Journal
JOURNAL OF CLINICAL EPIDEMIOLOGY
Volume 63, Issue 7, Pages 767-773Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jclinepi.2009.09.001
Keywords
Essential tremor; Health-related quality of life; Essential tremor questionnaire; QUEST; Psychometric attributes; Validation
Funding
- Carlos III Institute of Health [EPY1271/05]
Ask authors/readers for more resources
Objective: This study sought to assess the psychometric attributes of the Quality of Life in Essential Tremor Questionnaire (QUEST) by undertaking an independent validation. Study Design and Setting: This was an observational, multicenter. cross-sectional study carried out in Neurology Departments of general hospitals. The following assessments were applied: Louis Rating Scale, Clinical Assessment of Tremor, Clinical Global Impression of Severity (CGI-ET), Hospital Anxiety and Depression Scale (HADS), EQ-5D, and QUEST (Spanish version). Results: One hundred and eighteen consecutive patients were included. According to the CGI-ET, most of patients had mild (42.4%) or moderate (43.2%) impact of tremor on performing daily activities. Fully computable QUEST data were 60.2%. The QUEST Summary Index (QUEST-SI) displayed marginal floor or ceiling effect. On the whole. QUEST internal consistency and reproducibility were satisfactory (Cronbach's alpha values: 0.73-0.86; QUEST-SI intraclass correlation coefficient: 0.77). Factor analysis identified eight factors (73.6% of the variance) that could be grouped into six, relatively coincident with the questionnaire's dimensions. The QUEST-SI correlated moderately with the EQ-5D index (r(S) = -0.40), HADS-Depression (r(S) = 0.39), and CGI-ET (r(S) = 0.39), and strongly with the QUEST scale for self-evaluation of tremor severity (r(S) = 0.63). The standard error of measurement was 8.00. Conclusion: Apart from a substantial problem of acceptability, most of the tested psychometric attributes of the QUEST resulted satisfactory. (C) 2010 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available