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Table 2 Characteristics of Health, Aging and Body Composition study participants included in the FEV 1 phenotype* analysis, stratified by race

From: Vitamin D-responsive SGPP2 variants associated with lung cell expression and lung function

Covariate

African-Americans

European-Americans

 

(N = 996)

(N = 1,502)

Age, years**

73.4 (2.9)

73.7 (2.8)

Women (%)

553 (55.5)

708 (47.1)

Memphis, TN site (%)

464 (46.6)

759 (50.5)

Former Smokers (%)

398 (40)

746 (49.7)

Current Smokers (%)

167 (16.8)

99 (6.6)

Pack-years

29.5 (24.1)

36.5 (31.9)

FEV1, mL

1948.7 (569.4)

2305.4 (654.3)

FEV1/FVC

75.5 (9.3)

74.4 (7.9)

Height, cm

165.7 (9.4)

167 (9.3)

Mean 25(OH)D (ng/mL)***

20.9 (10.6)

29 (11)

COPD, defined by LLN (%)

66 (7.0)

110 (7.5)

  1. *All participants in table have FEV1 data; approximately 50 fewer individuals have FEV1/FVC ratio data, but participant characteristics are the same for both phenotypes.
  2. **Data shown are mean (SD) or number (%).
  3. ***Serum 25(OH)D measured for 1,412 (94%) European-Americans and 864 (87%) African-Americans with the FEV1 phenotype, and for 1,383 European-Americans and 864 African-Americans with the FEV1/FVC phenotype.