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European Spine Journal

, Volume 21, Issue 12, pp 2550–2557

First Online: 03 July 2012Received: 10 January 2012Revised: 23 May 2012Accepted: 09 June 2012

Abstract

PurposeTo investigate relevant change on the Neck Pain and Disability Scale NPAD and Neck Disability Index NDI and which questionnaire is the most responsive in patients with non-specific chronic neck pain CNP.

MethodsSeventy-six patients with non-specific CNP in an outpatient tertiary rehabilitation setting were dichotomized into -improved- and -stable- based on global perceived effect GPE scores. To investigate relevant change minimal detectable change MDC and minimal important change MIC with the receiver operator characteristic ROC cut-off point were assessed. Comparison of responsiveness was performed using areas under the ROC curve AUC and correlations between change scores of NPAD and NDI, and GPE.

ResultsMDC and MIC on NPAD scale 0–100 were 31.7 and 11.5 points, respectively. MDC and MIC on NDI scale 0–50 were 8.4 and 3.5 points, respectively. Changes should exceed this MDC or MIC cut-off to be interpreted as relevant. AUC was 0.75 for both NPAD and NDI. Correlations between change scores of NPAD and NDI, and GPE were, respectively, 0.48 95 % CI 0.29–0.64 and 0.49 95 % CI 0.30–0.64.

ConclusionsRelevant change on both NPAD and NDI assessed with MDC and MIC resulted in different cut-offs and consequently with different amounts of certainty that the patient is improved. Responsiveness of NPAD and NDI was similar.

KeywordsClinically important change Neck disability questionnaires Non-specific neck pain Disability  Download fulltext PDF



Autor: Wim Jorritsma - Pieter U. Dijkstra - Grietje E. de Vries - Jan H. B. Geertzen - Michiel F. Reneman

Fuente: https://link.springer.com/



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