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Table 1 Demographics and smoking history: adults ≥45 years, with and without physician-diagnosed COPD: NHANES 1999–2008

From: The prevalence of clinically-relevant comorbid conditions in patients with physician-diagnosed COPD: a cross-sectional study using data from NHANES 1999–2008

Demographic Variables Without COPD With COPD
(n = 14,828)a (n = 995)b
Age, mean yr (95% CI) 60.0 (59.6–60.3) 62.7 (61.7–63.8)
Gender   
Male % (95% CI) 47.0 (46.2–47.9) 39.9 (36.0–44.0)
Female, % (95% CI) 53.0 (52.1–53.8) 60.1 (56.0–64.0)
Race   
White, % (95% CI) 76.4 (73.5–79.1) 84.6 (81.4–87.4)
Black, % (95% CI) 10.0 (8.5–11.8) 6.8 (5.1–8.9)
Hispanic, % (95% CI) 8.8 (7.0–11.0) 4.4 (3.0–6.3)
Smoking History   
Ever smoker, % (95% CI) 52.1 (50.7–53.4) 68.9 (65.2–72.5)
> 10 pack years, % (95% CI) 26.8 (25.7–27.9) 43.0 (38.7–47.5)
  1. a Represents ~100 million noninstitutionalized US civilians.
  2. b Represents ~10 million noninstitutionalized US civilians.