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The individualized neuromuscular quality of life questionnaire: Cultural translation and psychometric validation for the Dutch population
Author(s) -
Seesing Femke M.,
Vught Lisanne EWM,
Rose Michael R.,
Drost Gea,
Engelen Baziel G.M.,
Wilt GertJan
Publication year - 2015
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24337
Subject(s) - cronbach's alpha , quality of life (healthcare) , reliability (semiconductor) , population , psychometrics , psychology , concurrent validity , correlation , physical therapy , medicine , clinical psychology , mathematics , internal consistency , environmental health , power (physics) , physics , geometry , quantum mechanics , psychotherapist
In this study we describe the translation and psychometric evaluation of the Dutch Individualized Neuromuscular Quality of Life (INQoL) questionnaire. Methods Backward and forward translation of the questionnaire was executed, and psychometric properties were assessed on the basis of reliability and validity. Results Two hundred six patients were included in the study. Reliability analyses resulted in Cronbach alpha values of >0.70 for all subdomains. Known‐group validity showed a significant correlation between INQoL scores and severity as well as age for the majority of subdomains. Item‐total correlation for overall quality of life was satisfactory. Concurrent validity with the SF‐36 and EQ‐5D was good (range of Spearman correlation coefficients −0.43 to −0.76). Conclusions This study resulted in a questionnaire that is appropiate for use in the Dutch‐speaking population to measure quality of life among patients with a wide variety of muscle disorders. This confirms and extends data obtained in the UK, US, Italy, and Serbia. Muscle Nerve 51: 496–500, 2015