• Jacqueline F M van Dijk, Sigrid C J M Vervoort, Albert J M van Wijck, Cor J Kalkman, and Marieke J Schuurmans.
• Pain Clinic, Department of Anesthesiology, University Medical Center Utrecht, The Netherlands. Electronic address: j.f.m.vandijk@umcutrecht.nl.
• Int J Nurs Stud. 2016 Jan 1; 53: 260-9.

BackgroundIn postoperative pain treatment patients are asked to rate their pain experience on a single uni-dimensional pain scale. Such pain scores are also used as indicator to assess the quality of pain treatment. However, patients may differ in how they interpret the Numeric Rating Scale (NRS) score.ObjectivesThis study examines how patients assign a number to their currently experienced postoperative pain and which considerations influence this process.MethodsA qualitative approach according to grounded theory was used. Twenty-seven patients were interviewed one day after surgery.ResultsThree main themes emerged that influenced the Numeric Rating Scale scores (0-10) that patients actually reported to professionals: score-related factors, intrapersonal factors, and the anticipated consequences of a given pain score. Anticipated consequences were analgesic administration-which could be desired or undesired-and possible judgements by professionals. We also propose a conceptual model for the relationship between factors that influence the pain rating process. Based on patients' score-related and intrapersonal factors, a preliminary pain score was "internally" set. Before reporting the pain score to the healthcare professional, patients considered the anticipated consequences (i.e., expected judgements by professionals and anticipation of analgesic administration) of current Numeric Rating Scale scores.ConclusionsThis study provides insight into the process of how patients translate their current postoperative pain into a numeric rating score. The proposed model may help professionals to understand the factors that influence a given Numeric Rating Scale score and suggest the most appropriate questions for clarification. In this way, patients and professionals may arrive at a shared understanding of the pain score, resulting in a tailored decision regarding the most appropriate treatment of current postoperative pain, particularly the dosing and timing of opioid administration.Copyright © 2015 Elsevier Ltd. All rights reserved.

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