Skip to main content
main-content

01.12.2012 | Research | Ausgabe 1/2012 Open Access

Health and Quality of Life Outcomes 1/2012

Psychometric properties of the disease-specific health-related quality of life instrument VascuQoL in a Swedish setting

Zeitschrift:
Health and Quality of Life Outcomes > Ausgabe 1/2012
Autoren:
Joakim Nordanstig, Jan Karlsson, Monica Pettersson, Christine Wann-Hansson
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​1477-7525-10-45) contains supplementary material, which is available to authorized users.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

JN and C W-H designed the study and collected the data. JN performed most statistical analysis, and JN and C W-H participated in interpretation of data and writing of the manuscript. JK performed the MTMI statistical analysis, took an integral part in analysing and interpretation of data and also in writing of the manuscript. MP participated in analysing and interpretation of data and writing of the manuscript. All authors read and approved the final manuscript.

Abstract

Background

Traditional outcome measures in peripheral arterial disease (PAD) provide insufficient information regarding patient benefit. It has therefore been suggested to add patient-reported outcome measures. The main aim of this study was to validate the Swedish Vascular Quality of Life questionnaire (VascuQoL) version, a patient-reported PAD-specific health-related quality of life (HRQoL) instrument.

Methods

Two-hundred PAD patients were consecutively recruited from two university hospitals. Out of the 200 subjects, 129 had intermittent claudication and 71 had critical limb ischemia. Mean age was 70 ± 9 y and 57% of the participants were male. All patients completed SF-36 and VascuQoL at the vascular outpatient clinic, when evaluated for invasive treatment. Risk factors and physiological parameters were registered. Construct validity was tested by correlation analysis versus SF-36 and was also assessed with multitrait/multi-item scaling analysis (MTMI). Sensitivity analysis regarding disease severity identification was performed. Reliability was assessed with Cronbach's alpha and responsiveness by standardized response mean (SRM) calculations.

Results

Significant correlations were demonstrated between relevant subscales of VascuQoL and SF-36. MTMI showed acceptable construct validity, but some scaling-errors. VascuQoL significantly (p < 0.001) discriminated claudicants from critical limb ischemia patients. Cronbach's alpha was 0.94 and SRM 1.02 (sum score).

Conclusions

The Swedish version of VascuQoL is valid and quantifies central aspects of HRQoL in PAD patients. Sensitivity analysis showed high ability to differentiate between disease severity and SRM illustrated excellent responsiveness. The relative abundance of items however makes use in the everyday clinical setting somewhat difficult.
Zusatzmaterial
Authors’ original file for figure 1
12955_2012_945_MOESM1_ESM.pdf
Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 1/2012

Health and Quality of Life Outcomes 1/2012 Zur Ausgabe