Relationship between scores from the Knee Outcome Survey and a single assessment numerical rating in patients with patellofemoral pain

Objective: To determine the relationship between patient-reported single numeric ratings and actual scores obtained from a validated instrument, the Knee Outcome Survey (KOS). Background: Patient-reported outcome (PRO) measures are an important component of patient management. Information obtained from PRO measures can be used to prioritize goal setting, assist with clinical decision-making, provide evidence for effectiveness of interventions, monitor progress, and assess organizational or clinician performance. Methods: Scores from the KOS activity of daily living (ADL) and Sports subscales completed at the time of initial examination of patients with patellofemoral pain (n = 29) were retrospectively analyzed and compared to a single assessment numerical rating. Results: Bi-variate Pearson product correlation was used to determine association between the KOS-ADL and KOS-Sports with respective single assessment numerical ratings. A high correlation was observed between the KOS-ADL (0.85, p < 0.01) and KOS...