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Validation of the multiple sclerosis international quality of life (MusiQoL) questionnaire in Norwegian patients
Author(s) -
Beiske A. G.,
Baumstarck K.,
Nilsen R. M.,
Simeoni M.C.
Publication year - 2012
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.2011.01518.x
Subject(s) - norwegian , cronbach's alpha , construct validity , intraclass correlation , spearman's rank correlation coefficient , quality of life (healthcare) , discriminant validity , medicine , criterion validity , physical therapy , external validity , psychology , reliability (semiconductor) , psychometrics , clinical psychology , internal consistency , statistics , mathematics , social psychology , power (physics) , physics , quantum mechanics , philosophy , linguistics , nursing
Beiske AG, Baumstarck K, Nilsen RM, Simeoni M‐C. Validation of the multiple sclerosis international quality of life (MusiQoL) questionnaire in Norwegian patients.
Acta Neurol Scand: 2012: 125: 171–179.
© 2011 John Wiley & Sons A/S. Objectives – To assess the validity and reliability of the multidimensional, self‐administered Multiple Sclerosis International Quality of Life (MusiQoL) questionnaire, previously validated in a large international sample, in Norwegian patients. Patients and methods – Patients with different types and severities of multiple sclerosis (MS) were recruited from a single MS centre in Norway. All patients completed the MusiQoL and Short Form‐36 (SF‐36) QoL questionnaires at baseline and a mean of 21 (SD 7) days later. A neurologist collected sociodemographic, MS history and outcome data. Construct validity, internal consistency, reproducibility and external consistency were tested. Results – One hundred and four patients were evaluated. Construct validity was confirmed in terms of satisfactory item internal consistency correlations in eight of nine MusiQoL dimensions (Spearman’s correlation: 0.34–0.79) and scaling success of item discriminant validity (75.0–100%). All dimensions of the MusiQoL questionnaire exhibited satisfactory internal consistency (Cronbach’s alpha: 0.44–0.87) and reproducibility (intraclass correlation coefficients: 0.36–0.86). External validity testing showed that the global MusiQoL score correlated significantly with all but one individual SF‐36 dimension score (Spearman’s correlation: 0.29–0.56). Conclusions – These results demonstrate that the Norwegian‐language version of the MusiQoL questionnaire is a valid and reliable instrument for assessing health‐related QoL in Norwegian patients with MS.