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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: Laryngoscope. 2018 Dec 25;129(8):1882–1890. doi: 10.1002/lary.27695

Table 2:

Demographics of the 16 participants who completed the study. Mean (standard deviation), EVT = essential voice tremor, VHI-10 = Voice Handicap Index-10, VTSS = Vocal Tremor Scoring System, TETRAS = Tremor Research Group Essential Tremor Rating Assessment Scale, QUEST = Quality of Life in Essential Tremor Questionnaire

Value Additional Information
Mean Age (SD) 70.3 years (8.7)
Sex 14 F, 2 M
Affected body areas
Presence of other body tremor Yes: 10
No: 6		 Head: 4
Jaw: 1
Face (lips): 1
Upper extremities: 8
Lower extremities: 1
Positive family history for tremor Yes: 10
No: 6
Self-reported voice improvement with alcohol Unknown: 6
Yes: 3
No: 7
Auditory-perceptual tremor severity (sustained vowel) Mild: 1
Mild-moderate: 4
Moderate: 5
Moderate-severe: 2
Severe: 4
Mean (SD) Range and % of Points Possible
Years post EVT onset 9.34 (7.12) 1.00 - 25.00
Initial VHI-10 Score, Baseline 1, Phase 1 (10 items, 40 points possible) 19.38 (8.50) Range = 2.00 - 34.00
% of Points Possible = 48.45%
VTSS (6 items, 18 points possible) 10.80 (3.99) 4.00 - 17.00
% of Points Possible = 60.00%
TETRAS Total Score (21 items, 112 points possible) 17.22 (14.12) 7.00 - 62.00
% of Points Possible = 15.38%
 • Activities of Daily Living subscale (12 items, 48 points possible) 10.00 (7.03) 4.00 - 34.00
% of Points Possible = 20.83%
 • Performance subscale (9 items, 64 points possible) 7.22 (7.47) 1.00 - 28.00
% of Points Possible = 11.28%
QUEST Total Score (30 items, 120 points possible 29.75 (20.11) 7.00 - 74.00
% of Points Possible = 24.79%
 • QUEST, Voice Impact Sub-analysis (4 questions, 16 points possible) Questions #3, #19, #20 & #21 relate to tremor interfering with telephone use, communication, & speech intelligibility 8.06 (4.30) 0.00 - 15.00
% of Points Possible = 50.38%