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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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Clinical Trial: Personal Data

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Clinical Trial: Personal Data
Clinical Assessments
View Change History
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
contact String 1,000 Required Contact
das1ms String 200 Required Marital status
group_tr Integer Required treatment or control group 1::3 1=neurocognitive rehab; 2=Control therapy; 3=control no treatment group
procy Integer Required procyclidine levels at time 1
in_trial Integer Required trial 0::2 0= not in completed trial; 1=in trial; 2=some time 2 data otherwise stolen
include Integer Required in the trial 0::2 0=dropped out; 1=in trial but data stolen; 2=in trial no data stolen
include2 Integer Required inclusion in trial 0;1 0=no data available; 1=included
educat Float Required Number of years in formal education 999=Unknown/Missing
startdat Integer Required Start date of therapy
enddat Integer Required Start date of therapy
folldat Integer Required Follow up dates ( 6 months )
clozapin Integer Required Clozapine dose and other atypical dose
drugs Integer Required daily dose 1::3 1=typical antipsychotics; 2=atypical; 3=clozapine
medic Integer Required medications
clchan Integer Required Clinical change between time 1 and time 2 eg. relapse- admission, major drug changes or change in diagnosis. 0::4 0=No significant change; 1=Relapse leading to hospital admission; 2=Major change in medic' eg. Clozaril trial or great increases; 3=Change in diagnosis; 4=Major Life event
ntcare Integer Required Personal details. Q.5a. Present night care 1::9 1=Hospital/hospital hostel; 2=Hostel (as part of psychiatry service); 3=Group home; 4=none; 5=Independent council property; 6=With family; 7=Other; 9=Don't know
daycare Integer Required Personal details: Q5b. present day care 1::6;9 1=hospital or hospital/hostel as inpatient; 2=Day hospital; 3=day centre; 4=sheltered work; 5=group home; 6=none; 9=don't know
superv Integer Required Personal details: Q5c. other supervision 1::3;9 1=out-patients; 2=other intermittent supervision e.g. social worker; 3=both out-patients and other intermittent supervision; 9=none known
lengtha Integer Required Personal details: length of stay in present night care in months
lengthb Integer Required Personal details: Length of stay in present day care in months
lengthc Integer Required Personal details: length of time receiving current extra supervision in months
admiss Integer Required Personal details. Time since first admission 1::4 1=1 year; 2=1 - 5 years; 3=5 - 10 years; 4=more than 10 years
admres Integer Required Personal details. Time since first admission to any residential service 1::4 1=1 year; 2=1 - 5 years; 3=5 - 10 years; 4=more than 10 years
country Integer Required Personal details. Country of origin 1::6 1=UK; 2=West Indies; 3=India and Asia; 4=Africa; 5=Other European; 6=Other
presacc Integer Required Personal details. Present accommodation 1::5 1=Living with spouse/cohabitant; 2=Living with parent or other relative; 3=Living alone or sharing a flat/house; 4=Living alone in lodgings (where some meals/laundry are prov); 5=supervised hostel or recepion centre
peakach Integer Required Personal details.Peak achievement 1::4 1=Living with spouse/cohab or living alone or sharing flat/house; 2=Living alone in lodgings (with some meals/laundry provided); 3=Supervised hostel or reception centre; 4=never lived independently
kids Integer Required Personal details. Number of biological children
peakjob Integer Required Personal details.peak job status 1::5 1=none (includes house-wife with no domestic responsibilities); 2=unskilled; 3=semi-skilled; 4=skilled; 5=housewife with domestic responsibility (e.g. young children)
lengthem Integer Required Personal details. length of previous employment 1::4 1=none; 2=1 job less than 3 months; 3=1+jobs less than 3 months; 4=1+ jobs more than 3 months
improve_a Integer Required amount of improvement
improve_cat Integer Required categorical variable of improvment at
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.