Table 2

 Prevalence of respiratory symptoms, lung function, and conditions for the study group

CharacteristicNn (%)95% CI
Tlco, carbon monoxide lung transfer factor.
Morning cough1213195 (16.1)14.1 to 18.3
Chronic cough1213120 (9.9)8.3 to 11.7
Morning phlegm121390 (7.4)6.0 to 9.0
Chronic bronchitis121349 (4.0)3.0 to 5.3
Dyspnoea1213277 (22.8)20.5 to 25.3
Mild airflow obstruction1213226 (18.6)16.5 to 21.0
Moderate airflow obstruction121383 (6.8)5.5 to 8.4
Tlco <80% predicted1211153 (12.6)10.8 to 14.6
Chronic obstructive bronchitis121322 (1.8)1.1 to 2.7
Emphysema (symptomatic)121129 (2.4)1.6 to 3.4
Emphysema (asymptomatic)121156 (4.6)3.5 to 5.9
COPD121142 (3.4)2.5 to 4.7