ASSESSMENT OF IN VIVO MECHANICAL MUSCLE FUNCTION IN PATIENTS WITH OSTEOARTHRITIS (OA) OF THE HIP; RELIABILITY

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

Abstract

INTRODUCTION

Muscle function in patients with hip OA is not well-studied. We established a new setup of tests in order to monitor patients before and after surgery with total hip arthroplasty (THA). A test-retest protocol was designed to evaluate the reproducibility of single- and multi-joint strength and power a novel setup.

MATERIAL AND METHODS

Isokinetic contractions for both knee and hip muscles were performed. Reliability for isometric muscle contractions in vivo was recorded and evaluated by use of within subject variability (CVW-S), Spearman correlation and Limits of Agreement (LoA). Both explosive muscle force characteristics (Rate of force development) and maximal isometric force (MVC) were obtained for the affected (aff) and non-affected (n-aff) leg (only data MVC for affected side in this abstract). 20 patients, (age 55.9 ± 4.8; height 174 ± 8; BMI 27.1 ± 4.5) with unilateral hip OA participated in a test-retest after 8w at 10w post op.

 

RESULTS

 

Table 1: Patient test - retest reliability (Maximal Isometric Muscle Torque) for aff-side

AFF-leg

Test (8W)

Mean ± SD

  • (Nmkg-1)

Test (10W)

Mean ± SD

  • (Nmkg-1)

Δmean

  • (Nmkg-1)

 

CVws

 

Spearman

± SE

 

LoA

 

Knee EXT

1.32 ± 0.38

1.41 ± 0.35

-0.09 ± 0.16

-6.5 %

0.88 ± 0.05

-0.40 : 0.20

Knee FLX

0.63 ± 0.23

0.65 ± 0.17

-0.02 ± 0.10

-3.8 %

0.87 ± 0.05

-0.22 : 0.17

Hip ADD

1.28 ± 0.32

1.34 ± 0.37

-0.07 ± 0.12

-5.1 %

0.93 ± 0.03

-0.29 : 0.16

Hip ABD

1.35 ± 0.28

1.47 ± 0.35

-0.11 ± 0.14

-8.0 %

0.84 ± 0.07

-0.39 : 0.16

Hip EXT

1.86 ± 0.44

2.07 ± 0.57

-0.20 ± 0.24

-9.9 %

0.82 ± 0.07

-0.67 : 0.26

Hip FLX

1.09 ± 0.31

1.23 ± 0.33

-0.15 ± 0.13

-12.8 %

0.82 ± 0.06

-0.40 : 0.11

 

Test-retest showed good CV's for all except hip flexion.

 

CONCLUSIONS

Our novel setup of muscle tests showed overall good CV's, which is promising for further studies on the patient group.

Original languageEnglish
Title of host publicationProceedings Årsmøde 2009 Dansk Ortopædisk Selskab
Number of pages1
Publication date2009
Publication statusPublished - 2009
EventDansk Ortopædisk Selskab - Odense, Denmark
Duration: 29. Apr 20091. May 2009

Conference

ConferenceDansk Ortopædisk Selskab
CountryDenmark
CityOdense
Period29/04/200901/05/2009

Keywords

  • Reproducibility
  • Muscle Strength
  • patient-related assessment
  • rehabilitation

Cite this

@inbook{7dbf8f801df611deae62000ea68e967b,
title = "ASSESSMENT OF IN VIVO MECHANICAL MUSCLE FUNCTION IN PATIENTS WITH OSTEOARTHRITIS (OA) OF THE HIP; RELIABILITY",
abstract = "INTRODUCTIONMuscle function in patients with hip OA is not well-studied. We established a new setup of tests in order to monitor patients before and after surgery with total hip arthroplasty (THA). A test-retest protocol was designed to evaluate the reproducibility of single- and multi-joint strength and power a novel setup. MATERIAL AND METHODSIsokinetic contractions for both knee and hip muscles were performed. Reliability for isometric muscle contractions in vivo was recorded and evaluated by use of within subject variability (CVW-S), Spearman correlation and Limits of Agreement (LoA). Both explosive muscle force characteristics (Rate of force development) and maximal isometric force (MVC) were obtained for the affected (aff) and non-affected (n-aff) leg (only data MVC for affected side in this abstract). 20 patients, (age 55.9 ± 4.8; height 174 ± 8; BMI 27.1 ± 4.5) with unilateral hip OA participated in a test-retest after 8w at 10w post op.  RESULTS Table 1: Patient test - retest reliability (Maximal Isometric Muscle Torque) for aff-sideAFF-legTest (8W)Mean ± SD(Nmkg-1)Test (10W)Mean ± SD(Nmkg-1)Δmean(Nmkg-1) CVws Spearman± SE LoA Knee EXT1.32 ± 0.381.41 ± 0.35-0.09 ± 0.16-6.5 {\%}0.88 ± 0.05-0.40 : 0.20Knee FLX0.63 ± 0.230.65 ± 0.17-0.02 ± 0.10-3.8 {\%}0.87 ± 0.05-0.22 : 0.17Hip ADD1.28 ± 0.321.34 ± 0.37-0.07 ± 0.12-5.1 {\%}0.93 ± 0.03-0.29 : 0.16Hip ABD1.35 ± 0.281.47 ± 0.35-0.11 ± 0.14-8.0 {\%}0.84 ± 0.07-0.39 : 0.16Hip EXT1.86 ± 0.442.07 ± 0.57-0.20 ± 0.24-9.9 {\%}0.82 ± 0.07-0.67 : 0.26Hip FLX1.09 ± 0.311.23 ± 0.33-0.15 ± 0.13-12.8 {\%}0.82 ± 0.06-0.40 : 0.11 Test-retest showed good CV's for all except hip flexion.  CONCLUSIONSOur novel setup of muscle tests showed overall good CV's, which is promising for further studies on the patient group.",
keywords = "Reproducerbarhed, Muskel styrke, patient relateret vurdering, rehabilitering, Reproducibility, Muscle Strength, patient-related assessment, rehabilitation",
author = "Carsten Jensen and S{\o}ren Overgaard and Per Aagaard",
year = "2009",
language = "English",
booktitle = "Proceedings {\AA}rsm{\o}de 2009 Dansk Ortop{\ae}disk Selskab",

}

Jensen, C, Overgaard, S & Aagaard, P 2009, ASSESSMENT OF IN VIVO MECHANICAL MUSCLE FUNCTION IN PATIENTS WITH OSTEOARTHRITIS (OA) OF THE HIP; RELIABILITY. in Proceedings Årsmøde 2009 Dansk Ortopædisk Selskab. Dansk Ortopædisk Selskab, Odense, Denmark, 29/04/2009.

ASSESSMENT OF IN VIVO MECHANICAL MUSCLE FUNCTION IN PATIENTS WITH OSTEOARTHRITIS (OA) OF THE HIP; RELIABILITY. / Jensen, Carsten; Overgaard, Søren; Aagaard, Per.

Proceedings Årsmøde 2009 Dansk Ortopædisk Selskab. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

TY - ABST

T1 - ASSESSMENT OF IN VIVO MECHANICAL MUSCLE FUNCTION IN PATIENTS WITH OSTEOARTHRITIS (OA) OF THE HIP; RELIABILITY

AU - Jensen, Carsten

AU - Overgaard, Søren

AU - Aagaard, Per

PY - 2009

Y1 - 2009

N2 - INTRODUCTIONMuscle function in patients with hip OA is not well-studied. We established a new setup of tests in order to monitor patients before and after surgery with total hip arthroplasty (THA). A test-retest protocol was designed to evaluate the reproducibility of single- and multi-joint strength and power a novel setup. MATERIAL AND METHODSIsokinetic contractions for both knee and hip muscles were performed. Reliability for isometric muscle contractions in vivo was recorded and evaluated by use of within subject variability (CVW-S), Spearman correlation and Limits of Agreement (LoA). Both explosive muscle force characteristics (Rate of force development) and maximal isometric force (MVC) were obtained for the affected (aff) and non-affected (n-aff) leg (only data MVC for affected side in this abstract). 20 patients, (age 55.9 ± 4.8; height 174 ± 8; BMI 27.1 ± 4.5) with unilateral hip OA participated in a test-retest after 8w at 10w post op.  RESULTS Table 1: Patient test - retest reliability (Maximal Isometric Muscle Torque) for aff-sideAFF-legTest (8W)Mean ± SD(Nmkg-1)Test (10W)Mean ± SD(Nmkg-1)Δmean(Nmkg-1) CVws Spearman± SE LoA Knee EXT1.32 ± 0.381.41 ± 0.35-0.09 ± 0.16-6.5 %0.88 ± 0.05-0.40 : 0.20Knee FLX0.63 ± 0.230.65 ± 0.17-0.02 ± 0.10-3.8 %0.87 ± 0.05-0.22 : 0.17Hip ADD1.28 ± 0.321.34 ± 0.37-0.07 ± 0.12-5.1 %0.93 ± 0.03-0.29 : 0.16Hip ABD1.35 ± 0.281.47 ± 0.35-0.11 ± 0.14-8.0 %0.84 ± 0.07-0.39 : 0.16Hip EXT1.86 ± 0.442.07 ± 0.57-0.20 ± 0.24-9.9 %0.82 ± 0.07-0.67 : 0.26Hip FLX1.09 ± 0.311.23 ± 0.33-0.15 ± 0.13-12.8 %0.82 ± 0.06-0.40 : 0.11 Test-retest showed good CV's for all except hip flexion.  CONCLUSIONSOur novel setup of muscle tests showed overall good CV's, which is promising for further studies on the patient group.

AB - INTRODUCTIONMuscle function in patients with hip OA is not well-studied. We established a new setup of tests in order to monitor patients before and after surgery with total hip arthroplasty (THA). A test-retest protocol was designed to evaluate the reproducibility of single- and multi-joint strength and power a novel setup. MATERIAL AND METHODSIsokinetic contractions for both knee and hip muscles were performed. Reliability for isometric muscle contractions in vivo was recorded and evaluated by use of within subject variability (CVW-S), Spearman correlation and Limits of Agreement (LoA). Both explosive muscle force characteristics (Rate of force development) and maximal isometric force (MVC) were obtained for the affected (aff) and non-affected (n-aff) leg (only data MVC for affected side in this abstract). 20 patients, (age 55.9 ± 4.8; height 174 ± 8; BMI 27.1 ± 4.5) with unilateral hip OA participated in a test-retest after 8w at 10w post op.  RESULTS Table 1: Patient test - retest reliability (Maximal Isometric Muscle Torque) for aff-sideAFF-legTest (8W)Mean ± SD(Nmkg-1)Test (10W)Mean ± SD(Nmkg-1)Δmean(Nmkg-1) CVws Spearman± SE LoA Knee EXT1.32 ± 0.381.41 ± 0.35-0.09 ± 0.16-6.5 %0.88 ± 0.05-0.40 : 0.20Knee FLX0.63 ± 0.230.65 ± 0.17-0.02 ± 0.10-3.8 %0.87 ± 0.05-0.22 : 0.17Hip ADD1.28 ± 0.321.34 ± 0.37-0.07 ± 0.12-5.1 %0.93 ± 0.03-0.29 : 0.16Hip ABD1.35 ± 0.281.47 ± 0.35-0.11 ± 0.14-8.0 %0.84 ± 0.07-0.39 : 0.16Hip EXT1.86 ± 0.442.07 ± 0.57-0.20 ± 0.24-9.9 %0.82 ± 0.07-0.67 : 0.26Hip FLX1.09 ± 0.311.23 ± 0.33-0.15 ± 0.13-12.8 %0.82 ± 0.06-0.40 : 0.11 Test-retest showed good CV's for all except hip flexion.  CONCLUSIONSOur novel setup of muscle tests showed overall good CV's, which is promising for further studies on the patient group.

KW - Reproducerbarhed

KW - Muskel styrke

KW - patient relateret vurdering

KW - rehabilitering

KW - Reproducibility

KW - Muscle Strength

KW - patient-related assessment

KW - rehabilitation

M3 - Conference abstract in proceedings

BT - Proceedings Årsmøde 2009 Dansk Ortopædisk Selskab

ER -