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Table 2 Baseline characteristics of subjects who showed an upward shift in FEV1/FVC category between their baseline and final visits

From: Lung function decline in relation to diagnostic criteria for airflow obstruction in respiratory symptomatic subjects

  Subgroup
  D (n = 177) E (n = 64) F (n = 289)
  LLN + Fixed + ? LLN-Fixed+ LLN + Fixed + ? LLN-Fixed- LLN-Fixed + ? LLN-Fixed-
  Non-smokers
(n = 97)
Smokers
(n = 80)
Non-smokers
(n = 33)
Smokers
(n = 31)
Non-smokers
(n = 210)
Smokers
(n = 79)
Males, n (%) 65 (67) 44 (55) 16 (49) 8 (26) 105 (50) 42 (53)
Age, years (SD) 63.4 (10.3) 58.9 (10.0) 53.7 (11.2) 52.7 (7.7) 63.4 (9.7) 60 (10.6)
Baseline postbronchodilator FEV1/FVC (SD) 0.56 (0.06) 0.57 (0.06) 0.61 (0.06) 0.60 (0.06) 0.67(0.03) 0.67 (.02)
Baseline postbronchodilator FEV1, liters (SD) 1.86 (0.59) 1.99 (0.65) 2.08 (0.65) 1.87 (0.59) 2.26 (0.71) 2.24 (0.62)
as % predicted* (SD) 59.7 (13.2) 61.7 (14.0) 64.3 (15.4) 63.5 (14.0) 74.8. (12.2) 71.1 (11.3)
  1. * based on Swanney prediction equations [6]
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