N/A N=41 Randomized Single-blind Prevention

Vocal Warm-up and Respiratory Muscle Training

Voice Disorders

Bottom Line

View on ClinicalTrials.gov: NCT02102399 ↗

Enrolled (actual)

Serious AEs

0.0%

Results posted

Sep 2015

Primary outcome: Primary: Voice Handicap Index (VHI-10) — 20.44; 13.82 units on a scale — p=0.001

Study Design & Population

Study type: Interventional
Phase: N/A
Interventions: Vocal Warm-up (Behavioral); Respiratory Muscle Training (Behavioral)
Age: Adult · 20+ yrs
Sex: All
Sponsor: Federal University of Bahia
Primary completion: Sep 2013

Outcome Measures

Outcome	Result	p-value
PRIMARY Voice Handicap Index (VHI-10)	20.44; 13.82	0.001 sig
PRIMARY Acoustic Analysis (Fundamental Frequency)	191.87; 185.71	0.345
PRIMARY Acoustic Analysis (Jitter)	0.19; 0.45	0.171
PRIMARY Acoustic Analysis (Shimmer)	2.77; 4.19	0.022 sig
PRIMARY Acoustic Analysis (Noise)	0.72; 0.72	0.451
PRIMARY Acoustic Analysis (GNE)	0.88; 0.88	0.477
PRIMARY Voice Handicap Index (VHI-10) 2	21.78; 13.04	0.007 sig
PRIMARY Acoustic Analysis (Fundamental Frequency) 2	196.21; 186.25	0.049 sig
PRIMARY Acoustic Analysis (Jitter) 2	0.14; 0.10	0.323
PRIMARY Acoustic Analysis (Shimmer) 2	2.90; 3.10	0.296
PRIMARY Acoustic Analysis (Noise) 2	0.69; 0.68	0.776
PRIMARY Acoustic Analysis (GNE) 2	0.89; 0.92	0.959
PRIMARY Change in Voice Handicap Index (VHI-10)	-8.75; -6.61	0.76
PRIMARY Change in Fundamental Frequency	-9.96; -6.15	0.30
PRIMARY Change in Jitter	-0.02; 0.25	0.20
PRIMARY Change in Shimmer	0.20; 1.41	0.77
PRIMARY Change in Noise	-0.01; -0.004	0.49
PRIMARY Change in GNE	0.02; 0.001	0.74
SECONDARY Post-treatment Questionnaire (Voice Symptoms Improvement)	64.3; 11.8	0.003 sig
SECONDARY Post-treatment Questionnaire (Voice Clearer)	50; 17.7	0.120
SECONDARY Post-treatment Questionnaire (Easier to Talk)	57.2; 17.7	0.030 sig
SECONDARY Post-treatment Questionnaire (Compliance With Intervention)	100; 76.5	0.107

Summary

The purpose of this study is to verify the effects of two speech-pathology interventions: vocal warm-up and respiratory training in teachers who work in a public school of the city of Salvador-Bahia, with or without complaints of vocal disorders. It is a preventive study and the hypothesis is that both approaches can produce positive voice changes, but the Vocal Warm-up will produce the most significant changes.

Eligibility Criteria

Inclusion Criteria

Age between 20-60.
No occurence of speech therapy simultaneously to the intervention

Exclusion Criteria

Professional voice use in another activity;
Frequent use of alcohol and tobacco;
Influenza and/or upper respiratory tract infections (eg, rhinitis, sinusitis, pharyngitis) during the period of participation in the research.

View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT02102399). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.