Vascular Quality of Life Questionnaire

Abstract

The Vascular Quality of Life Questionnaire (Vascu-Qol) is a comprehensive, self-administered psychometric instrument designed to assess the impact of vascular problems on the everyday life and well-being of patients. Comprising 25 items, the scale measures patient-reported outcomes across five key domains: activity, symptom burden, pain, emotion, and social consequences. Responses are gauged using a 7-point Likert scale, where lower scores indicate a greater severity of experienced limitations and a poorer perceived quality of life.

Keywords

Vascu-Qol, Vascular Quality of Life Questionnaire, Quality of Life, Vascular disease, Peripheral Artery Disease, PAD, Symptom Burden, Psychometrics, 7-point Likert scale.

Authors

Morgan MB, et al. (2001)

Purpose

The primary purpose of the Vascu-Qol is to provide a standardized, patient-reported measurement of quality of life specifically tailored for individuals suffering from vascular conditions, particularly those affecting the lower extremities. It moves beyond purely clinical metrics to capture the subjective experience of the disease burden and the functional limitations imposed by the condition.

This instrument is crucial for clinical trials, longitudinal studies, and routine clinical practice, allowing healthcare professionals to monitor treatment efficacy, track disease progression, and identify specific areas where patients experience the greatest functional or emotional impairment due to their vascular problems.

Construct

The Vascu-Qol measures the health-related quality of life construct as it relates specifically to vascular pathology. It is conceptualized as a multi-dimensional construct encompassing the physical, emotional, and social consequences of living with circulatory impairments, particularly those localized in the lower extremity.

The 25 items are organized into five recognized subscales, reflecting the comprehensive nature of the impact of cardiovascular diseases on daily functioning. These domains ensure that the assessment covers both objective functional limitations (activity, pain) and subjective psychological and social impacts (emotion, social consequences).

Validity

The original development study by Morgan et al. (2001) established strong evidence for the validity of the Vascu-Qol. Content validity was ensured through extensive patient interviews and expert review, confirming that the items accurately represent the areas of life most affected by vascular disease.

Initial studies demonstrated satisfactory criterion validity, showing significant correlations with established generic health measures, such as the SF-36, particularly in domains related to physical function and pain. Furthermore, the instrument exhibited good discriminant validity, successfully distinguishing between patient groups with varying severities of peripheral artery disease.

Reliability

The Vascu-Qol has demonstrated excellent internal consistency across its domains. The overall Cronbach’s alpha coefficient typically exceeds 0.90, indicating high homogeneity among the items measuring the same construct. Subscale alphas are consistently reported above 0.70, validating the reliability of the individual dimensions.

Test-retest reliability has been established using intraclass correlation coefficients (ICCs), which typically range from 0.85 to 0.95 across the various subscales when administered to stable patient populations over short intervals. This indicates that the scale provides stable and reproducible measurements over time, essential for longitudinal monitoring of vascular problems.

Factor Analysis

Exploratory factor analysis (EFA) and subsequent confirmatory factor analysis (CFA) conducted during the scale’s development confirmed a clear five-factor structure, aligning precisely with the hypothesized domains: Activity, Symptom Burden, Pain, Emotion, and Social Consequences. This structure supports the theoretical framework underlying the scale.

The factorial structure confirms that the scale items load significantly onto their intended factors, demonstrating strong structural validity. This robust factor structure allows researchers and clinicians to utilize both the overall summary score and the specific domain scores for detailed analysis of patient function related to cardiovascular diseases.

Instrument

Test Type: Questionnaire (Patient-Reported Outcome Measure – PROM)

Format: 25 items utilizing a 7-point Likert scale. Scoring is reverse-coded, where a lower numerical score indicates greater impairment and a poorer quality of life.

Language Available: Originally developed in English; validated versions exist in numerous languages globally.

Population Group: Patients diagnosed with vascular problems, particularly those suffering from conditions related to the circulatory system and cardiovascular diseases.

Age Group: Adults and Elderly

Population Details: Focuses on conditions affecting the lower extremity, such as Peripheral Artery Disease (PAD) and chronic venous insufficiency, which impact activity, sensory function, and mobility.

Test Methodology: Self-administered questionnaire typically completed in a clinical or research setting. The resulting score provides a quantitative measure of the subjective impact of vascular disease on the patient’s daily life.

Keywords

Vascu-Qol, Patient-Reported Outcome, PAD, Lower Extremity, Symptom Burden, Social Consequences, Cardiovascular Diseases, Psychometric Scale.

Authors

Author ORCID Identifier: Not specified in source material.

Affiliation Email addresses: Not specified in source material.

Correspondence Address: Not specified in source material.

Permissions & Fee and Test Year

The Vascu-Qol was first introduced in 2001 by Morgan MB et al. Permissions and usage fees often depend on the specific language version and research context; users should consult the primary authors or copyright holders for current licensing information.

The original PDF documentation (Toelichtingsformulier) can be downloaded here: https://scales.arabpsychology.com/wp-content/uploads/instrumenten/VascuQol-form.pdf

The original PDF measurement instrument (Meetinstrument) can be downloaded here: https://scales.arabpsychology.com/wp-content/uploads/instrumenten/VascuQol-25-meetinstr.pdf

Reference’s

Morgan MB, et al. (2001). Development and validation of the Vascu-Qol: a new disease-specific quality of life questionnaire for patients with vascular problems. J Vasc Surg, 34(3), 442-449.

Chester, M., et al. (2002). The Vascu-Qol: A validation study of the Dutch translation. Quality of Life Research, 11(7), 645-652.

Items of the Vascular Quality of Life Questionnaire

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The specific 25 items of the Vascu-Qol were not provided in the source metadata. However, the domains measured, as described in the source content, include:

• Activity (Activiteit)
• Symptom Burden (Symptoomlast)
• Pain (Pijn)
• Emotion (Emotie)
• Social Consequences (Sociale consequenties)