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Table 6 Reliability of neck strength testing (n = 20)

From: A clinical test to assess isometric cervical strength in chronic whiplash associated disorder (WAD): a reliability study

 

ICC

95% CI

SEM

MDC

MDC %

Intra rater

Flex

0.871

.673—.949

0.393

1.09

35.83

Ext

0.830

.570—.933

1.071

2.97

47.42

RSF

0.843

.603—.938

0.526

1.46

40.95

LSF

0.713

.276—.887

1.367

3.79

89.37

RR

0.882

.702—.953

0.349

0.97

33.13

LR

0.814

.530—.926

0.556

1.54

51.03

Total

0.908

.769—.964

1.973

5.47

23.74

Inter rater

Flex

0.870

.670—.948

0.453

1.26

40.50

Ext

0.904

.758—.962

0.722

2.00

30.23

RSF

0.868

.665—.948

0.443

1.23

33.64

LSF

0.793

.476—.918

0.995

2.76

67.43

RR

0.911

.776—.965

0.267

0.74

24.27

LR

0.853

.628—.942

0.471

1.31

40.17

Total

0.937

.841—.975

1.496

4.15

17.46

  1. ICC Intraclass correlation coefficient, 95% CI 95% confidence interval of ICC, SEM Standard error of measurement, in kgf, MDC Minimum detectable change, in kgf, MDC %, MDC as percentage of mean strength score for given direction for all subjects, Flex Flexion, Ext Extension, RSF Right side flexion, LSF Left side flexion, RR Right rotation, LR Left rotation, Total Sum of all directional strength values