Related Experiment Video
Updated: Jul 21, 2025
Author Spotlight: Fu's Subcutaneous Needling for Knee Osteoarthritis Pain
Published on: March 24, 2023
The test-retest reliability and concurrent validity of performance-based task tests in patients with knee
Hacı Ahmet Yarar1, Selnur Narin2, Mehmet Erduran3
1Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey; Department of Orthopedic Physiotherapy, Faculty of Physical Therapy and Rehabilitation, Dokuz Eylul University, Izmir, Turkey.
Background:
The measurement tool used for an accurate balance assessment should produce valid and reliable results in the population in which it is used.
Objectives:
To examine whether two performance-based task tests are a reliable and valid measurement test to assess balance in patients with early and advanced knee osteoarthritis (KO).
Design:
Reliability and concurrent validity research.
Method:
Test-retest reliability by calculating the intraclass correlation coefficient (ICC) between the first and second trial periods of performance-based task tests (Alternate Step Test & Pen Pick up Test); their correlations with the Timed Up and Go Test (TUGT) were calculated and their concurrent validity in balance assessment were examined.
Results:
A total of 100 patients (75% women, 25% men, mean 59 ± 10 years) with KO, 50 early (54 ± 7 years, 34 women, 16 men) and 50 advanced (64 ± 9 years, 41 women, 9 men), participated in the study. The ICC values for the Alternate Step Test (AST) and Pen Pick up Test (PPT) in patients with early KO are 0.881 (0.747-0.939, 95% confidence intervals) and 0.815 (0.689-0.892, 95% confidence intervals), respectively, while it is 0.852 (0.752-0.913, 95% confidence intervals) and 0.861 (0.756-0.922, 95% confidence intervals) in patients with advanced KO. Pearson correlation coefficient between AST & PPT times and TUGT time in patients with early and advanced KO was in the range of 0.535-0.746 (p < 0.01).
Conclusions:
Both task tests are reliable and valid clinical measurement tests that can be used to assess balance in patients with both early and advanced KO.
More Related Videos
07:22Glycemic Impact on Knee Osteoarthritis Symptoms on Physical, Radiographic, and Inflammatory Markers among Individuals Aged 50 and Over with Diabetes
Published on: March 7, 2025
09:10The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation
Published on: July 22, 2019