Abstract
Background: Stair climbing is the task first affected in patients with knee osteoarthritis (OA); therefore, the precise measurement of time required to climb stairs is important to identify mobility limitations, particularly in the early phase of knee OA. Research question: This study aimed to examine the test-retest reliability, measurement error, and concurrent validity of the stopwatch-based stair-climb test (SCT) in adults with pre-radiographic to mild knee OA. Methods: Fifty-nine participants (mean age, 59.1 [range, 50–69] years; 72.9% female) with Kellgren and Lawrence grade ≤2 disease underwent an 11-step SCT (11-SCT) in accordance with the Osteoarthritis Research Society International recommended method while wearing pressure sensor-mounted standard shoes that is used as a gold standard procedure. Test-retest reliability, measurement errors, and the concurrent validity of the stopwatch-based 11-SCT were evaluated. Results: The test-retest reliability of the stopwatch-based 11-SCT was excellent (intra-class correlation coefficient1,1 [ICC1,1], 0.952; 95% confidence interval [CI], 0.560 to 0.985; p < 0.001) and the minimal detectable change95 was 0.102 s. Concurrent validity was excellent (ICC2,1: 0.957; 95% CI: 0.661 to 0.986; p < 0.001). Significance: The stopwatch-based 11-SCT had high test-retest reliability and high concurrent validity, which justify its clinical use for identifying mobility limitations in individuals with pre-radiographic to mild knee OA. A difference of 0.2 s in the stopwatch-based 11-SCT time would be considered a true difference beyond a 95% measurement error.
| Original language | English |
|---|---|
| Pages (from-to) | 335-339 |
| Number of pages | 5 |
| Journal | Gait and Posture |
| Volume | 68 |
| DOIs | |
| Publication status | Published - 2019 Feb 1 |
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Keywords
- Bland-Altman plot
- Knee osteoarthritis
- Stair climb test
- Validity
ASJC Scopus subject areas
- Biophysics
- Orthopedics and Sports Medicine
- Rehabilitation
Cite this
Concurrent validity and measurement error of stair climb test in people with pre-radiographic to mild knee osteoarthritis. / Iijima, Hirotaka; Shimoura, Kanako; Eguchi, Ryo; Aoyama, Tomoki; Takahashi, Masaki.
In: Gait and Posture, Vol. 68, 01.02.2019, p. 335-339.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Concurrent validity and measurement error of stair climb test in people with pre-radiographic to mild knee osteoarthritis
AU - Iijima, Hirotaka
AU - Shimoura, Kanako
AU - Eguchi, Ryo
AU - Aoyama, Tomoki
AU - Takahashi, Masaki
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Background: Stair climbing is the task first affected in patients with knee osteoarthritis (OA); therefore, the precise measurement of time required to climb stairs is important to identify mobility limitations, particularly in the early phase of knee OA. Research question: This study aimed to examine the test-retest reliability, measurement error, and concurrent validity of the stopwatch-based stair-climb test (SCT) in adults with pre-radiographic to mild knee OA. Methods: Fifty-nine participants (mean age, 59.1 [range, 50–69] years; 72.9% female) with Kellgren and Lawrence grade ≤2 disease underwent an 11-step SCT (11-SCT) in accordance with the Osteoarthritis Research Society International recommended method while wearing pressure sensor-mounted standard shoes that is used as a gold standard procedure. Test-retest reliability, measurement errors, and the concurrent validity of the stopwatch-based 11-SCT were evaluated. Results: The test-retest reliability of the stopwatch-based 11-SCT was excellent (intra-class correlation coefficient1,1 [ICC1,1], 0.952; 95% confidence interval [CI], 0.560 to 0.985; p < 0.001) and the minimal detectable change95 was 0.102 s. Concurrent validity was excellent (ICC2,1: 0.957; 95% CI: 0.661 to 0.986; p < 0.001). Significance: The stopwatch-based 11-SCT had high test-retest reliability and high concurrent validity, which justify its clinical use for identifying mobility limitations in individuals with pre-radiographic to mild knee OA. A difference of 0.2 s in the stopwatch-based 11-SCT time would be considered a true difference beyond a 95% measurement error.
AB - Background: Stair climbing is the task first affected in patients with knee osteoarthritis (OA); therefore, the precise measurement of time required to climb stairs is important to identify mobility limitations, particularly in the early phase of knee OA. Research question: This study aimed to examine the test-retest reliability, measurement error, and concurrent validity of the stopwatch-based stair-climb test (SCT) in adults with pre-radiographic to mild knee OA. Methods: Fifty-nine participants (mean age, 59.1 [range, 50–69] years; 72.9% female) with Kellgren and Lawrence grade ≤2 disease underwent an 11-step SCT (11-SCT) in accordance with the Osteoarthritis Research Society International recommended method while wearing pressure sensor-mounted standard shoes that is used as a gold standard procedure. Test-retest reliability, measurement errors, and the concurrent validity of the stopwatch-based 11-SCT were evaluated. Results: The test-retest reliability of the stopwatch-based 11-SCT was excellent (intra-class correlation coefficient1,1 [ICC1,1], 0.952; 95% confidence interval [CI], 0.560 to 0.985; p < 0.001) and the minimal detectable change95 was 0.102 s. Concurrent validity was excellent (ICC2,1: 0.957; 95% CI: 0.661 to 0.986; p < 0.001). Significance: The stopwatch-based 11-SCT had high test-retest reliability and high concurrent validity, which justify its clinical use for identifying mobility limitations in individuals with pre-radiographic to mild knee OA. A difference of 0.2 s in the stopwatch-based 11-SCT time would be considered a true difference beyond a 95% measurement error.
KW - Bland-Altman plot
KW - Knee osteoarthritis
KW - Stair climb test
KW - Validity
UR - http://www.scopus.com/inward/record.url?scp=85058567397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85058567397&partnerID=8YFLogxK
U2 - 10.1016/j.gaitpost.2018.12.014
DO - 10.1016/j.gaitpost.2018.12.014
M3 - Article
VL - 68
SP - 335
EP - 339
JO - Gait and Posture
JF - Gait and Posture
SN - 0966-6362
ER -