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Related Concept Videos

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Ordinal Level of Measurement

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In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
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Interobserver variation in the Parkland scale. Are we seeing the same thing?

José L Maldonado-Calderón1, Lydia E Nava-Rivera2, Antonio Urbina-Zeglen1

  • 1Departamento de Cirugía, Hospital General Universitario Dr. Joaquín Del Valle Sánchez, Facultad de Medicina, Universidad Autónoma de Coahuila (UAdeC), Torreón, Coahuila.

Cirugia Y Cirujanos
|November 26, 2024
PubMed
Summary

The Parkland Grading Scale for Acute Cholecystitis (PGS-AC) shows low surgeon agreement, indicating significant interobserver variability in diagnosing acute cholecystitis. Experience levels influenced diagnostic consistency.

Keywords:
AcuteAgudaCholecystectomyColecistectomíaEscala de ParklandInterobserver variationParkland scaleVariación interobservador

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Area of Science:

  • Surgical diagnostics
  • Medical imaging analysis
  • Clinical assessment tools

Background:

  • Acute cholecystitis requires accurate grading for appropriate treatment.
  • The Parkland Grading Scale for Acute Cholecystitis (PGS-AC) is used to classify disease severity.
  • Assessing the reliability of diagnostic tools is crucial for consistent patient care.

Purpose of the Study:

  • To evaluate the interobserver reliability of the Parkland Grading Scale for Acute Cholecystitis (PGS-AC).
  • To identify factors influencing agreement among surgeons using the PGS-AC.

Main Methods:

  • Analysis of 43 laparoscopic cholecystectomy (LC) images.
  • Online questionnaire distributed to 18 surgeons and residents for PGS-AC classification.
  • Interobserver agreement assessed using the Fleiss κ test.

Main Results:

  • A global Fleiss' κ value of 0.213 indicated low interobserver concordance.
  • Surgical residents showed greater diagnostic agreement.
  • Surgeons with over 10 years of experience or performing >2 LCs weekly had higher concordance.

Conclusions:

  • The Parkland Grading Scale for Acute Cholecystitis (PGS-AC) demonstrates low reliability and high interobserver variation.
  • Diagnostic consistency is influenced by surgeon experience and practice volume.
  • Further refinement or alternative methods may be needed for objective PGS-AC application.