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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.