Patellar tendinopathy is an injury related to structural damage in the distal and proximal regions of the patellar tendon. 22 This injury generally occurs in individuals who engage in sports and recreational activities that require sudden acceleration and deceleration, and in athletes who perform repetitive movements such as jumping, climbing, and kicking. These activities are known to have the potential to overload the extensor apparatus of the knee. 7,22 Lian et al, 13 in a study that included 612 athletes from different sports, reported a prevalence of patellar tendinopathy of 14.2%. This injury is twice as prevalent in men as it is in women 11 and keeps 33% of athletes away from their sports activities for more than 6 months, forcing 50% of these athletes into early retirement.2 Furthermore, it affects approximately 45% of volleyball athletes, as this is a sport with actions that involve several risk factors for patellar tendinopathy.
11Due to the high prevalence of patellar tendinopathy in athletes, early diagnosis and treatment are essential to avoid extended periods away from sports activities. Clinical instruments to determine the severity and the level of disability resulting from patellar tendinopathy are highly useful because they can assess the evolution of the condition and serve as
T T BACKGROUND:It is important to objectively measure symptoms and functional limitations related to patellar tendinopathy using outcome measures that have been validated in the language of the target population. Cross-cultural adaptations are also useful to enhance the understanding of the measurement properties of an assessment tool, regardless of the target language.
T T METHODS:The VISA-P questionnaire was translated into Brazilian Portuguese, culturally adapted, and titled VISA-P Brazil. It was then administered on 2 occasions with a 24-to 48-hour interval between them, and a third time after a month of physical therapy treatment. The following measurement properties were analyzed: internal consistency, test-retest reliability, agreement, construct validity, floor and ceiling effects, and responsiveness.
T T RESULTS:The VISA-P Brazil had high internal consistency (Cronbach α = .76; if item deleted, Cronbach α = .69-.78), excellent reliability and agreement (intraclass correlation coefficient = 0.91; 95% confidence interval: 0.85, 0.95; standard error of measurement, 5.2 points; minimal detectable change at the 90% confidence level, 12.2 points), and good construct validity (Pearson r = 0.60 compared to Lysholm). No ceiling and floor effects were detected for the VISA-P Brazil, and the responsiveness, based on 32 patients receiving physical therapy intervention for 1 month, demonstrated a large effect size of 0.97 (95% confidence interval: 0.68, 1.25).
T T CONCLUSION:The VISA-P Brazil is a reproducible and responsive tool and can be used in clinical practice and research to assess the severity of pain and disability of patients with patellar tendinopathy.