Quantification of the Masseter Muscle Hardness of Stroke Patients Using the MyotonPRO Apparatus: Intra- and Inter-Rater Reliability and Its Correlation with Masticatory Performance

30 January 2021 : Clinical Research

Chao Song^1ACFG, Yi-Fu Yu^1BCDE, Wen-Long Ding^1BCD, Jian-Yong Yu^2BDF, Li Song^1BCF, Ya-Nan Feng^3CEF, Zhi-Jie Zhang^3AFG*

DOI: 10.12659/MSM.928109

Med Sci Monit 2021; 27:e928109

Background Material and Methods Results Discussion Conclusion References

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Table 1 Intra- and inter-operator reliability of MyotonPRO in measurement of bilateral masseter muscle stiffness in stroke patients.

	Intra-operator reliability
	Test 1 (mean±SD)	Test 2 (mean±SD)	SEM	ICC	95% CI	MDC
Paralyzed side	546.10±115.91	550.52±114.22	25.92	0.986	0.964–0.994	71.85
Healthy side	787.53±115.44	786.08±120.48	25.81	0.989	0.971–0.995	71.54


Paralyzed side	546.10±115.91	553.78±112.23	25.09	0.986	0.965–0.994	69.55
Healthy side	787.53±115.44	800.38±118.68	26.54	0.994	0.985–0.998	73.57
95% CI – 95% confidence interval; ICC – intraclass correlation coefficient; MDC – minimum detectable change; SD – standard deviation; SEM – standard error of the mean.

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