Is OperaVOX a clinically useful tool for the assessment of voice in a general ENT clinic?

Table 2 Spearman rank correlation co-efficients between OperaVOX measurements and GRBAS parameters

	Jitter	Shimmer	NHR	MPT
Grade	0.495* p = 0.001	0.385* p = 0.01	0.526* p = 0	−0.415* p = 0.005
Roughness	0.199 p = 0.196	0.239 p = 0.118	0.272 0.074	−0.074 p = 0.635
Breathiness	0.342* p = 0.023	0.275 p = 0.071	0.344* p = 0.022	−0.336* p = 0.026
Aesthenia	0.445* p = 0.002	0.220 p = 0.152	0.413* p = 0.005	−0.399* p = 0.007
Strain	0.560* p = 0	0.411* p = 0.006	0.600* p = 0	−0.356* p = 0.018

Statistically significant correlations are highlighted with an asterisk. Correlation co-efficient size interpretation: 0.0–0.3, negligible correlation; 0.3–0.5, low correlation; 0.5–0.7, moderate correlation; 0.7–0.9, high correlation, 0.9–1.0: very high correlation [18]. NHR noise-to-harmonic ratio, MPT maximum phonation time

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