Published online Jan 18, 2018. doi: 10.5312/wjo.v9.i1.1
Peer-review started: February 2, 2017
First decision: June 26, 2017
Revised: November 30, 2017
Accepted: December 1, 2017
Article in press: December 1, 2017
Published online: January 18, 2018
To translate the Victorian Institute of Sports Assessment-Achilles (VISA-A) questionnaire into the Dutch language (VISA-A-NL), and to assess its reliability, validity, and applicability to non-athletes.
After translation according to a forward-backward protocol, 101 patients with complaints of Achilles tendinopathy were asked to fill out the VISA-A-NL at two time points together with visual analogue scale, the Foot and Ankle Outcome Score, and the Short Form-36 questionnaires. Reliability, internal consistency, construct validity, and content validity were tested.
The VISA-A-NL showed high reliability (0.97, 95%CI: 0.95-0.98). Cronbach’s alpha (internal consistency) was 0.80. It increased to 0.88 without activity domain. Correlation with other questionnaires was moderate or poorer.
The VISA-A-NL proved to be an excellent evaluation instrument for the Dutch physician. If applied to non-athletes, using a modified score (questions 1-6) should be considered.
Core tip: This manuscript shows the validity and reliability of the Dutch version of the Victorian Institute of Sports Assessment-Achilles (VISA-A) in patients with Achilles tendinopathy. The most important finding is that the athletes and non-athletes cannot be compared. The effect of treatment, when using the VISA-A score to measure outcome, is underestimated in non-athletes. If applied to non-athletes, using a modified score (questions 1-6) should be considered.