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Table 2 Intra-rater reliability of the five muscle performance tests

From: The intra- and inter-rater reliability of five clinical muscle performance tests in patients with and without neck pain

Examiner A ICC agreement 95% CI Meandiff_AB (SDdiff_AB) SEM consistency LOA SDC
JPE Rotation 0.66 0.43 - 0.79 0.08 (0, 28) 0.20 -0.468 0.634 0.55
JPE Flexion 0.82 0.71 - 0.89 -0.04 (0.31) 0.22 -0.640 - 0.560 0.60
JPE Extension 0.80 0.66 - 0.88 -0.004 (0.34) 0.24 -0.670 - 0.666 0.67
CCFT 0.69 0.53 - 0.80 -0.07 (2.61) 1.84 -5.176 - 5.044 5.11
Neck flexor muscle endurance (supine) 0.68 0.52 - 0.80 3.08 (23.13) 16.35 -42.25 - 48.41 45.34
Neck flexor muscle endurance (sitting 45°) 0.41 0.18 - 0.60 -18.21 (76.55) 54.13 -168.25 - 131.83 150.04
Neck extensor test 0.41 0.17 - 0.60 -0.07 (29.24) 20.68 -57.38 - 57.24 57.31
Examiner B       
JPE Rotation 0.70 0.50 - 0.81 0.05 (0.267) 0.19 -0.478 - 0.568 0.52
JPE Flexion 0.64 0.40 - 0.79 0.03 (0.344) 0.24 -641 - 0.717 0.67
JPE Extension 0.48 0.13 - 0.67 -0.03 (0.368) 0.26 -0.755 - 0.687 0.72
CCFT 0.81 0.70 - 0.88 0.00 (2.098) 1.48 -4.112 - 4.112 4.11
Neck flexor muscle endurance (supine) 0.75 0.61 - 0.85 -6.46 (20.61) 14.57 -46.86 - 33.94 40.40
Neck flexor muscle endurance (sitting 45°) 0.59 0.40 - 0.73 -10.97 (49.66) 35.12 -108.30 - 86.36 97.33
Neck extensor test 0.14 -0.12 - 0.37 -4.57 (32.58) 23.04 -68.43 - 59.29 63.86
  1. JPE = Joint position error, CCFT = Cranio-Cervical Flexion Test. 95% CI = 95% confidence interval, ICC agreement = Inter class correlation coefficients. Meandiff_AB = mean difference between examiner A and B, SDdiff_AB = standard deviation of the mean difference between examiner A and B. SEM = standard error of mesurement, LOA = Limits of agreements, SDC = smallest detectable change.