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Table 1 Characteristics of participants with COPD aged 40–79 by race and ethnicity, U.S. NHANES 2007–2012 and Korea NHANES 2007–2015a

From: Racial differences in comorbidity profile among patients with chronic obstructive pulmonary disease

 

U.S. NHANES

Korea NHANES

 

Non-Hispanic White (n = 944)

Non-Hispanic Black (n = 324)

Hispanicb (n = 227)

Korean (n = 3808)

p value

Age, years

59.8(0.4)

59.6 (0.7)

59.6 (0.8)

63.6 (0.2)

< 0.001

Age group, years

< 0.001

 40–49

18.7 (1.7)

20.7 (2.9)

19.7 (3.1)

11.3 (0.7)

 

 50–59

31.2 (2.2)

30.9 (2.6)

29.9 (3.9)

23.2 (0.9)

 

 60–69

30.3 (2.4)

24.1 (1.8)

32.0 (3.0)

31.2 (0.9)

 

 70–79

19.8 (1.3)

24.2 (2.5)

18.3 (2.7)

34.3 (1.0)

 

Men, %

59.1 (2.4)

60.2 (2.3)

69.2 (4.2)

73.8 (0.9)

< 0.001

BMI, kg/m2

27.7 (0.2)

27.8 (0.4)

28. 6 (0.4)

23.7 (0.1)

< 0.001

BMI group

0.023

 Underweight

1.9 (0.5)

3.1 (1.2)

0

2.7 (0.4)

 

 Normal

32.3 (1.6)

35.1 (2.8)

27.4 (3.4)

38.9 (1.1)

 

 Overweight

37.8 (1.5)

33.4 (2.3)

41.9 (3.7)

27.6 (0.9)

 

 Obese

27.9 (1.4)

28.4 (2.6)

30.7 (3.8)

30.7 (1.0)

 

Smoking

< 0.001

 Current

33.5 (2.4)

42.4 (3.4)

26.4 (2.8)

41.6 (1.0)

 

 Former

39.9 (2.1)

26.4 (2.2)

35.5 (2.9)

27.9 (0.9)

 

 Never

26.6 (2.1)

31.3 (2.8)

38.1 (3.3)

30.5 (1.0)

 

Spirometry

 FVC, % predicted

96.5 (0.7)

96.7 (1.1)

97.9 (1.4)

90.5 (0.3)

< 0.001

 FEV1, % predicted

80.3 (0.7)

77.5 (1.1)

82.6 (1.3)

77.8 (0.3)

< 0.001

COPD severityc

0.106

 Mild

52.3 (2.3)

46.5 (3.1)

60.4 (4.1)

46.4 (1.0)

 

 Moderate

41.3 (2.2)

44.4 (3.1)

36.0 (4.3)

48.7 (1.1)

 

Severe-to-very severe

6.4 (0.8)

9.2 (2.3)

3.6 (1.1)

4.9 (0.4)

 
  1. aValues are presented as weighted means (standard error of the mean) or weighted percentage (standard error of the percentage)
  2. bHispanic was defined as Mexican American or other Hispanic
  3. cParticipants were categorized as having mild (FEV1 / FVC < 0.7 and FEV1 ≥ 80% predicted), moderate (FEV1 / FVC < 0.7 and 50% ≤ FEV1 < 80% predicted), or severe-to-very severe (FEV1 / FVC < 0.7 and FEV1 < 50% predicted) disease based on the Global Initiative for Chronic Obstructive Lung Disease guideline
  4. COPD chronic obstructive pulmonary disease, NHANES National Health and Nutrition Examination Survey (NHANES), BMI body mass index, FEV1 forced expiratory volume in 1 s, FVC forced expiratory vital capacity
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BMC Medicine

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