Skip to content

Chaos in Human Phonation and Its Measurement

Chaos in Human Phonation and Its Measurement

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR-ROC-17013825
Enrollment
Unknown
Registered
2017-12-11
Start date
2008-08-04
Completion date
Unknown
Last updated
2017-12-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Voice disease

Interventions

Smokers:smoke
Nonsmokers:Non-smoke

Sponsors

University of Wisconsin School of Medicine and Public Health
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: Male, Smokers were defined as subjects who smoked at least five cigarettes everyday for at least five consecutive years before the study. Nonsmokers were operationally defined as subjects who had never smoked.

Exclusion criteria

Exclusion criteria: Exclusion criteria included: excessive use of voice, overexposure to noise, alcohol addiction, symptoms consistent with gastroesophageal reflux disease (GERD) and laryngopharyngeal reflux (LPR), symptoms of a cold within the previous two weeks and chronic rhinitis or post-nasal drip.

Design outcomes

Primary

MeasureTime frame
Voice;Aerodynamic;

Countries

China

Contacts

Public ContactWei Chunsheng

EENT Hospital of Fudan University

13818188547@139.com02164377134-2202

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026