Analysis of Clinicians' Perceptual Cough Evaluation

Area of Science:

• Pulmonology
• Speech-Language Pathology
• Otolaryngology

Background:

• Subjective cough descriptions lack objective correlates.
• Understanding cough mechanics is crucial for diagnosis and treatment.

Purpose of the Study:

• To investigate the relationship between objective cough airflow measures and subjective perceptual descriptors.
• To determine if specific airflow characteristics correlate with common subjective cough perceptions.

Main Methods:

• Thirty clinicians evaluated ten cough audio samples.
• Cough samples were characterized by peak expiratory flow rate, expired volume, duration, and cough epoch.
• Clinicians rated coughs on strength, duration, quality, quantity, and effectiveness for airway protection.

Main Results:

• Perception of cough strength and effectiveness correlated with compression phase, peak expiratory flow rate, and volume acceleration.
• Breathiness was linked to absent compression or low expired volumes; strain was associated with prolonged compression or high peak expiratory rates.
• Clinician agreement was highest for distinguishing single vs. multiple coughs, and lowest for quality categories.

Conclusions:

• Modifications in cough airflow significantly influence perceptual evaluations.
• Inconsistent cough ratings among clinicians highlight the need for a standardized cough assessment system.