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  1. Home
  3. Painful Differences Between Different Pain Scale Assessments: The Outcome Of Assessed Pain Is A Matter Of The Choices Of Scale And Statistics.
  1. Home
  3. Painful Differences Between Different Pain Scale Assessments: The Outcome Of Assessed Pain Is A Matter Of The Choices Of Scale And Statistics.

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Painful differences between different pain scale assessments: The outcome of assessed pain is a matter of the choices

Elisabeth Svensson1, Iréne Lund2

  • 1Department of Statistics and Informatics, Örebro University, SE-701 82 Örebro, Sweden.

Scandinavian Journal of Pain
|March 19, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Pain scales like VAS and VDS are not interchangeable for measuring perceived pain. Results show limited agreement between different pain assessment methods, highlighting the subjective nature of pain experience.

Keywords:
comparabilitynon-parametric methodsnumeric rating scaleordered categorical datapain scalespaired datarank-invariancerelationshipverbal descriptive scalevisual analogue scale

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Area of Science:

  • Pain research
  • Psychometrics
  • Biostatistics

Background:

  • Perceived pain is subjective and measured using various scales like Visual Analogue Scale (VAS) and Verbal Descriptive Scales (VDS).
  • A key challenge in pain research is determining if different pain assessment scales yield comparable results.
  • This study investigates the comparability of continuous and discretized VAS pain data with VDS datasets from Oswestry Disability Index (ODI) and European Quality of Life Scale (EQ-5D).

Purpose of the Study:

  • To compare continuous and discretized VAS pain data with VDS pain datasets (ODI and EQ-5D).
  • To assess the interchangeability of different pain measurement scales in paired datasets.
  • To evaluate the reliability of pain assessments across different scales.

Main Methods:

  • Utilized non-parametric statistical methods due to the ordinal nature of scale data.
  • Employed two discretization methods for VAS data: equidistant and unbiased intervals.
  • Assessed comparability using bivariate ranking, calculating percentage agreement (PA) and order consistency (MA).

    • Main Results:

    • Continuous VAS data showed limited comparability with VDS pain datasets.
    • For equidistant VAS/VDS pairs, PA ranged from 38% (ODI) to 49% (EQ-5D), with MA of 0.70 and 0.80.
    • Unbiased VAS/VDS pairs yielded higher PA (54% and 100%) and MA (0.77 and 1.0), indicating better, though study-specific, agreement.

    Conclusions:

    • Perceived pain is an individual's subjective experience, not universally measurable by a single scale.
    • Scale interchangeability is study-specific and depends on the discretization method used.
    • While pain cannot be measured unequivocally, individuals can rate their experience on various scales.