ORS Reliable Change Chart

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A simple, easy to use chart for determining whether changes as assessed via the ORS qualify as reliable; that is, greater than chance, maturation, and measurement error.

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ORS Reliable Change Chart

  1. 1. ORS/CORS Reliable Change Chart 0 During or Post Treatment Score 5 Reliable No Reliable 10 Deterioration Change 5 point or more worsening from 15 pre-treatment score No 20 Reliable Change 25 Reliable Change Clinically 5 point or more Significant Change! 30 No Reliable improvement 5 point or more Change from pre- improvement from treatment score pre-treatment score 35 and crossed the cutoff score for age group 40 40 35 30 25 20 15 10 5 0 Pre-Treatment ScoreInstructions: To determine if any measured change is reliable, find the point where theinitial session “Pre-Treatment Score” and the “During or Post Treatment Score” intersect.Use cutoff scores table below to help work out if “Reliable Change” is also “ClinicallySignificant Change”. Clinical Cutoff Scores CORS (ages 6-12) Child (Self-reporting) 32 Carer (Reporting on child) 28 ORS (ages 13 +) Ages 13-17 28 Ages 18 + 25 © 2012, Scott D. Miller, Ph.D. www.scottdmiller.com

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