Aim: To evaluate the spirometric data and the prevalence of chronic airway disease in old population (> 60 yrs) in Korea.

List to do

1. History taking
2. physical examination
3. Routine blood test
4. All spirometric data
5. In subgroup: further evaluation of allergic airway disease

Inclusion Criteria:

• > 60 yrs olds
• no known specific respiratory diseases

Exclusion Criteria:

• taking any medication for respiratory diseases
• History of diagnosis as a respiratory disease

For old people aged 60 yrs or more, the investigators will analyze their respiratory symptoms, spirometric data, smoking history, and atopic history in Korea.