, when you run a query, it may take a moment to populate but this will happen in the background so you can define other queries during this time.  

When you are adding your first filter, all data associated with your query will be added to the filter cart (whether it be a collection, a concept, a study, a data structure/elment or subjects). Not all data structures or collections will necessarily be displayed.  For example, if you select the NDA imaging structure image03, and further restrict that query to scan_type fMRI, only fMRI images will appear and only the image03 structure will be shown.  To see other data structures, select "Find All Subject Data" which will query all data for those subjects. When a secord or third filter is applied, an AND condition is used.  A subject must exist in all filters.  If the subject does not appear in any one filter, that subjects data will not be included in your filter cart. If that happens, clear your filter cart, and start over.  

It is best to package more data than you need and access those data using other tools, independent of the NDA (e.g. miNDAR snapshot), to limit the data selected.  If you have any questions on data access, are interested in using avaialble web services, or need help accessing data, please contact us for assistance.  

Frequently Asked Questions



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Data Structures with shared data
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Assays Form

918 Shared Subjects

Clinical Assessments
Phys Exam
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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
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 M = Male; F = Female gender
Query sample_description String 3,500 Required Sample description: tissue type, i.e. blood, saliva, brain etc. whole blood; saliva; brain; urine; serum; plasma; CSF; IPS; Fibroblast; Neuronal Progenitor; skin biopsy; temporal cortex; lymphoblastoid cell line; unknown; semen; frontal cortex; parietal cortex; basal ganglia; Placenta; hair; occipital visual cortex; cerebellum; spleen; stool; muscle; kidney; liver; heart; cord blood
reag String 50 Required Substance/reagent of interest
Query cortisolmeasure_1 Float Recommended Substance Measure 1 alphaamylasemeasure_1
Query cortisolmeasure_2 Float Recommended Substance Measure 2 alphaamylasemeasure_2
Query cortisolmeasure_3 Float Recommended Substance Measure 3 alphaamylasemeasure_3
Query cortisolmeasure_4 Float Recommended Substance Measure 4 alphaamylasemeasure_4
Query cortisolmeasure_5 Float Recommended Substance Measure 5 alphaamylasemeasure_5
Query cortisolmeasure_6 Float Recommended Substance Measure 6 alphaamylasemeasure_6
Query cortisolmeasure_7 Float Recommended Substance Measure 7 alphaamylasemeasure_7
Query cortisolmeasure_8 Float Recommended Substance Measure 8 alphaamylasemeasure_8
assayid_1 String 20 Recommended Assay ID 1
assayid_2 String 20 Recommended Assay ID 2
assayid_3 String 20 Recommended Assay ID 3
assayid_4 String 20 Recommended Assay ID 4
assayid_5 String 20 Recommended Assay ID 5
assayid_6 String 20 Recommended Assay ID 6
assayid_7 String 20 Recommended Assay ID 7
assayid_8 String 20 Recommended Assay ID 8
Query correlated_value_1 Float Recommended Correlated Value 1 cort1_value_scan1, cort1_value_scan2
Query correlated_value_2 Float Recommended Correlated Value 2 cort2_value_scan1, cort2_value_scan2
Query correlated_value_3 Float Recommended Correlated Value 3 cort3_value_scan1, cort3_value_scan2
Query correlated_value_4 Float Recommended Correlated Value 4 cort4_value_scan1, cort4_value_scan2
Query correlated_value_5 Float Recommended Correlated Value 5 cort5_value_scan1, cort5_value_scan2
Query correlated_value_6 Float Recommended Correlated Value 6 cort6_value_scan1, cort6_value_scan2
Query correlated_value_7 Float Recommended Correlated Value 7 cort7_value_scan1, cort7_value_scan2
Query correlated_value_8 Float Recommended Correlated Value 8
time_of_measure_1 String 25 Recommended Date/Time of Measure 1 cort1_time_scan1, cort1_time_scan2
time_of_measure_2 String 25 Recommended Date/Time of Measure 2 cort2_time_scan1, cort2_time_scan2
time_of_measure_3 String 25 Recommended Date/Time of Measure 3 cort3_time_scan1, cort3_time_scan2
time_of_measure_4 String 25 Recommended Date/Time of Measure 4 cort4_time_scan1, cort4_time_scan2
time_of_measure_5 String 25 Recommended Date/Time of Measure 5 cort5_time_scan1, cort5_time_scan2
time_of_measure_6 String 25 Recommended Date/Time of Measure 6 cort6_time_scan1, cort6_time_scan2
time_of_measure_7 String 25 Recommended Date/Time of Measure 7 cort7_time_scan1, cort7_time_scan2
time_of_measure_8 String 25 Recommended Date/Time of Measure 8
Query cortisolmeasure_9 Float Recommended Substance Measure 9 alphaamylasemeasure_9
Query cortisolmeasure_10 Float Recommended Substance Measure 10 alphaamylasemeasure_10
assayid_9 String 20 Recommended Assay ID 9
assayid_10 String 20 Recommended Assay ID 10
Query correlated_value_9 Float Recommended Correlated Value 9
Query correlated_value_10 Float Recommended Correlated Value 10
time_of_measure_9 String 25 Recommended Date/Time of Measure 9
time_of_measure_10 String 25 Recommended Date/Time of Measure 10
Query trial Integer Recommended Trial number 0::400; -777; -999 1 = first; 2= second; 3=third; 4=fourth; 5=fifth; 6=sixth; etc; -777=NA, -999=missing
Query log_measure1 Float Recommended Log-transformed value
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.