redcap and ddi - ku scholarworks - the university of kansas
TRANSCRIPT
![Page 1: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/1.jpg)
REDCap and DDI Exporting Data and Metadata with the API
Larry Hoyle and Ada Van Roekel Institute for Policy & Social Research
University of Kansas
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 1
![Page 2: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/2.jpg)
REDCap Consortium http://project-redcap.org/
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 2
![Page 3: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/3.jpg)
REDCap Citation
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 3
![Page 4: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/4.jpg)
REDCap as an Environment • Secure • Web based • Build and manage online surveys and databases
– Online Designer – Excel template file
• Exports to SPSS, SAS, Stata, and R • Project management features
– Calendar, scheduling, email notices, reporting, triggers, longitudinal studies, rights and permissions
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 4
![Page 5: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/5.jpg)
R Function REDCapAPI_ToDDI <- function(secret_token ="", # the token for the user&project DDIinstanceFile="", # the output DDI file EchoDDI=FALSE, # if TRUE, print the generated DDI to the console IncludeData=TRUE, # if TRUE, include PhysicalRecordSegment and output StudyTitle="Study Title goes here", # the title of the study agency="example.org", # the agency responsible for the data organizationSchemeNameText="Org scheme", # the name for the # Organization Scheme organizationNameText="Organization name", # the organization name CurrentVersion="1.0.0", # the default current version number EmbargoEndDateValue="2112-01-01T01:01:01" # a dateTime at which the embargo on Personally Identifiable data will expire )
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 5
![Page 6: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/6.jpg)
Test – DDI to Colectica Express
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 6
![Page 7: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/7.jpg)
Test – Data into SAS
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 7
![Page 8: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/8.jpg)
Start Screen
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 8
![Page 9: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/9.jpg)
Online Designer – Project Setup
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 9
![Page 10: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/10.jpg)
Project Setup (continued)
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 10
![Page 11: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/11.jpg)
Online Designer – Question Sequence
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 11
DDI <Instrument> <Sequence> <ControlConstruct> <Universe>
![Page 12: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/12.jpg)
NADDI Pre-Conference Survey
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 12
![Page 13: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/13.jpg)
Interest in This Presentation
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 13
![Page 14: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/14.jpg)
Individual Question
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 14
DDI Categories Codes Questions Variables Name Label Representation StatementItem
![Page 15: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/15.jpg)
Field Types
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 15
Representation And Layout Can imply multiple automatic variables
![Page 16: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/16.jpg)
Branching Conditional execution of one question and its header and footer
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 16
![Page 17: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/17.jpg)
Events
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 17
![Page 18: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/18.jpg)
Event to Instrument Mappings
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 18
![Page 19: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/19.jpg)
Data entry management - subject
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 19
![Page 20: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/20.jpg)
All records
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 20
![Page 21: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/21.jpg)
Exporting from REDCap
• Interactive – Forms metadata – Data
• API – Forms metadata – Data – Users (this is researchers, not respondents)
– Events – Form-Event Mappings
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 21
![Page 22: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/22.jpg)
Exporting Metadata (Codebook) - GUI
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 22
Note the multiple forms
![Page 23: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/23.jpg)
REDCap API – export form-event mappings
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 23
![Page 24: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/24.jpg)
HTML form to Test API
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 25
<form action="https://r<host>/api/" method="POST" name="form1" target="_blank" id="form1">
Token is specific to project and authorized person
<input type="text" name="token" id="token" />
![Page 25: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/25.jpg)
Data - Records_flat as csv
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 26
![Page 26: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/26.jpg)
Records – Flat (all forms in one table)
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 27
prescreening_survey
participant_info_survey
participant_morale_questionnaire
![Page 27: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/27.jpg)
FormEventMapping
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 28
![Page 28: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/28.jpg)
Metadata (Codebook)
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 30
![Page 29: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/29.jpg)
Events
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 32
![Page 30: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/30.jpg)
Example R code (from REDCap Documentation)
# Load needed libraries # --> NOTE: RCurl is dependent on bitops library(bitops) library(RCurl) library(Hmisc) library(xtable) # Set secret token specific to your REDCap project secret_token = 'YOUR_API_TOKEN' # Set the url to the api (ex. https://YOUR_REDCAP_INSTALLATION/api/) api_url = 'YOUR_API_URL/'
curl_handle = getCurlHandle() curlSetOpt(ssl.verifypeer = FALSE, curl = curl_handle) y <- postForm(api_url, token = secret_token,
content = 'formEventMapping',
format = 'csv', curl = curl_handle) x <- read.table(file = textConnection(y), header = TRUE, sep = ",", na.strings = "", stringsAsFactors = FALSE) rm(secret_token, y) x
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 33
![Page 31: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/31.jpg)
REDCAP TO DDI
An R program uses the API to pull available data and metadata and writes a DDI 3.1 file.
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 34
![Page 32: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/32.jpg)
One Row, CSV File (Excel Template)
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 35
• Variable / Field Name • Form Name • Section Header • Field Type • Field Label • Choices, Calculations, OR Slider Labels • Field Note • Text Validation Type OR Show Slider Number • Text Validation Min • Text Validation Max • Identifier? • Branching Logic (Show field only if...) • Required Field? • Custom Alignment • Question Number (surveys only) • Matrix Group Name
TASK From: One row per question (with Header and Note) To: Hierarchical DDI structure
![Page 33: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/33.jpg)
Sliders
• Return a value between 0 and 100 • End and mid points labeled • Optionally display the numeric value
• How to represent?
– Numeric – Categories for some values (0, 50 , 100)?
• Recorded in the NumericDomain Description
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 44
![Page 34: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/34.jpg)
Slider as Numeric question/variable
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 45
This Description added to the NumericDomain REDCap Field Type: slider . NOTE: This question has a minimum of 0 and a maximum of 100. The end and middle points were labeled as: 0, You can provide labels above the slider | 50, Middle label | 100, Right-hand label
![Page 35: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/35.jpg)
Could be Slider as Coded variable
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 46
This Description added to the CodeDomain REDCap Field Type: slider . NOTE: The REDCap slider field returns a numeric value between 0 and 100, but may have labels for the end and mid points.
![Page 36: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/36.jpg)
CSV values for a conditional question
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 47
The header and note will also be displayed conditionally
The Question and surrounding text will appear when this REDCap expression is true
hidden_branch,survey,"Section Header immediately before question hidden_branch ",text,"HIDDEN QUESTION: This question will only appear when you select the second option of the question immediately above.",,"A Field Note for a hidden question",,undefined,undefined,,"[radio_branch] = ""2""",,,,
Branching Logic (Show field only if...) [radio_branch] = "2"
![Page 37: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/37.jpg)
ControlConstruct chain to build the Instrument
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 48
DDI d:StatementItem
DDI d:QuestionConstruct
DDI d:StatementItem DDI d:Sequence
DDI d:IfThenElse
DDI d:Sequence (master sequence)
DDI d:Instrument
![Page 38: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/38.jpg)
More complex Instrument issues
• REDCap can set an option that ends the session upon entry of a particular value (a "stop action") – This could be represented with IfThenElse of a
Sequence • Not done in this version
• REDCap has a Matrix Group construct – This is partly a layout issue but could be better
documented with a sub-sequence than in this version of the program
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 49
![Page 39: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/39.jpg)
Data
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 50
Some automatic variables
One row per participant event
![Page 40: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/40.jpg)
Data - Paradata
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 51
Some paradata
"0, Incomplete | 1, Unverified | 2, Complete"
![Page 41: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/41.jpg)
Data Multiple Forms
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 52
Data from form 1 participant_info_survey
Same variable in two forms has to have different name
Data from form 2 participant_morale_questionnaire
![Page 42: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/42.jpg)
Data Multiple Forms
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 53
Data from form 1 participant_info_survey
Multiple Instruments in DDI
Data from form 2 participant_morale_questionnaire
![Page 43: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/43.jpg)
R Function REDCapAPI_ToDDI <- function(secret_token ="", # the token for the user&project DDIinstanceFile="", # the output DDI file EchoDDI=FALSE, # if TRUE, print the generated DDI to the console IncludeData=TRUE, # if TRUE, include PhysicalRecordSegment and output StudyTitle="Study Title goes here", # the title of the study agency="example.org", # the agency responsible for the data organizationSchemeNameText="Org scheme", # the name for the # Organization Scheme organizationNameText="Organization name", # the organization name CurrentVersion="1.0.0", # the default current version number EmbargoEndDateValue="2112-01-01T01:01:01" # a dateTime at which the embargo on Personally Identifiable data will expire )
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 54
![Page 44: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/44.jpg)
Test – DDI to Colectica Express
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 55
![Page 45: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/45.jpg)
Test – Data into SAS
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 56
![Page 46: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/46.jpg)
DDI TO REDCAP
Going the other way – defining a REDCap survey by transforming a DDI 3.1 file to a REDCap csv template.
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 57
![Page 47: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/47.jpg)
Hierarchical DDI to one row per Question
• REDCap uses Code/Category schemes by repetition instead of by reference
• DDI Instruments may be much more complex than a simple sequence with a conditional display of a question. – Combining REDCap calculated fields with
conditional display might allow Loop, RepeatUntil etc. function.
– Parsing Instrument and ControlConstructs not done in this version.
• E.g. no Section Headers or Field Notes
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 58
![Page 48: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/48.jpg)
Hierarchical DDI to one row per Question • URNs not evaluated • Coded questions treated as "radio" fields. • "checkbox" (multiple response)
– multiple variables not generated – placed note in CodeDomain Description (not
machine actionable) – treated as radio
• Calculated fields not generated – Could look for d:ComputationItem
• Would require parsing arbitrary programming code and generating REDCap syntax
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 59
![Page 49: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/49.jpg)
ISSUES
The metadata models for REDCap and DDI are not exactly the same. Where do they not match up?
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 60
![Page 50: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/50.jpg)
Issues
• Full DDI complexity not representable in REDCap • REDCap co-mingles layout with content metadata
dropdown, radio, slider, - checkbox • REDCap field type of “file” – file upload action • REDCap export does not include project
management features that it has (email triggers, scheduling. No perfect place for that in DDI?
• DDI 3.1 doesn’t handle numeric variables with some labeled values well (like slider fields)
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 61
![Page 51: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/51.jpg)
Issues
• REDCap allows minimum and maximum for DateTime types
• DDI allows multiple low, high pairs for numeric variables – REDCap has just one pair
• REDCap can mark a Question as "required" • REDCap can mark a Question as having
personally identifiable information. • REDCap – Some metadata only exportable
through the API, some not at all Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 62
![Page 52: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/52.jpg)
Issues
• DDI 3.1 has no Description for a QuestionItem, no good place to put notes about display options
• ResourcePackage vs. Studyunit – Where do Questions, Variables, Categories, Codes go? – Used ResourcePackage (more compatible with
Colectica, which I used for validation)
• REDCap doesn’t separate question and variable – same question in two different forms is two entities
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 63
![Page 53: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/53.jpg)
REDCap Events Issues
• Does anything in DDI represents the scheduling of forms by events in a machine actionable way?
• The <Description> element in each <Instrument> may indicate the events for which the instrument is used
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 64
![Page 54: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/54.jpg)
Contact
• Larry Hoyle Senior Scientist Institute for Policy & Social Research, University of Kansas 1541 Lilac Lane, Blake 607 Lawrence, KS 66045-3129
[email protected] http://www.ipsr.ku.edu
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 65
![Page 55: REDCap and DDI - KU ScholarWorks - The University of Kansas](https://reader031.vdocuments.site/reader031/viewer/2022021305/6207395349d709492c2f3259/html5/thumbnails/55.jpg)
Acknowledgements Synthetic study data were collected and managed using REDCap electronic data capture tools hosted at The University of Kansas.1 REDCap (Research Electronic Data Capture) is a secure, web-based application designed to support data capture for research studies, providing: 1) an intuitive interface for validated data entry; 2) audit trails for tracking data manipulation and export procedures; 3) automated export procedures for seamless data downloads to common statistical packages; and 4) procedures for importing data from external sources. 1Paul A. Harris, Robert Taylor, Robert Thielke, Jonathon Payne, Nathaniel Gonzalez, Jose G. Conde, Research electronic data capture (REDCap) - A metadata-driven methodology and workflow process for providing translational research informatics support, J Biomed Inform. 2009 Apr;42(2):377-81.
Revised 2/17/2013 NADDI 2013, Hoyle & Van Roekel, REDCap and DDI 70