The epidemiology of cough

Area of Science:

• Epidemiology
• Respiratory Medicine
• Genetics

Background:

• Cough is a prevalent symptom often overlooked in recent epidemiological research.
• Existing literature lacks comprehensive epidemiological data on cough characteristics.
• Understanding cough phenotypes is crucial for respiratory health research.

Purpose of the Study:

• To analyze the phenotypic heterogeneity of cough using data from multiple epidemiological studies.
• To investigate the association of cough with asthma, gender, and its temporal evolution.
• To explore the potential for genetic research into cough.

Main Methods:

• Utilized published and unpublished data from three large epidemiological surveys: European Community Respiratory Health Survey, EGEA, and E3N.
• Examined cough phenotypes based on chronicity, productive nature, and diurnal/nocturnal patterns.
• Analyzed the relationship between cough, asthma, gender, and changes over a 12-year period.

Main Results:

• Identified significant phenotypic heterogeneity in cough, including variations in chronicity, productivity, and timing.
• Demonstrated associations between cough, asthma, and gender.
• Observed the evolution of cough characteristics over a 12-year timeframe.

Conclusions:

• Cough presents diverse phenotypes that warrant detailed epidemiological investigation.
• Further research, including genetic studies, is needed to fully understand cough mechanisms and associations.
• This study highlights the importance of considering cough heterogeneity in respiratory health assessments.