• Clin J Pain · Jul 2002

    Randomized Controlled Trial Comparative Study Clinical Trial

    Comparison of multiple against single pain intensity measurements in complex regional pain syndrome type I: analysis of 54 patients.

    • Tymour Forouzanfar, Marius Kemler, Alfons G H Kessels, Albere J A Köke, van Kleef Maarten M, and Wilhelm E J Weber.
    • Department of Anesthesiology, Pain Management and Research Center, University Hospital Maastricht, Maastricht, The Netherlands. TFOR@sane.azm.nl
    • Clin J Pain. 2002 Jul 1; 18 (4): 234-7.

    ObjectiveTo describe the comparison of multiple and single pain ratings in patients with complex regional pain syndrome type I (CRPS I).DesignCorrelation, agreement, and reliability analyses were performed between the average pain intensity measured 3 times a day over a course of 4 days and one single pain rating (designated the "recalled average" pain, as assessed by the patient) before treatment and at 1-, 3-, and 6-month periods after treatment.PatientsThe patient population consisted of 54 patients with CRPS I in a randomized trial.ResultsThe results show that both measurements correlate and have excellent agreement. Furthermore, both ratings measure significant pain reduction after treatment; "recalled average" pain, however, reflects greater change in pain intensity.ConclusionsIn patients with CRPS I a single pain rating is an accurate predictor of the average pain measured by a multiple pain-rating test. Moreover, both assessments are accurate enough to determine changes in pain over time with an effective treatment.

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