Modulation in Elastic Properties of Upper Trapezius with Varying Neck Angle

Table 2

Intra- and interrater reliabilities of SWE for assessing upper trapezius muscle stiffness.

	Cervical flexion at 0°			Cervical flexion at 50°
		SEM	MDC		SEM	MDC
Operator A in test 1		2.54	7.04		5.01	13.89
Operator A in test 2		2.59	7.20		4.37	12.13
Operator B		2.69	7.48		4.86	13.49
ICC^a (95% CI)	0.86 (0.69–0.94)			0.85 (0.67–0.94)
ICC^b (95% CI)	0.98 (0.96–0.99)			0.94 (0.86–0.97)

ICC, intraclass correlation coefficient; CI, confidence interval; SEM (kPa), standard error of measurement of kPa; MDC (kPa), minimal detectable change; SD (kPa), standard deviation of kPa; kPa, kilo Pascal. ^aIntraoperator reliability; ^bInteroperator reliability.