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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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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

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Data Structures with shared data
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Endicott Work Productivity Scale



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/projectid
interview_dateDateRequiredDate on which the interview/genetic test/sampling/imaging was completed. MM/DD/YYYYRequired fieldv10_ewps_date, v2_ewps_date
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.v10_ewps_age, v2_ewps_age
genderString20RequiredSex of the subjectM;FM = Male; F = Female
visdayIntegerRecommendedNumber of days from study baseline to date of visitdate
phaseIntegerRecommendedPhase9 =follow up
weekFloatRecommendedWeek in level/study99=week 10-week 14
siteString100RecommendedSiteStudy Sitesiteid
ewps_1IntegerRecommendedDo you receive pay or other money for any type of work?0;10 = No;1 = Yespay, v10_ewps_pay_otherwork, v2_ewps_pay_otherwork
ewps_2IntegerRecommendedDo you do volunteer work?0;10 = No;1 = Yesv10_ewps_volunteer, v2_ewps_volunteer, volunter
ewps_3IntegerRecommendedIf you do not receive money for your work and do not do volunteer work, please indicate why you do not;1::41 = I am physically ill;2 = I am too upset, depressed, or nervous;3 = I can't find work;4 = Other (please specify)notwork, v10_ewps_no_workvolunteer_why, v2_ewps_no_workvolunteer_why
ewps_4IntegerRecommendedI am self-employed.0;10 = No;1 = Yesselfemp, v10_ewps_selfemploy, v2_ewps_selfemploy
ewps_5IntegerRecommendedI work for someone else0;10 = No;1 = Yesv10_ewps_workforsomeone, v2_ewps_workforsomeone, workfor
ewps_6IntegerRecommendedI have a boss/supervisor.0;10 = No;1 = Yesboss, v10_ewps_boss, v2_ewps_boss
ewps_7IntegerRecommendedI have co-workers with whom I must work.0;10 = No;1 = Yescoworker, v10_ewps_coworkers, v2_ewps_coworkers
ewps_8IntegerRecommendedI supervise others at work0;10 = No;1 = Yessupervis, v10_ewps_supervise, v2_ewps_supervise
ewps_9IntegerRecommendedI deal with clients/customers/vendors0;10 = No;1 = Yesclients, v10_ewps_clients, v2_ewps_clients
ewps_10IntegerRecommendedHow many hours do you usually work or would you usually be expected to work?v10_ewps_hoursweek_expected, v2_ewps_hoursweek_expected, workhrs
ewps_11IntegerRecommendedHow many hours did you work last week? If you missed time at work last week, please note all reasons whyv10_ewps_hours_lastweek, v2_ewps_hours_lastweek, workweek
ewps_12IntegerRecommendedI had a day off (Holiday/vacation)0;10=Unchecked;1=Checkeddayoff
ewps_13IntegerRecommendedI was physically ill0;10=Unchecked;1=Checkedphysill
ewps_14IntegerRecommendedToo upset, depressed, or nervous0;10=Unchecked;1=Checkeddepress
ewps_15IntegerRecommendedMissed work. Other (please specify)0;10=Unchecked;1=Checkedother, v10_ewps_missedwork_why_other, v2_ewps_missedwork_why_other
ewps_16IntegerRecommendedArrive at work late or leave work early?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysarrivelt, v10_ewps_pastweek_1earlylate, v2_ewps_pastweek_1earlylate
ewps_17IntegerRecommendedTake longer lunch hours or coffee breaks?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwayslngbreak, v10_ewps_pastweek_2longbreak, v2_ewps_pastweek_2longbreak
ewps_18IntegerRecommendedJust do no work at times when you would be expected to be working?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysnowork, v10_ewps_pastweek_3nowork, v2_ewps_pastweek_3nowork
ewps_19IntegerRecommendedFind yourself daydreaming, worrying or staring into space when you should be working?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysdaydream, v10_ewps_pastweek_4daydream, v2_ewps_pastweek_4daydream
ewps_20IntegerRecommendedHave to do a job over because you made a mistake or your supervisor told you to do a job over?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysjobover, v10_ewps_pastweek_5repeatjob, v2_ewps_pastweek_5repeatjob
ewps_21IntegerRecommendedWaste time looking for misplaced supplies, materials, papers, phone numbers, etc.?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysv10_ewps_pastweek_6wastetime, v2_ewps_pastweek_6wastetime, wastetm
ewps_22IntegerRecommendedFind you have forgotten to call someone?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwayscall, v10_ewps_pastweek_7forgetcall, v2_ewps_pastweek_7forgetcall
ewps_23IntegerRecommendedFind you have forgotten to respond to a request?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysrespond, v10_ewps_pastweek_8forgetresponse, v2_ewps_pastweek_8forgetresponse
ewps_24IntegerRecommendedBecome annoyed with or irritated by co-workers boss/supervisor, clients/customers/vendors or others?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysannoyed, v10_ewps_pastweek_9annoyed, v2_ewps_pastweek_9annoyed
ewps_25IntegerRecommendedBecome impatient with others at work?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysimpatient, v10_ewps_pastweek_10impatient, v2_ewps_pastweek_10impatient
ewps_26IntegerRecommendedAvoid attending meetings?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysavmeetin, v10_ewps_pastweek_11avoidmeeting, v2_ewps_pastweek_11avoidmeeting
ewps_27IntegerRecommendedAvoid interaction with co-workers, clients, vendors or supervisors0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysinteract, v10_ewps_pastweek_12avoidothers, v2_ewps_pastweek_12avoidothers
ewps_28IntegerRecommendedHave a co-worker redo something you had completed?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysredowork, v10_ewps_pastweek_13coworkerredo, v2_ewps_pastweek_13coworkerredo
ewps_29IntegerRecommendedFind it difficult to concentrate on the task at hand?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysconcentr, v10_ewps_pastweek_14difficultconcentrate, v2_ewps_pastweek_14difficultconcentrate
ewps_30IntegerRecommendedFall asleep unexpectedly or become very sleepy while at work?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysfallaslp, v10_ewps_pastweek_15asleep, v2_ewps_pastweek_15asleep
ewps_31IntegerRecommendedBecome restless while at work?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysrestless, v10_ewps_pastweek_16restless, v2_ewps_pastweek_16restless
ewps_32IntegerRecommendedNotice that your productivity for the time spent is lower than expected?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwayslowprod, v10_ewps_pastweek_17lowproductivity, v2_ewps_pastweek_17lowproductivity
ewps_33IntegerRecommendedNotice that your efficiency for the time spent is lower than expected?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysloweffic, v10_ewps_pastweek_18lowefficiency, v2_ewps_pastweek_18lowefficiency
ewps_34IntegerRecommendedLose interest or become bored with your work?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysloseint, v10_ewps_pastweek_19bored, v2_ewps_pastweek_19bored
ewps_35IntegerRecommendedWork more slowly or take longer to complete tasks than expected?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysv10_ewps_pastweek_20slow, v2_ewps_pastweek_20slow, workslow
ewps_36IntegerRecommendedHave your boss/co-workers remind you to do things?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysremind, v10_ewps_pastweek_21reminders, v2_ewps_pastweek_21reminders
ewps_37IntegerRecommendedNot want to return phone calls or putt off returning calls?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysputoff, v10_ewps_pastweek_22notreturncall, v2_ewps_pastweek_22notreturncall
ewps_38IntegerRecommendedHave trouble organizing work or setting priorities?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwayssetprior, v10_ewps_pastweek_23organizationproblems, v2_ewps_pastweek_23organizationproblems
ewps_39IntegerRecommendedFail to finish assigned tasks?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysfailfnsh, v10_ewps_pastweek_24failtofinish, v2_ewps_pastweek_24failtofinish
ewps_40IntegerRecommendedFeel too exhausted to do your work?0::40 = Never;1 = Rarely;2 = Sometimes;3 = Often;4 = Almost Alwaysexhaustd, v10_ewps_pastweek_25exhausted, v2_ewps_pastweek_25exhausted
ewps_41IntegerRecommendedSkip form0;10=No; 1=Yesworks
ewpstotIntegerRecommendedEWPS total score
demo_edu_otherString100RecommendedEducation other: specifyv10_ewps_education, v2_ewps_education
occup_spString100RecommendedOccupation other. Please describe:v10_ewps_occupation, v2_ewps_occupation
ewps_3aString20RecommendedDo not receive money or volunteer, why not - other (describe)v10_ewps_no_workvolunteer_why_other, v2_ewps_no_workvolunteer_why_other
ewps_13aString20RecommendedIf you missed work, why - ill (describe)v10_ewps_missedwork_why_ill_describe, v2_ewps_missedwork_why_ill_describe
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: ewps01 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.