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Table 3 Reliability statistics of the kinematic variables (mean ± SD or 95% confidence intervals)

From: Kinematics of fast cervical rotations in persons with chronic neck pain: a cross-sectional and reliability study

Variables

Group

Test 1

Test 2

ICC

SEM

MD

CV

Peak Speed (degrees/s)

CON

365 ± 96

345 ± 82

0.75 (0.41-0.91) ††

41 (31-64)

114

12.4 (9.0-19.8)

 

NS

271 ± 125

253 ± 118

0.84 (0.58-0.94) ††

33 (25-52)

93

17.6 (12.7-28.6)

ROM (degrees)

CON

63.5 ± 7.7

61 ± 6.2

0.64 (0.21-86)

4.2 (3.1-6.4)

11.5

6.9 (5.1-10.9)

 

NS

59.2 ± 9.1

57.6 ± 11.1

0.86 (0.63-0.95)

3.8 (2.8-5.9)

10.6

7.8 (5.7-12.4)

NPA

CON

2.32 ± 0.21

2.34 ± 0.17

0.55 (0.08-0.82)

0.12 (0.09-0.18)

0.33

5.7 (4.1-8.9)

 

NS

2.31 ± 0.14

2.29 ± 0.14

0.37 (-0.16-0.73)

0.11 (0.08-0.18)

0.30

5.0 (3.7-7.9)

AD-ratio

CON

0.83 ± 0.29

0.81 ± 0.18

0.78 (0.45-0.92)

0.13 (0.10-0.20)

0.36

20.1 (18.6-73.5)

 

NS

0.81 ± 0.28

0.76 ± 0.28

0.79 (0.48-0.92) ††

0.12 (0.09-0.18)

0.33

17.2 (12.4-27.8)

SID (%)

CON

13.3 ± 5.0

14.5 ± 5.3

0.55 (0.07 - 0.82)

4.1 (3.0 - 6.4)

11.4

30.9 (22.0 - 51.7) †

 

NS

16.3 ± 4.2

15.8 ± 5.0

0.46 (-0.05-0.78)

3.4 (2.5-5.3)

9.4

24.2 (17.3-39.8)

CM (a.u.)

CON

12.4 ± 3.7

12.4 ± 3.8

0.38 (-0.15-0.74)

2.9 (2.2-4.6)

8.1

23.5 (16.8-38.6)

 

NS

18.8 ± 7.5

15.5 ± 4.9

-0.07 (-0.54-0.45)

6.5 (4.8-10.1)

18.0

44.1 (31.0-76.1)

  1. NS: non-specific neck pain group from sample-1 (n = 16); CON: healthy control group from sample-1 (n = 16); ROM: Range of movement; NPA: Normalized peak speed amplitude; AD-ratio: Acceleration-deceleration ratio; SID: Speed index of deviation; CM: Conjunct movements; a.u.: Arbitrary units. ICC: Intracorrelation coefficient; SEM: Standard error of measurement; MD: Minimal difference; CV: Coefficient of variation. † Heteroscedasticity. †† Skewness is present.