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REDCap Introduction User Group Meeting. By J Kevan Essmyer Acknowledgements: Paul Harris. Need for Data Capture Software. Convenient uniform data entry method Stateless web-based Secure WUSM HIPAA compliant centralized data store. Easy to use multi-purpose clinical database
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REDCap IntroductionUser Group Meeting By J KevanEssmyer Acknowledgements: Paul Harris
Need for Data Capture Software • Convenient uniform data entry method • Stateless web-based • Secure WUSM HIPAA compliant centralized data store. • Easy to use multi-purpose clinical database • Not Excel, Not Access, Not 3-4 composition notebooks somewhere on the top shelf • Mostly self service • Reduce data “cleaning” effort during analysis.
Public HTTPS Access Biostatistics Secure Domain Tiresias Server File Server https://redcapsurvey.wustl.edu... REDCap Survey MySQL Server Uploaded Files Authenticated Access Data Sync WEB Server WUCON Data Entry /Admin MySQL Slave Server Data Entry /Admin Installation Files Sidedoor Server Host Server
Development Server“Trying it Out” • http://www.biostat.wustl.edu/redcap • REDCap User Request forms (Fax or email) • Sponsoring PI • Username /password • Open access to the Development server • Off-campus Access • Sidedoor security certificate • Access from any “capable” Internet connection (world wide)
Case Report Forms PDFs Visual Status Data Validation NumerousField Types + Text (Free) (Number) (Phone) (Zip) (Date) +TextArea +Select +Radio +File HumanReadableLabels BranchingLogic Auto-Variable Coding
Study Calendar – Participant Scheduling Participant Scheduling Module Optional Visit-Level View Shows Status + CRFs (Longitudinal Model)
REDCap Application (Classic Model) CRFs – Customized For Each Study REDCap Core Modules– Available For All Studies Project-Level Metadata Defined by Research Team
Audit Trails / Data Logging Full Audit Logs – Data Changes and Page Views
User Permission Rights Hierarchy REDCap Administrators -Grant Access to the System -Grant Creation Rights to PI and Project Admins PI and REDCap Administrators -Full Users Rights to Project -Responsible for setting Right of other users (PHI, Data Entry, Reporting) Regulars Users with restricted permissions
“?!!?” Branching Logic Data Validation User Rights API Data Dictionary Scheduling
REDCap Lifelines • Built-in tutorial videos • Built-in Frequently Asked Question (FAQ) guide • Demonstration Databases (Some Online, more to come) • WUSM BiostatREDCap Email Help Queue • [redcap@rt.biostat.wustl.edu] • Monitored by 4 to 5 Administrators
REDCap Email Support redcap@rt.biostat.wustl.edu
Project Creation Flow Chart Move to Production Status on Production Server and start Data Collection Create Project –Project Name, Longitudinal or Cross-Sectional/ Survey Excel Spreadsheet Or Online Form Designer Test Forms Define Study Events (Longitudinal) add Schedule (optional) Data Entry Forms Add Users and Set User Rights
Production Server“Real Data” • http://www.biostat.wustl.edu/redcap • REDCap Project Request form (Fax or email) • Sponsoring PI • IRB Approval or Waiver • Only PI or Project Admin can create projects • Production “Status” • Data Dictionary • Changes saved • Review of submitted changes to avoid unintended data corruption • Delete all records function disallowed
Automated Data Export / Import (API) • Web based RESTFUL Service • Uses http(s) URL calls similar to the web browser • Programming Language neutral works for • (SAS, R, Python, Java) • Advantages • Automate access to data and metadata • On demand custom Reporting • Linking Multiple REDCap Projects (Advanced) • All Transactions logged
Biostatistics Secure Domain Accessible only from the secure Servers Routes User Program API Call Response REDCap WEB Server Authenticated Access WUCON Data Entry /Admin Data Entry /Admin Sidedoor Server
Automated Data Export / Import (API) • Export Methods • Required items • Token – obtained from REDCap administrator must be kept secure • Content – record • Format – Export data format CSV, JSON, XML(default) • Web based RESTFUL Service • Uses http(s) URL calls similar to the web browser • Programming Language neutral works for • (SAS, R, Python, Java) • Advantages • Automate access to data and metadata • On demand custom Reporting • Linking Multiple REDCap Projects (Advanced) • All Transactions logged
Simple SAS Example • filename ein "./etest_in.txt"; • filename eout "./etest_out.txt"; • filename ehdrout "./etest_hdrout.txt"; • data _null_; • file ein; input; put _infile_; datalines4; • token=8190DC542E1588AF52158EB181193DB9 • &content=record&format=xml&type=flat • &fields=id, first_name, last_name • ;;;; run; quit; • proc http • in=ein out=eoutheaderout=ehdrout • url="https://redcap.biostat.lan/redcap/srvrs/dev_v3_1_0_001/redcap/api/index.php" • method="post" • ct="application/x-www-form-urlencoded” ; run;
REDCap Goals • Easy to use • Metadata Driven • Adaptable Features • Data entry validation • Self service tool Questions?
Calculations • Simple • [weight]*10000/([height]*[height]) • Complex • Calculating the Mean of groups with null valid range includes zeroThe following equation will calculate the Mean of a list of variables • ((if(Math.abs([A])>0,[A],0)) +(if(Math.abs([B])>0,[B],0))+(if(Math.abs([C])>0,[C],0)))/((if(Math.abs([A])>0,1,if([A]=0,1,0))+if(Math.abs([B])>0,1,if([B]=0,1,0))+if(Math.abs([C])>0,1,if([C]=0,1,0)))