الفهرس 
Title : Validity and reliability of arabic version of kujala to measure patellofemoral pain
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Abstract
Background: Patellofemoral pain (PFP) has a debilitating effect on sufferers, daily lives by reducing their ability to perform sporting and work related activities pain free. The KujalaPatellofemoral Disorder Score (KPs) was particularly designed and developed for the assessment of patients having anterior knee pain as well as patellofemoral conditions. Purpose: The purpose of the study were to culturally translate and validate the Arabic version of KujalaPatellofemoral Disorder Score (KPS) (and evaluate the test-retest reliability, internal consistency, construct validity ceiling or floor effects of this instruments) in patients with PFP to measure the physical function and to ensure better care delivery. Subject and Methods: Two expert panels (each consists of nine experts) and 46 patients with Patellofemoral pain (PFP) aged from 18 to 60 years old participated in this study. Forward translation, development of preliminary initially translated version, backward translation, and development of the pre-final version and testing of pre-final version using experts then testing of the final version on patients were done. Clarity index, expert proportion of clearance, index of content validity, expert proportion of relevance, descriptive statistics, missed item index, time taken to answer the scale, Cronbach{u2019}s coefficient alpha and Spearman{u2019}s rank correlation coefficients were used for statistical analysis