Reliability of the Visual Analog Scale for Measurement of Acute Pain

Academic Emergency Medicine - Tập 8 Số 12 - Trang 1153-1157 - 2001
Polly E. Bijur1, Wendy G. Silver1, E.John Gallagher1
1Department of Emergency Medicine, Albert Einstein College of Medicine, Bronx, NY

Tóm tắt

Abstract Objective: Reliable and valid measures of pain are needed to advance research initiatives on appropriate and effective use of analgesia in the emergency department (ED). The reliability of visual analog scale (VAS) scores has not been demonstrated in the acute setting where pain fluctuation might be greater than for chronic pain. The objective of the study was to assess the reliability of the VAS for measurement of acute pain. Methods: This was a prospective convenience sample of adults with acute pain presenting to two EDs. Intraclass correlation coefficients (ICCs) with 95% confidence intervals (95% CIs) and a Bland‐Altman analysis were used to assess reliability of paired VAS measurements obtained 1 minute apart every 30 minutes over two hours. Results: The summary ICC for all paired VAS scores was 0.97 [95% CI = 0.96 to 0.98]. The Bland‐Altman analysis showed that 50% of the paired measurements were within 2 mm of one another, 90% were within 9 mm, and 95% were within 16 mm. The paired measurements were more reproducible at the extremes of pain intensity than at moderate levels of pain. Conclusions: Reliability of the VAS for acute pain measurement as assessed by the ICC appears to be high. Ninety percent of the pain ratings were reproducible within 9 mm. These data suggest that the VAS is sufficiently reliable to be used to assess acute pain.

Từ khóa


Tài liệu tham khảo

10.1016/S0196-0644(96)70214-7

10.1136/ard.37.4.378

10.1136/ard.38.6.560

10.1017/S0033291700009934

10.1016/0885-3924(96)00128-5

10.1016/S0196-0644(96)70238-X

10.1111/j.1553-2712.1998.tb02667.x

Libman M, 2000, Independent validation of the minimum clinically important change in pain scores as measured by visual analog scale [abstract]., Acad Emerg Med, 7, 550

10.1016/S0140-6736(86)90837-8

10.1136/bmj.313.7048.41

Porter AMW., 1999, Misuse of correlation and regression in three medical journals., J R Soc Med, 92, 123, 10.1177/014107689909200306

Fleiss JL., 1986, The Design and Analysis of Clinical Experiments

Crocker L, 1986, Introduction to Classical and Modern Test Theory

10.1177/096228029900800204

DeLoach LJ, 1998, The visual analog scale in the immediate postoperative period: intrasubject variability and correlation with a numeric scale., Anesth Analg, 86, 102

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Academic Emergency Medicine

Tập 8 Số 12

1153-1157

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