Table 1.

Intra-rater reliability of ultrasound measurements of the masseter muscle (N = 97)

	At rest	During contraction
ICC (1, 1)	0.83	0.86
95%CI	0.76–0.89	0.80–0.90
ICC (1,2)	0.91	0.92
95%CI	0.86–0.94	0.89–0.95

ICC Intra-class correlation coefficient

95%CI 95% confidence interval