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Table 1 Study subject characteristics and baseline spirometry data*

From: The association of Toll-like receptor 4 gene polymorphisms with the development of emphysema in Japanese subjects: a case control study

 

Emphysema

Controls

Number of subjects

106

137

Male/Female

102/4

133/4

Age (years)

71.3 ± 6.8†

63.2 ± 10.0

Smoking history (pack-years)

63.3 ± 28.1†

39.6 ± 18.7

FEV1 (liter)

1.47 ± 0.66†

2.64 ± 0.51

FEV1 (% pred)

54.7 ± 22.8†

88.8 ± 13.1

FEV1/FVC (%)

48.4 ± 11.2†

80.3 ± 5.7

  1. *Data are expressed as mean ± SD
  2. Abbreviations: FEV1 forced expiratory volume in 1 second; % pred percent of the predicted value; FVC forced vital capacity
  3. †p < 0.001 versus controls by the Mann-Whitney U test