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Updated: Sep 10, 2025

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse POP Quantification System
Published on: September 20, 2018
To err is human: lessons from prolapse studies to identify and strategies to reduce data errors.
Deborah L Myers1, Adrienne J Werth2, Ryan Whitworth3
1The Division of Urogynecology and Reconstructive Pelvic Surgery, Department of Obstetrics and Gynecology, Brown University, Providence, RI.
This study details a quality improvement process for pelvic organ prolapse quantification (POP-Q) data in clinical trials. Implementing standardized forms and audits reduces errors, ensuring reliable research outcomes for pelvic floor disorders.
Area of Science:
- Urogynecology
- Clinical Research Methodology
- Data Quality Assurance
Background:
- Pelvic organ prolapse (POP) research requires accurate measurement of prolapse quantification (POP-Q) data.
- The Pelvic Floor Disorders Network (PFDN) developed a quality improvement auditing process to ensure data integrity in POP trials.
Purpose of the Study:
- To describe the PFDN's quality improvement auditing process for POP-Q measurements.
- To present an updated POP-Q form for standardized data collection in prolapse research.
Main Methods:
- Review of PFDN steering committee minutes.
- Analysis of data coordinating center audit reports.
- Examination of case report forms from prolapse studies.
Main Results:
- Common errors included data entry mistakes, incorrect documentation, sign errors, and inaccurate Ba/Bp point assessments.
- Quality tools implemented: improved case report forms, staff education, internal/central data audits, electronic data monitoring, clinical review, and source change protocols.
Conclusions:
- The described framework offers best practices for data collection and quality improvement in POP research.
- The quality tools can be applied to primary outcomes in various research trials beyond pelvic floor disorders.
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