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Related Concept Videos

Ordinal Level of Measurement00:55

Ordinal Level of Measurement

The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of measurement. For analysis, data are classified into four levels of measurement—nominal, ordinal, interval, and ratio.
Data measured using an ordinal scale are similar to nominal scale data, but there is one major difference. The ordinal scale data can be ordered. An example of ordinal scale data is a list of the top five national parks in the...
Nominal Level of Measurement00:56

Nominal Level of Measurement

The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of measurement. Not every statistical operation can be used with every set of data. For analysis, data are classified into four levels of measurement—nominal, ordinal, interval, and ratio.
The data that cannot be measured but can be grouped into categories fall under the nominal level of measurement. Data that is measured using a nominal scale is...

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Multi-Modal Signals for Analyzing Pain Responses to Thermal and Electrical Stimuli
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How simple can it get? Measuring pain with NRS items or binary items.

Judith Rothaug1, Thomas Weiss, Winfried Meissner

  • 1Clinic for Anesthesiology and Intensive Care, University Hospital Jena, Germany. judith.rothaug@med.uni-jena.de

The Clinical Journal of Pain
|February 2, 2013
PubMed
Summary
This summary is machine-generated.

Pain interference can be assessed using numerical rating scales (NRS) or binary yes/no items. Both methods are reliable, but most patients prefer the simpler binary format for pain assessment.

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Area of Science:

  • Pain management research
  • Clinical outcomes assessment
  • Patient-reported outcomes

Background:

  • Functional interference of postoperative pain is a key outcome.
  • Numerical rating scales (NRS) and binary items are used for pain assessment.
  • Patient acceptance of assessment methods is crucial for clinical implementation but understudied.

Purpose of the Study:

  • Compare psychometric properties and patient preferences of NRS and binary pain interference assessments.
  • Evaluate the suitability of different answer formats for routine clinical use.
  • Analyze pain interference in postoperative patients across surgical disciplines.

Main Methods:

  • Analysis of psychometric quality, clinical significance, and patient preferences.
  • Utilized data from 430 patients across abdominal, orthopedic/trauma, and oromaxillofacial surgery.
  • Compared numerical rating scales (NRS) with binary (yes/no) answer formats.

Main Results:

  • Both NRS and binary formats demonstrated satisfactory reliability and validity.
  • High test-retest reliability (0.724-0.885) and construct validity were observed for both.
  • Two-thirds of patients preferred the binary answer format over NRS.

Conclusions:

  • The binary answer format is a practical and preferred alternative to NRS for pain screening.
  • Comparing binary and NRS answers enhances understanding of clinical relevance.
  • Patient preference supports the adoption of binary formats in postoperative pain management.