. 2005 Dec 22;6(1):152. doi: 10.1186/1465-9921-6-152

Table 2.

Prevalence of airway diseases, symptoms and lung function in 55 year old women

	all		With spirometry (N = 2593)
	n/N	%	N/N	%

Chronic bronchitis by physician diagnosis	442/4649	9.5	211/2537	8.4
Chronic cough with phlegm production	225/4701	4.8	116/2563	4.6
Frequent cough	1065/4731	22.5	561/2581	21.8

COPD FEV₁/FVC<0.7			116/2581	4.5

			n	Mean	SD

FEV₁[L]			2590	2.55	0.46
FVC [L]			2584	3.09	0.51
FEV₁/FVC			2581	0.83	0.07