4.2 Article

Exploring the Face Validity of the Pain Numeric Rating Scale Among Healthcare Providers

Journal

JOURNAL OF NEUROSCIENCE NURSING
Volume 53, Issue 5, Pages 215-219

Publisher

LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/JNN.0000000000000600

Keywords

critical care; numeric rating scale; nursing; pain assessment; validity

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The study revealed limitations in the face validity of the NRS and the high variance in NRS scores reaffirmed the subjectivity of pain perception. This calls into question the utility of using NRS scores to determine analgesic dosages.
BACKGROUND: Healthcare providers (HCPs) use the numeric rating scale (NRS) under the assumption that it provides reliable information from which to make decisions regarding analgesic administration. METHODS: We explored the face validity of the NRS using a prospective single-blinded observational design. Pre and post NRS scores were obtained from HCPs who submerged their hand in a bucket of ice water (pain stimulus). RESULTS: Despite a consistent similar pain source, individual HCPs rated their pain very differently (range, 2-10), and there was a significant difference in self-estimated pain tolerance (mu = 7.06 [SD, 1.43]) and actual pain scores (mu = 6.35 [SD, 2.2]; t = 4.08, P < .001). CONCLUSION: The findings indicate a limitation in the face validity of the NRS. The high variance in NRS scores reaffirms the subjectivity of pain perception and brings into question the utility of using NRS scores when determining analgesic dosages.

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