Reproducibility and validity of the DynaPort KneeTest

Lidwine B. Mokkink, Caroline B. Terwee, Rienk M.A. Van Der Slikke, Rob C. Van Lummel, Rob J. Benink, Lex M. Bouter, Henrica C.W. De Vet

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Objective. To determine the reproducibility and validity of the DynaPort KneeTest, a performance-based test that measures quality of movement of patients undergoing total knee replacement (TKR). Methods. A total of 92 patients with osteoarthritis (OA) of the knee performed the KneeTest twice on the same day; 94 healthy controls performed the KneeTest once. During the test, 29 activities were performed with accelerometers attached to the body. Relevant functional parameters were extracted from the accelerometers. A selection of parameters was used to calculate activity scores, based on the ability of parameters to discriminate between patients and controls (regression analyses). Based on internal consistency analyses (Cronbach's α), redundant activities were removed. Four cluster scores and a total KneeScore were calculated from the remaining activity scores. Reproducibility and validity of the cluster scores and the total KneeScore 2 were assessed. Results. Based on internal consistency analyses, the test was reduced to 23 activities. Inter- and intraobserver reliability using intraclass correlation coefficients were 0.90 (0.83-0.94) and 0.95 (0.83-0.98), respectively. Limits of inter- and intraobserver agreement were -8.3 to 11.3 and -4.2 to 9.0. Construct validity was confirmed by expected correlations with the Western Ontario and McMaster University Osteoarthritis Index physical functioning (0.55), Medical Outcomes Study Short Form-36 Health Survey physical functioning (0.62), and Knee Society Score function (0.64). Conclusion. The KneeTest is a useful performance-based measure for research in patients with knee OA undergoing TKR, with good reliability and validity. Further research is required to improve its usefulness for clinical practice.

Original languageEnglish
Pages (from-to)357-363
Number of pages7
JournalArthritis Care and Research
Volume53
Issue number3
DOIs
Publication statusPublished - 15 Jun 2005

Cite this

Mokkink, Lidwine B. ; Terwee, Caroline B. ; Van Der Slikke, Rienk M.A. ; Van Lummel, Rob C. ; Benink, Rob J. ; Bouter, Lex M. ; De Vet, Henrica C.W. / Reproducibility and validity of the DynaPort KneeTest. In: Arthritis Care and Research. 2005 ; Vol. 53, No. 3. pp. 357-363.
@article{bd07cdc54139432bb54986ce67deab9d,
title = "Reproducibility and validity of the DynaPort KneeTest",
abstract = "Objective. To determine the reproducibility and validity of the DynaPort KneeTest, a performance-based test that measures quality of movement of patients undergoing total knee replacement (TKR). Methods. A total of 92 patients with osteoarthritis (OA) of the knee performed the KneeTest twice on the same day; 94 healthy controls performed the KneeTest once. During the test, 29 activities were performed with accelerometers attached to the body. Relevant functional parameters were extracted from the accelerometers. A selection of parameters was used to calculate activity scores, based on the ability of parameters to discriminate between patients and controls (regression analyses). Based on internal consistency analyses (Cronbach's α), redundant activities were removed. Four cluster scores and a total KneeScore were calculated from the remaining activity scores. Reproducibility and validity of the cluster scores and the total KneeScore 2 were assessed. Results. Based on internal consistency analyses, the test was reduced to 23 activities. Inter- and intraobserver reliability using intraclass correlation coefficients were 0.90 (0.83-0.94) and 0.95 (0.83-0.98), respectively. Limits of inter- and intraobserver agreement were -8.3 to 11.3 and -4.2 to 9.0. Construct validity was confirmed by expected correlations with the Western Ontario and McMaster University Osteoarthritis Index physical functioning (0.55), Medical Outcomes Study Short Form-36 Health Survey physical functioning (0.62), and Knee Society Score function (0.64). Conclusion. The KneeTest is a useful performance-based measure for research in patients with knee OA undergoing TKR, with good reliability and validity. Further research is required to improve its usefulness for clinical practice.",
keywords = "DynaPort KneeTest, Osteoarthritis, Total knee replacement",
author = "Mokkink, {Lidwine B.} and Terwee, {Caroline B.} and {Van Der Slikke}, {Rienk M.A.} and {Van Lummel}, {Rob C.} and Benink, {Rob J.} and Bouter, {Lex M.} and {De Vet}, {Henrica C.W.}",
year = "2005",
month = "6",
day = "15",
doi = "10.1002/art.21167",
language = "English",
volume = "53",
pages = "357--363",
journal = "Arthritis Care & Research",
issn = "2151-464X",
publisher = "John Wiley and Sons Inc.",
number = "3",

}

Reproducibility and validity of the DynaPort KneeTest. / Mokkink, Lidwine B.; Terwee, Caroline B.; Van Der Slikke, Rienk M.A.; Van Lummel, Rob C.; Benink, Rob J.; Bouter, Lex M.; De Vet, Henrica C.W.

In: Arthritis Care and Research, Vol. 53, No. 3, 15.06.2005, p. 357-363.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Reproducibility and validity of the DynaPort KneeTest

AU - Mokkink, Lidwine B.

AU - Terwee, Caroline B.

AU - Van Der Slikke, Rienk M.A.

AU - Van Lummel, Rob C.

AU - Benink, Rob J.

AU - Bouter, Lex M.

AU - De Vet, Henrica C.W.

PY - 2005/6/15

Y1 - 2005/6/15

N2 - Objective. To determine the reproducibility and validity of the DynaPort KneeTest, a performance-based test that measures quality of movement of patients undergoing total knee replacement (TKR). Methods. A total of 92 patients with osteoarthritis (OA) of the knee performed the KneeTest twice on the same day; 94 healthy controls performed the KneeTest once. During the test, 29 activities were performed with accelerometers attached to the body. Relevant functional parameters were extracted from the accelerometers. A selection of parameters was used to calculate activity scores, based on the ability of parameters to discriminate between patients and controls (regression analyses). Based on internal consistency analyses (Cronbach's α), redundant activities were removed. Four cluster scores and a total KneeScore were calculated from the remaining activity scores. Reproducibility and validity of the cluster scores and the total KneeScore 2 were assessed. Results. Based on internal consistency analyses, the test was reduced to 23 activities. Inter- and intraobserver reliability using intraclass correlation coefficients were 0.90 (0.83-0.94) and 0.95 (0.83-0.98), respectively. Limits of inter- and intraobserver agreement were -8.3 to 11.3 and -4.2 to 9.0. Construct validity was confirmed by expected correlations with the Western Ontario and McMaster University Osteoarthritis Index physical functioning (0.55), Medical Outcomes Study Short Form-36 Health Survey physical functioning (0.62), and Knee Society Score function (0.64). Conclusion. The KneeTest is a useful performance-based measure for research in patients with knee OA undergoing TKR, with good reliability and validity. Further research is required to improve its usefulness for clinical practice.

AB - Objective. To determine the reproducibility and validity of the DynaPort KneeTest, a performance-based test that measures quality of movement of patients undergoing total knee replacement (TKR). Methods. A total of 92 patients with osteoarthritis (OA) of the knee performed the KneeTest twice on the same day; 94 healthy controls performed the KneeTest once. During the test, 29 activities were performed with accelerometers attached to the body. Relevant functional parameters were extracted from the accelerometers. A selection of parameters was used to calculate activity scores, based on the ability of parameters to discriminate between patients and controls (regression analyses). Based on internal consistency analyses (Cronbach's α), redundant activities were removed. Four cluster scores and a total KneeScore were calculated from the remaining activity scores. Reproducibility and validity of the cluster scores and the total KneeScore 2 were assessed. Results. Based on internal consistency analyses, the test was reduced to 23 activities. Inter- and intraobserver reliability using intraclass correlation coefficients were 0.90 (0.83-0.94) and 0.95 (0.83-0.98), respectively. Limits of inter- and intraobserver agreement were -8.3 to 11.3 and -4.2 to 9.0. Construct validity was confirmed by expected correlations with the Western Ontario and McMaster University Osteoarthritis Index physical functioning (0.55), Medical Outcomes Study Short Form-36 Health Survey physical functioning (0.62), and Knee Society Score function (0.64). Conclusion. The KneeTest is a useful performance-based measure for research in patients with knee OA undergoing TKR, with good reliability and validity. Further research is required to improve its usefulness for clinical practice.

KW - DynaPort KneeTest

KW - Osteoarthritis

KW - Total knee replacement

UR - http://www.scopus.com/inward/record.url?scp=20444389075&partnerID=8YFLogxK

U2 - 10.1002/art.21167

DO - 10.1002/art.21167

M3 - Article

VL - 53

SP - 357

EP - 363

JO - Arthritis Care & Research

JF - Arthritis Care & Research

SN - 2151-464X

IS - 3

ER -