Clinical research instruments are commonly distributed as PDFs - published validated scales, sponsor-provided CRFs, CTSA-approved research instruments, and regulatory agency templates. Converting these PDFs to REDCap Data Dictionary format is the first step in every REDCap study setup involving existing instruments. Pirai AI converts both native digital PDFs and scanned paper CRFs to REDCap Data Dictionary CSV with verbatim field labels preserved from the source document.
Native PDFs and Scanned PDFs - Both Supported
Native digital PDFs are created electronically - the text is selectable. Common sources include published validated scales downloaded from publisher websites, sponsor eTMF (electronic Trial Master File) CRF templates, CTSA-provided instrument repositories, and NIH Common Data Elements (CDE) repository downloads. Upload directly to Pirai AI without any additional settings.
Scanned paper PDFs are physical CRFs or instruments photographed or scanned to PDF - the text exists as an image, not selectable text. Common sources include paper CRFs from legacy studies being migrated to REDCap, older instrument versions printed and scanned, and regulatory-submission paper instruments. Enable Advanced PDF Processing before uploading - Pirai AI runs OCR to extract field text from the scanned image.
Commonly Converted PDF Instruments
- PROMIS measures (NIH-developed Patient-Reported Outcomes): Short forms and item banks downloaded from HealthMeasures.net as PDFs
- PHQ-9, GAD-7, PHQ-4: Mental health screening instruments in PDF widely used in primary care research
- SF-36 and SF-12: Health outcomes measures distributed as PDFs for non-commercial research use
- AUDIT and AUDIT-C: WHO alcohol use screening instruments
- PCL-5 and PCL-C: PTSD Checklist instruments from the US National Center for PTSD
- Sponsor CRFs: Industry-sponsored trial CRFs provided as Word or PDF templates for site-specific REDCap implementation
- DASS-21: Depression, Anxiety and Stress Scale - widely used in Australian and international research
- EQ-5D: EuroQol health utility measure used in health economics research
Converting a PDF to REDCap Data Dictionary
1. Go to platform.piraiai.com. For scanned PDFs, enable Advanced PDF Processing. Upload your PDF.
2. Review extracted questions in the workspace. For validated scales, pay particular attention to exact wording of field labels - compare against the published instrument to confirm verbatim extraction.
3. Select REDCap and download the Data Dictionary CSV.
4. Import via REDCap Project Setup > Data Dictionary > Upload File > Commit Changes.
5. In the Online Designer, add branching logic, required field settings, and scoring calculations (for validated scales with scoring algorithms).
Special Considerations for Validated Instruments
Validated clinical and psychometric scales require exact verbatim wording - any change to question or response option text invalidates the instrument's psychometric properties and may require ethics re-approval. After Pirai AI generates the Data Dictionary, compare field labels systematically against the published instrument (or the version cited in your ethics protocol) before importing. The workspace shows extracted text alongside the source for this purpose.
For instruments with published scoring algorithms (PHQ-9 total, SF-36 subscales, PROMIS T-scores), add Calculation fields in the Online Designer after import. Pirai AI generates the question fields; scoring calc fields are added manually as they require the specific numeric codes used in the instrument's scoring algorithm.
Frequently Asked Questions
Upload the PDF to Pirai AI at platform.piraiai.com (enable Advanced PDF Processing for scanned PDFs). Select REDCap. Download the Data Dictionary CSV. Import via REDCap Project Setup > Data Dictionary > Upload File > Commit Changes. For validated scales, compare field labels against the published instrument before import to confirm verbatim extraction.
Yes. Enable Advanced PDF Processing before uploading your scanned CRF PDF. Pirai AI runs OCR to extract field text from the scanned image and generates the REDCap Data Dictionary CSV. Review extracted fields in the workspace carefully - OCR accuracy is high for clean black-and-white printed CRFs but review is essential before importing into a clinical study.
After importing the Data Dictionary, add Calculation fields in the REDCap Online Designer. Set the Field Type to calc and enter the scoring formula using REDCap's calculation syntax - for example, for PHQ-9 total: sum([phq9_q1], [phq9_q2], ..., [phq9_q9]). Use the specific numeric codes from the instrument's scoring algorithm in your field variable names.
Any PDF instrument that extracts correctly - including PROMIS measures, PHQ-9, GAD-7, SF-36, SF-12, AUDIT, PCL-5, DASS-21, EQ-5D, sponsor CRFs, CTSA instruments, and custom study questionnaires. For native digital PDFs, extraction is direct. For scanned PDFs, enable Advanced PDF Processing for OCR extraction.
Convert Your Clinical PDF to REDCap Data Dictionary
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