Measurement of health-related quality of life with the Dutch translated Aberdeen Varicose Vein Questionnaire before and after treatment.

OBJECTIVE: This clinical trial evaluated the use of the Dutch translated Aberdeen Varicose Vein Questionnaire (AVVQ) and SF-36 before and after treatment in patients with clinical-severity classes 1-6 venous disease of the lower limb. METHODS: A total of 145 patients with symptomatic venous disease of the leg were included. Numbers of patients were evenly distributed among the six clinical-severity classes 1-6 (clinical, aetiology, anatomy and pathophysiology; CEAP). Patients completed two preoperative AVVQ questionnaires and one short-form health survey with 36 items (SF-36) questionnaire to evaluate test-re-test reliability of the AVVQ. Patients completed one postoperative AVVQ and SF-36 to evaluate the effect of treatment. RESULTS: The test (99%) and re-test responses (97%) of the AVVQ were sufficient. Internal consistency of the Dutch translated AVVQ showed a Cronbach's alpha of 0.76. Correlation of test and re-test of the AVVQ was high (rho=0.86, P<0.001). A significant negative association, by Spearman's correlation coefficient, was found between the preoperative baseline Dutch translated AVVQ score and all eight domains of the preoperative SF-36 (P<0.001). These significant associations were also found in the postoperative scores. The mean preoperative AVVQ score of 19.5 (SD 11.8) and mean postoperative AVVQ score of 16.1 (SD 12.0) differed significantly (P<0.01). Analysis of three subgroups of clinical-severity classes (C1-2, C3-4 and C5-6) showed significant score changes before and after surgery (P<0.01). Preoperative and postoperative SF-36 scores were not significantly different. CONCLUSIONS: This study established the use of the Dutch translated AVVQ as a valid, health-related quality of life (QOL) questionnaire for measuring QOL before and after treatment in patients with clinical-severity classes 1-6 venous disease of the leg.

Reliability and validity of the Dutch translated Aberdeen Varicose Vein Questionnaire.

OBJECTIVE: To evaluate reliability and validity of the Dutch translated Aberdeen Varicose Vein Questionnaire (AVVQ) for measuring health related quality of life (HR-QOL) in patients with venous disease in the lower limb. METHODS: The AVVQ consists of 13 questions related varicose veins. This study assessed feasibility, reliability and validity of the Dutch translated AVVQ in a sample of 145 patients with venous disease of the leg. Test and retest of the Dutch translated AVVQ were performed within a 2 week interval. RESULTS: There was a high test (99%) and retest (97%) response. Feasibility; AVVQ showed few missing answers (0.6%) and non-unique answers (0.2%). Regarding internal consistency; Cronbach's alpha exceeded 0.7 indicating a high level of concordance between the AVVQ questions (alpha=0.76). Test-retest reliability; Spearman's rho showed a significant strong association between test and retest scores (rho=0.87). Discriminative validity; AVVQ score was able to differentiate between subgroups of patients with different severity of venous disease according to the CEAP classification (Mann-Whitney U test, p<0.01). CONCLUSIONS: This study supports applications of the Dutch AVVQ in HR-QOL measurement in patients with venous disease in the Netherlands and the Flemish speaking part of Belgium.