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ORIGINAL PAPER
Reliability and minimal detectable change of the Step Test in patients with knee osteoarthritis
1
Graduate School of Health Sciences, Dokuz Eylul University, Balçova-Izmir, Turkey
2
School of Physical Therapy and Rehabilitation, Dokuz Eylul University, Balçova-Izmir, Turkey
3
Department of Orthopaedics and Traumatology, School of Medicine, Dokuz Eylul University, Balçova-Izmir, Turkey
Submission date: 2020-06-10
Acceptance date: 2020-07-08
Publication date: 2022-03-29
Physiother Quart. 2022;30(1):14-17
KEYWORDS
TOPICS
ABSTRACT
Introduction:
The study aim was to evaluate the test-retest reliability and minimal detectable change of the Step Test in patients with knee osteoarthritis.
Methods:
The intraclass correlation coefficient was used to assess the test-retest reliability of the Step Test. The minimal detectable change with 95% confidence interval (MDC95) was calculated to determine the true change. The inclusion criteria involved a diagnosis of knee osteoarthritis and age of ≥ 40 years.
Results:
Thirty-eight participants who met the inclusion criteria were investigated. Seven were male and the mean age equalled 61.23 ± 9.31 years. Three patients had radiographic findings indicative of Kellgren-Lawrence grade II, 10 of grade III, and 25 of grade IV. The Step Test presented excellent test-retest reliability. The intraclass correlation coefficient was 0.97, standard error of the mean was 0.46, and the MDC95 was 1.27.
Conclusions:
The Step Test is a reliable outcome measurement for the assessment of balance in patients with knee osteoarthritis, and it showed excellent test-retest reliability in these patients. The test may assist clinicians and researchers in evaluating balance and planning rehabilitation in patients with knee osteoarthritis.
The study aim was to evaluate the test-retest reliability and minimal detectable change of the Step Test in patients with knee osteoarthritis.
Methods:
The intraclass correlation coefficient was used to assess the test-retest reliability of the Step Test. The minimal detectable change with 95% confidence interval (MDC95) was calculated to determine the true change. The inclusion criteria involved a diagnosis of knee osteoarthritis and age of ≥ 40 years.
Results:
Thirty-eight participants who met the inclusion criteria were investigated. Seven were male and the mean age equalled 61.23 ± 9.31 years. Three patients had radiographic findings indicative of Kellgren-Lawrence grade II, 10 of grade III, and 25 of grade IV. The Step Test presented excellent test-retest reliability. The intraclass correlation coefficient was 0.97, standard error of the mean was 0.46, and the MDC95 was 1.27.
Conclusions:
The Step Test is a reliable outcome measurement for the assessment of balance in patients with knee osteoarthritis, and it showed excellent test-retest reliability in these patients. The test may assist clinicians and researchers in evaluating balance and planning rehabilitation in patients with knee osteoarthritis.
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