68 Table 3. Reliability of the WST for the parameters number of swallows, duration, swallowing volume, swallowing capacity, and swallowing speed. Both patients with head and neck cancer and healthy subjects are depicted CI: Confidence Interval, ICC: Intraclass Correlation Coefficient, LoA: Limits of Agreement, SEM: Standard Error of Measurement, SDC: Smallest Detectable Change SDC% 16.5% 52.8% 48.8% 27.9% 23.6% 11.1% 27.6% 18.0% 24.6% 38.2% SDC 0.79 6.21 13.38 4.40 0.55 0.41 1.52 6.57 6.48 0.56 SEM% 5.9% 19.1% 17.6% 10.1% 8.5% 4.0% 10.0% 6.5% 8.9% 13.8% SEM 0.28 2.24 4.83 1.59 0.20 0.15 0.55 2.37 2.34 0.20 ICC2,1 (95% CI) 0.923 (0.846 to 0.962) 0.893 (0.793 to 0.946) 0.768 (0.577 to 0.879) 0.888 (0.787 to 0.943) 0.935 (0.873 to 0.967) 0.950 (0.908 to 0.973) 0.916 (0.847 to 0.954) 0.928 (0.869 to 0.961) 0.880 (0.785 to 0.935) 0.733 (0.551 to 0.849) 95% LoA 2.33 to -1.67 15.38 to -11.44 16.34 to -22.94 8.64 to -9.94 1.61 to -1.43 1.27 to -1.32 4.11 to -3.29 18.06 to -16.56 13.23 to -13.21 0.84 to -0.69 Diff. test-retest Mean (SD) 0.33 (1.02) 1.97 (6.84) -3.30 (10.02) -0.65 (4.74) 0.09 (0.77) -0.03 (0.66) 0.40 (1.89) 0.75 (8.83) 0.01 (6.75) 0.07 (0.39) Patients (n = 33) Number of swallows Duration (s) Swallowing Volume (mL) Swallowing capacity (mL/s) Swallowing speed (s) Healthy subjects (n = 40) Number of swallows Duration (s) Swallowing Volume (mL) Swallowing capacity (mL/s) Swallowing speed (s)
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