Comparative Study of Two Semi-Occluded Vocal Tract Protocols: A Randomized Clinical Trial.
Introduction: Semi-occluded vocal tract exercises (SOVTEs) are widely used as a therapeutic tool to create flow resistance in the upper airway. The current study was a randomized controlled clinical trial to establish the efficacy of two SOVTE protocols, flow-resistant tube (FRT) and Lessac-Madsen R...
| Published in: | Journal of Speech, Language & Hearing Research Vol. 67; no. 11; pp. 4275 - 4288 |
|---|---|
| Main Authors: | , , , , |
| Format: | Article |
| Published: |
American Speech-Language-Hearing Association
Nov2024
|
| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=180765738&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 180765738 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: Nov2024 vid: 67 iid: 11 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 180765738 10.1044/2024_JSLHR-22-00456 ppf: 4275 ppct: 13 formats: fmt: @attributes: type: P size: 832KB tig: atl: Comparative Study of Two Semi-Occluded Vocal Tract Protocols: A Randomized Clinical Trial. aug: au: Heller-Stark, Amanda Maxfield, Lynn Herrick, Jennifer Smith, Marshall Titze, Ingo affil: Utah Center for Vocology, The University of Utah, Salt Lake City School of Music, The University of Utah, Salt Lake City Study Design and Biostatistics Center for Clinical and Translational Science, The University of Utah, Salt Lake City Department of Surgery, The University of Utah, Salt Lake City su: Self-evaluation Randomized controlled trials Medical protocols T-test (Statistics) Research funding Statistical sampling Multiple regression analysis Questionnaires Treatment effectiveness Descriptive statistics Analysis of covariance Chi-squared test Voice disorder treatment Physiological aspects of speech Statistics Comparative studies Confidence intervals Data analysis software Quality assurance sug: subj: Self-evaluation Randomized controlled trials Marketing Research and Public Opinion Polling Medical protocols T-test (Statistics) Research funding Statistical sampling Multiple regression analysis Questionnaires Treatment effectiveness Descriptive statistics Analysis of covariance Chi-squared test Voice disorder treatment Physiological aspects of speech Statistics Comparative studies Confidence intervals Data analysis software Quality assurance ab: Introduction: Semi-occluded vocal tract exercises (SOVTEs) are widely used as a therapeutic tool to create flow resistance in the upper airway. The current study was a randomized controlled clinical trial to establish the efficacy of two SOVTE protocols, flow-resistant tube (FRT) and Lessac-Madsen Resonant Voice Therapy (LMRVT). Exploratory investigations included a noninferiority analysis of FRT to the widely adopted therapy protocol (LMRVT), as well as examining the dosing required to improve acoustic measures and subjective ratings. Method: Sixty-seven participants with voice disorder were randomized into one of five groups: 4-week FRT (n = 14), 8-week FRT (n = 19), 4-week LMRVT (n = 15), 8-week LMRVT (n = 5), and control (n = 14). Voice Handicap Index (VHI) and Vocal Fatigue Index scores were collected pre- and posttreatment. Acoustic analysis using the Acoustic Voice Quality Index was completed. We compared VHI between controls and 8-week FRT and LMRVT, adjusting for pre-VHI using linear regression. We examined the efficacy of 4-week protocols relative to controls and conducted a noninferiority comparison of FRT (4 and 8 weeks) to LMRVT (4 and 8 weeks) using 5- and 10-point margins. Finally, we compared the 4- versus 8-week sessions for both therapies. Results: A statistically significant reduction of VHI in both 8-week FRT relative to controls (-10.60, 95% CI [-19.80, -1.40], p = .025) and 8-week LMRVT (-15.74, 95% CI [-29.40, -2.08], p = .025) was found. We also found an improvement in 4-week FRT relative to controls (-10.11, 95% CI [-20.03, -0.20], p = .046), but the 4-week LMRVT result was not statistically significant (p = .057). FRT was found to be noninferior to LMRVT in terms of VHI using a 10-point margin (FRT - LMRVT: 0.69, 95% CI [-5.76, 7.15], p = .01), but not using a 5-point margin (p = .054). There were no statistically significant differences in VHI scores between 4- and 8-week sessions for either therapy. Conclusions: Both FRT and LMRVT improved VHI scores relative to controls. FRT was noninferior to LMRVT in terms of VHI scores. There were no statistically significant differences in VHI scores between 4- and 8-week therapy sessions. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
|---|