title: Cross-cultural adaptation of VISA-P score for patellar tendinopathy in Turkish population.
abstract: OBJECTIVE
  VISA-P questionnaire assesses to severity of symptoms and treatment effects in athletes with patellar tendinopathy. The purpose of this study was to translated VISA-P questionnaire into Turkish language and to determine its validity and reliability.
  
  
  METHODS
  The English version of VISA-P questionnaire was translated into Turkish according to the internationally recommended guidelines. Test-retest reliability was determined on 89 participants with time interval 24 h. To determine validity of Turkish VISA-P, 31 (17 male, 14 female) healthy students, 34 (20 male, 14 female) patients with patellar tendinopathy (diagnosed by physical examination and ultrasonography) and 24 (16 male, 8 female) volleyball players (at risk populations) were completed VISA-P-Tr. Internal consistency was determined with Cronbach's alpha. Intraclass correlation coefficients (ICCs) were calculated to analyse test-retest reliability. To assessment of discrimination, VISA-P-Tr scores compared all groups using the Mann-Whitney-U test.
  
  
  RESULTS
  The VISA-P-Tr questionnaire showed good test-retest reliability (The Cronbach's alpha was 0.79 and 0.78 respectively and ICC was 0.96). The VISA-P-Tr score (mean ± SD) were 93.7 ± 8.9 and 94.0 ± 8.1 for healthy students, 81.1 ± 13.7 and 80.7 ± 13.4 for volleyball players, 58.8 ± 12.1 and 58.5 ± 11.0 for athletes with patellar tendinopathy.
  
  
  CONCLUSIONS
  The translated Turkish version of VISA-P has good internal consistency and good reliability and validity. Therefore VISA-P-Tr is useful to evaluate symptoms and follow the treatment effect in athletes with patellar tendinopathy.
authors.affiliation: Sports Medicine Department, School of Medicine, Ankara University, 06590 Cebeci, Ankara, Turkey.
authors.forename: Mehmet Mesut
authors.initials: MM
authors.lastname: Çelebi
authors.affiliation: Biostatistics Department, School of Medicine, Ankara University, 06590 Cebeci, Ankara, Turkey.
authors.forename: Serdal Kenan
authors.initials: SK
authors.lastname: Köse
authors.affiliation: Radiology Department, School of Medicine, Ankara University, 06590 Cebeci, Ankara, Turkey.
authors.forename: Zehra
authors.initials: Z
authors.lastname: Akkaya
authors.affiliation: Sports Medicine Department, School of Medicine, Ankara University, 06590 Cebeci, Ankara, Turkey.
authors.forename: Ali Murat
authors.initials: AM
authors.lastname: Zergeroglu
keywords: Patellar tendinopathy; Reliability; VISA-P-Tr; Validity