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Test-retest reliability of the pain drawing instrument
Ronald B Margolis1, John T Chibnall, Raymond C Tait
1Division of Behavioral Medicine, Department of Psychiatry and Human Behavior, St. Louis University School of Medicine, St. Louis, MO 63104, U.S.A.
Abstract:
Test-retest reliability of a pain drawing instrument was investigated. Pain drawings of chronic pain patients (n = 51) were scored for percentage of total body surface in pain and location of pain. A test-retest reliability coefficient of r = 0.85 was calculated for a time interval that averaged 71 days. In addition, a percentage of agreement based on distribution of pain over time was calculated at 88.2%. The effect on reliability of age, gender and time-interval differences was investigated. The utility of the pain drawing instrument as a measure of extent of pain and location of pain over time is discussed.