Geography and cough aetiology.

Area of Science:

• Pulmonology
• Epidemiology
• Internal Medicine

Background:

• Chronic cough is a prevalent medical complaint requiring accurate diagnosis and treatment.
• Epidemiological studies reveal significant international variations in the causes of chronic cough.
• Conditions like upper airway cough syndrome, rhinosinusitis, sinobronchial syndrome, and eosinophilic airway disorders contribute to diagnostic complexity.

Purpose of the Study:

• To discuss the etiologies of chronic cough.
• To highlight geographic variations in chronic cough causes, including differences between the US, UK, and Japan.
• To explore how factors such as race, geography, and healthcare systems influence chronic cough presentation and diagnosis.

Main Methods:

• Review of recent cough guidelines.
• Analysis of original papers on cough epidemiology.
• Comparative analysis of chronic cough aetiology across different countries.

Main Results:

• Significant differences in chronic cough aetiology exist between countries like the US, UK, and Japan.
• Commonly implicated conditions include rhinosinus disease and eosinophilic lower airway disorders, which can overlap.
• Geographic factors and variations in patient characteristics, potentially due to differing medical systems, contribute to these differences.

Conclusions:

• The etiology of chronic cough is not uniform globally and is influenced by geographic and systemic factors.
• Further research is needed to understand and address the international variations in chronic cough causes.
• Accurate diagnosis and treatment of chronic cough require consideration of regional epidemiological data.