INTER RATER RELIABILITY THE NUMERIC RATING SCALE IN INDIVIDUALS WITH KNEE OSTEOARTHRITIS

Abstract

Background: Pain is one of the most commonly reported and prominent factors that are responsible for physical inactivity in patient with knee Osteoarthritis (OA). There are many measuring tools that can used in clinical practice, one of is which is the Numerical Rating Scale (NRS). The aim this study was analyzing the inter rater reliability of NRS in individuals with knee osteoarthritis. Metode: The study was planned in accordance with guidelines for reporting reliability studies. 10 participants enrolled in this study. Intra-class correlations, two-way random effects model, (ICC 2.1) with 95% confidence intervals, standard error of measurement and minimal detectable change. Result: The inter rater reliability of NRS was excellent (ICC=0.929 95% CI = 0.712 – 0.982). The correlation coefficient recorded has higher than 0.8. The average of ages 59,9 years old. Conclusion: This study had excellent inter rater reliability by excellent ICC, which means the NRS is acceptable measurement that can be used to evaluate pain.