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Table 2 Prevalence of impaired FEV1 by race/ethnicity and race-specific reference value used

From: Race-specific reference values and lung function impairment, breathlessness and prognosis: Analysis of NHANES 2007–2012

Factor

White people

Black people

Other

N

5,928

3,130

5,065

Predicted normal FEV1, mean (SD)

   

White reference values

3.5 (0.81)

3.5 (0.79)

3.4 (0.75)

Other/mixed reference values

3.2 (0.76)

3.2 (0.73)

3.1 (0.70)

Black reference values

3.0 (0.68)

3.0 (0.66)

2.9 (0.63)

Prevalence of impaired FEV 1 (< LLN) using, %

   

White reference values

8.5%

36.9%

9.5%

Other/mixed reference values

5.1%

21.3%

4.4%

Black reference values

2.4%

9.3%

1.5%

Prevalence of moderate/severe FEV 1 impairment (< 50%pred) using, %

   

White reference values

0.8%

1.7%

0.5%

Other/mixed reference values

0.5%

1.1%

0.3%

Black reference values

0.4%

0.8%

0.2%

  1. Reference values by GLI-2012 [5]. For abbreviations, see Table 1