NDA Help Center

Login Dialog

Frequently Asked Questions


NDA Help Center

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



Reset Password

NDA provides a single access to de-identified autism research data. For permission to download data, you will need an NDA account with approved access to NDA or a connected repository (AGRE, IAN, or the ATP). For NDA access, you need to be a research investigator sponsored by an NIH recognized institution with federal wide assurance. See Request Access for more information.

Warning Notice

This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

Update Password

You have logged in with a temporary password. Please update your password. Passwords must contain 8 or more characters and must contain at least 3 of the following types of characters:

  • Uppercase
  • Lowercase
  • Numbers
  • Special Characters limited to: %,_,!,@,#,$,-,%,&,+,=,),(,*,^,:,;

Subscribe to our mailing list

Mailing List(s)
Email Format

You are now leaving the NIMH Data Archive (NDA) web site to go to:

Click on the address above if the page does not change within 10 seconds.


NDA is not responsible for the content of this external site and does not monitor other web sites for accuracy.

Accept Terms
Filter Cart
No filters selected
Value Range
Data Structures with shared data
No filters have been selected
Switch User

EEG Subject

526 Shared Subjects

Basic information about a study subject related to an EEG/EGG experiment including demographics, pedigree, and diagnosis/phenotype
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_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.
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY Required field
sex String 20 Required Sex of the subject M;F M = Male; F = Female gender
Query age_in_years Float Recommended Age in Years
Query height_met Float Recommended Height - Metric Unit
Query weight_met Float Recommended Weight - Metric Unit
Query head_circum Float Recommended Head Circumference (in cm) -1 = Not known
Query tsmfemale Integer Recommended TSM Female development stage 1::5; 9; 9998; 9999 1 = Prepubertal. No breast tissue; 2 = Areolar enlargement with breast bud; 3 = Enlargement of breast and areola as single mound; 4 = Projection of areola above breast as double mound; 5 = Adult. Papilla projects out of areola that is part of breast contour; 9 = Missing value; 9998 =subject skipped; 9999=not applicable--subject is not female
Query tsmmale Integer Recommended TSM Male development stage 1::5; 9; 9998; 9999 1 = Prepubertal; 2 = Testes enlarge. Scrotum larger, reddened and coarser; 3 = Penis enlarges, initially in length. Continued growth of testes and scrotum; 4 = Penis grows in length and breadth. Continued growth of testes and scrotum; 5 = Testes, scrotum and penis adult size; -9 = Missing value; 9998 =subject skipped; 9999=not applicable--subject is not male
Query tsmboth Integer Recommended TSM Pubic hair development stage 1::6; 9; 9998 1 = None; 2 = Few darker hairs along labia or at base of penis; 3 = Curly pigmented hairs across pubes; 4 = Small adult configuration; 5 = Adult configuration with spread onto inner thighs; 6 = Adult configuration with spread to linea alba; -9 = Missing value; 9998=subject skipped
Query tanneravg Float Recommended average of Tanner_PH and Tanner_BG
sleep_bt String 50 Recommended Child's bedtime
risetime String 25 Recommended self reported weekday rise time
Query tibmin Float Recommended time in bed in minutes calculated from Bedtime and Risetime
Query bt_frac Float Recommended self reported weekday bedtime converted to fraction of 24 hour day. (Note if after midnight the fraction is greater than 1)
Query rt_frac Float Recommended time in bed as fraction of 24 hour day
Query epworth Float Recommended Epworth sleepiness score
Query cdi_total Float Recommended child depression inventory total score 999 =NA/Missing
Query cdi_a Float Recommended components of the CDI score
Query cdi_b Integer Recommended components of the CDI score
Query cdi_c Integer Recommended components of the CDI score
Query cdi_d Integer Recommended components of the CDI score
Query cdi_e Integer Recommended components of the CDI score
Query current_medication String 300 Recommended subject's current medications
Query site String 101 Recommended Site Study Site
Query study String 100 Recommended Study
Query week Float Recommended Week in level/study 99=week 10-week 14
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.