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J Orthop Sports Phys Ther. 2011 Mar;41(3):180-90. doi: 10.2519/jospt.2011.3354. Epub 2011 Feb 2.

Cross-cultural adaptation and validation of the VISA-P questionnaire for German-speaking patients with patellar tendinopathy.

Author information

1
Institute for Sports Medicine, Frankfurt, Germany. lohrer@smi-frankfurt.de

Erratum in

  • J Orthop Sports Phys Ther. 2013 Sep;43(9):679.

Abstract

STUDY DESIGN:

Clinical measurement study.

OBJECTIVES:

To cross-culturally adapt and validate the Victorian Institute of Sports Assessment Patellar Tendinopathy Questionnaire (VISA-P) for German-speaking patients.

BACKGROUND:

Like most questionnaires, the VISA-P was developed for English-speaking patients. There is a need to adapt the scale for German-speaking patients and thereby add to the total body of psychometric evidence relating to this instrument.

METHODS:

The VISA-P questionnaire was translated and cross-culturally adapted into German (VISA-P-G) in 6 steps: translation, synthesis, back translation, expert committee review, pretesting, and advisory committee appraisal. The psychometric properties of the VISA-P-G were determined using 23 patients with patellar tendinopathy and 57 active healthy persons (32 sport students and 25 basketball players). Reliability was evaluated by applying the questionnaire twice within a week to all 80 participants. Known group validity was calculated using a 1-way analysis of variance. Additionally, VISA-P-G results were correlated with the Blazina classification system for patellar tendinopathy, using the Spearman rank correlation coefficient. VISA-P-G ratings from the present study groups were further compared with respective data published in the original English, Dutch, and Swedish versions by a 2-sample t test. Internal consistency for the individual items of the questionnaire was determined within the patient group using a Cronbach alpha.

RESULTS:

Test-retest revealed excellent reliability for the patient and the asymptomatic control group (ICC = 0.88 and 0.87, respectively). Internal consistency for the patients was 0.88. Concurrent validity was almost perfect (ρ = -0.81; P<.001).

CONCLUSION:

The VISA-P-G is a reliable and valid questionnaire for the self-assessment of pain, symptoms, and function in German-speaking patients with patellar tendinopathy. Its psychometric properties are comparable with the original English and international adaptations (Swedish, Dutch, and Italian).

PMID:
21289458
DOI:
10.2519/jospt.2011.3354
[Indexed for MEDLINE]

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