Table 3 Spirometric variables in subjects with COPD
Age (y)FEV1 (l)FEV1 % of predFVC (l)FVC % of predFEV1/FVC % of pred.FEV1/FVC RSD
Males (n = 98)63.4 (11.0)2.00 (0.84)64.2 (20.3)3.61 (1.1)92.0 (19.8)70.8 (11.8)−3.07 (1.22)
Females (n = 85)59.9 (11.5)1.60 (0.52)71.1 (18.3)2.65 (0.7)99.5 (22.8)77.0 (8.1)−2.73 (0.96)
Total (n = 183)61.7 (11.3)1.83 (0.75)67.2 (19.7)3.2 (1.1)95.2 (21.4)73.5 (10.8)−2.92 (1.13)
p Value0.050.0010.050.00010.050.00050.052
  • Values are mean (SD).

  • p Values refer to difference between the genders.

  • COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; RSD, residual standard deviation.