TABLE 2.

SUMMARY OF LONGITUDINAL STUDIES OF CHRONIC BRONCHITIS AND ALL-CAUSE MORTALITY

Study	Patient Group	Follow-up (yr)	Risk
Tockman and Comstock (66)	884 Men	10	OR, 1.65 for chronic phlegm (0.95–2.89)
Copenhagen City Heart Study (57)	16,756 Men and women	10	RR, 1.1 (0.9–1.3) women, 1.3 (1.1–1.4) men
Pelkonen et al. (22)	1,711 Middle-aged men	40	HR, 1.49 (1.19–1.88)
Annesi and Kaufman (121)	1,061 Men	22	RR, 1.35 (1.20–1.50)
TESAOD (5)	1,412 Men and women	30	Adj HR, 2.2 (1.30–3.79) for age < 50 yr
NHANES I (64)	5,542 Men and women	22	HR, 1.2 (0.97–1.40)

Definition of abbreviations: Adj = adjusted; HR = hazard ratio; NHANES = National Health and Nutrition Epidemiologic Survey; OR = odds ratio; RR = relative risk; TESAOD = Tucson Epidemiologic Survey of Airway Obstructive Disease.