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Document type:
Journal Article 
Author(s):
Martin, Mona L; Blum, Steven I; Liedgens, Hiltrud; Bushnell, Donald M; McCarrier, Kelly P; Hatley, Noël V; Ramasamy, Abhilasha; Freynhagen, Rainer; Wallace, Mark; Argoff, Charles; Eerdekens, Mariёlle; Kok, Maurits; Patrick, Donald L 
Title:
Mixed-methods development of a new patient-reported outcome instrument for chronic low back pain: part 1-the Patient Assessment for Low Back Pain - Symptoms (PAL-S). 
Abstract:
We describe the mixed-methods (qualitative and quantitative) development and preliminary validation of the Patient Assessment for Low Back Pain-Symptoms (PAL-S), a patient-reported outcome measure for use in chronic low back pain (cLBP) clinical trials. Qualitative methods (concept elicitation and cognitive interviews) were used to identify and refine symptom concepts and quantitative methods (classical test theory and Rasch measurement theory) were used to evaluate item- and scale-level perform...    »
 
Journal title abbreviation:
Pain 
Year:
2018 
Journal volume:
159 
Journal issue:
Pages contribution:
1045-1055 
Print-ISSN:
0304-3959 
TUM Institution:
Klinik für Anästhesiologie (DHM)