Table 1:

Vocal fold vibratory features were rated based on feature definitions and scale levels.

Feature	Definition	Rating Scale	Range of Scalar Level
Mucosal Wave	Vocal fold deformation along the lateral plane during the opening phase	75-pt visual-analog scale in % with 6 anchoring points Absent---20%---35%---50%---65%---≥80%	15 percentage points
Amplitude	Maximum lateral excursion of each vocal fold from the most medial position	75-pt visual-analog scale in % with 6 anchoring points Absent---20%---35%---50%---65%--->80%	15 percentage points
Left-Right Phase Asymmetry	Phase difference between left and right vocal fold vibration	100-pt visual-analog scale with 4 anchoring points Absent: left and right vocal folds reach both maximal amplitude and the midline at the same time Mild: one vocal fold lags slightly behind the other either during the lateral-to-medial or medial-to-lateral transition Moderate: one vocal fold has already transitioned and begun to move medially before the other vocal fold has hit maximal amplitude Severe: one vocal fold has hit midline while the other vocal fold is at maximal amplitude	33 points
Vocal Fold Edge	Irregularity of the vibrating vocal fold edges	100-pt visual-analog scale with 4 anchoring points Regular: Vocal fold edge is straight with a sharp superior edge Mildly irregular: Vocal fold edge may be rounded and/or a mild swelling may be present. A sulcus may be present on the medial edge of the fold. Glottal closure may still be complete or a small anterior or posterior gap may be present. Moderately irregular: Vocal fold edge is clearly nonlinear, but does not impede the vibratory function of the contralateral fold. Glottal closure may form an hour-glass configuration. Severely irregular: Vocal fold edge is non-linear with a large protrusion, or multiple areas of irregularity. The lesion may impede the vibratory function of the contralateral fold.	33 points
Vertical Phase Difference	Vocal fold deformation along the vertical plane during the closing phase	Dichotic choice Present: inferior edge of the vocal fold is visible during closing Absent: inferior edge of the vocal fold is not visible during closing	1 point