Assessing Change Over Time in Voice Handicap and Voice-Related Perceived Control Using Ecological Momentary Assessment

Stress Effects on Pharyngeal Air Pressure and Upper Esophageal Sphincter Pressure During Phonation: The Influence of Vocal Tract Semi-Occlusion

OBJECTIVES/HYPOTHESIS

The objective of this study was to determine whether vocal tract semi-occlusion (SOVT) influenced stress effects on pharyngeal air pressure and upper esophageal sphincter (UES) pressure during phonation. Relationships between dysphonia and stress are well recognized but poorly understood. Stress effects act globally on the body, and may be observed beyond intrinsic laryngeal muscles to include pharyngeal muscles and the UES, which contribute to voice modulation. Phonation with SOVT may provide resistance to stress effects on the vocal tract. We hypothesized that stress effects on pharyngeal air pressure and UES pressure would be measurable with a high-resolution, 360° pressure catheter, and that stress effects would be impacted differently by occlusal and non-occlusal phonatory tasks.

METHODS

Ten healthy adults performed sustained vowel tasks (comfortable /a/, and loud /a/), and SOVT tasks (bilabial fricative and straw phonation). Each task was performed during a baseline condition, and during stress induced through a cold pressor task. Pharyngeal air pressure and UES pressure were measured via high-resolution manometry. Changes in pressure between baseline and stress were compared among phonatory tasks.

RESULTS

Stress-induced changes to UES pressure differed by phonatory task (P < 0.01). Stress increased UES pressures during vowels, but had no effect during bilabial fricative, and decreased UES pressures during straw phonation. Change in UES pressure with stress was greater for comfortable /a/ and loud /a/ than straw phonation (P = 0.048 and P = 0.019, respectively), and was not significantly different between comfortable /a/ or loud /a/ and bilabial fricative. Stress-induced changes in pharyngeal air pressure were not significantly different among tasks.

CONCLUSIONS

These findings help identify possible mechanisms underlying the relationship between stress and voice, and point to the utility of SOVT tasks for training vocal tract resistance to stress. This methodology provides a foundation for measuring changes to extra-laryngeal components of the vocal tract during phonation.

Association Between Communicative Participation and Psychosocial Factors in Patients With Voice Disorders

IMPORTANCE

Communicative participation can be conceptualized as taking part in life situations in which people are socially engaged. Communicative participation is an important aspect in the lives of patients with voice disorders, although it has not been formally assessed among a broad sample of patients with voice disorders. The associations between communicative participation and associated concepts (vocal impairment, psychosocial distress, and voice-specific perceived control) are unknown yet important for integrated treatment approaches.

OBJECTIVE

The primary objective was to examine the associations between communicative participation and vocal impairment, psychosocial distress, and voice-specific perceived control. The secondary objective was to examine whether perceived control moderates the association of distress with communicative participation and vocal impairment, the latter of which would replicate previous research. The hypotheses were that communicative participation would be associated with lower vocal impairment, lower distress, and higher perceived control and that higher perceived control would moderate the association between communicative participation and both vocal impairment and psychosocial distress.

DESIGN, SETTING, AND PARTICIPANTS

This cross-sectional study was conducted from June 2014 to May 2017 among a consecutive sample of adult patients with voice disorders at an academic voice clinic affiliated with the University of Minnesota. Of the 744 patients approached to participate in the survey study, 590 patients agreed. Data analysis was performed from January to June 2020.

MAIN OUTCOMES AND MEASURES

Communicative participation (measured by the 10-item general short form of the Communicative Participation Item Bank), vocal impairment (measured by the 10-item version of the Voice Handicap Index), psychosocial distress (measured by the 18-item version of the Brief Symptom Inventory), and voice-specific perceived control (measured by the 8-item present control subscale of the Perceived Control Over Stressful Events Scale).

RESULTS

The sample comprised 590 patients (mean [SD] age, 51.9 [17.1] years; 390 women [66.1%]) with voice disorders. Communicative participation was associated with lower vocal impairment (r = -0.73; 95% CI, -0.77 to -0.69), lower overall psychosocial distress (r = -0.22; 95% CI, -0.30 to -0.14), and higher voice-specific perceived control (r = 0.30; 95% CI, 0.23-0.37). Moderation analyses indicated that communicative participation was negatively associated with distress at all levels of perceived control and, replicating previous findings, greater vocal impairment was associated with higher psychosocial distress only in patients with lower perceived control.

CONCLUSIONS AND RELEVANCE

In this study, communicative participation was associated with, but distinct from, vocal impairment and was also associated with psychosocial distress and voice-specific perceived control. The study's results suggest that communicative participation is an important addition to voice research and clinical care.