Table 2– Chronic bronchitis# in subjects with chronic obstructive pulmonary disease by study site
Total nProportion with chronic bronchitisAdjusted proportion+
n (%)(95% CI)%(95% CI)
Country
 Saõ Paulo, Brazil1529 (5.9)(2.3–9.6)7.7(4.8–12.0)
 Santiago, Chile19818 (9.1)(5.2–13.0)7.5(5.3–10.6)
 Mexico City, Mexico783 (3.9)(0.0–8.1)7.4(5.5–9.9)
 Montevideo, Uruguay1748 (4.6)(1.3–7.9)7.3(5.2–10.2)
 Caracas, Venezuela15712 (7.6)(3.9–11.3)7.2(4.5–11.2)
Total75950 (6.6)(4.9–8.3)7.4(5.5–9.9)
  • #: defined as cough and phlegm on most days, at least 3 months per year for ≥2 yrs; : there were no significant differences between countries, overall p=0.3115; +: of persons with chronic bronchitis adjusted for age and sex assessed using the Wald test and adjusted for survey design.