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Table 1 Demographic characteristics

From: Increased production of hydrogen peroxide by peripheral blood monocytes associated with smoking exposure intensity in smokers

  Smokers Controls p value
  N=25 N=38  
Age (years) 50.3±8.8 49.1± 8.2 0.57
Gender (M/F) 12/13 16/22 0.84
FEV1 (L) 2.8±0.8 3.3±0.7 0.02
FEV1 (%) 103.2±18.1 112.4±13.5 0.06
FVC (L) 3.7±0.9 3.9±0.9 0.31
FVC (%) 110.9±17.2 111.0±13.9 0.20
FEV1/FVC (%) 77.3±5.7 83.3±4.1 <0.001
Pack-years 27.1±14.6 0.0±0.0 <0.001
SpO2 (%) 96.6±1.4 96.7±1.4 0.79
BMI (Kg/m2) 23.9±4.1 26.4±3.5 0.01
  1. M/F: male/female, FEV1: forced expiratory volume in the first second, FVC: forced vital capacity, SpO2: pulse oximetry, BMI: body mass index. The values are presented as the means and standard deviations. The statistical analysis was performed by t test or Chi-square.