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Table 2 Descriptive statistics stratified by sex and ventilatory reserve (VR)

From: The association between dynamic lung volume and peak oxygen uptake in a healthy general population: the HUNT study

  Men Women
  VR ≥ 20% (n = 239) VR < 20% (n = 120) VR ≥ 20% (n = 330) VR < 20% (n = 52)
Age median (years) (interquartile range) 46.0 (35.7 – 55.7) 46.7 (38.1 – 54.8) 44.1 (31.6 – 54.6) 47.4 (35.0 – 57.8)
BMI (kg/m2) 26.4 ± 3.1 26.8 ± 2.8 25.2 ± 3.7 26.8 ± 3.9
PAI median (interquartile range) 15.0 (0.0 – 30.0) 30.0 (8.1 – 30.0) 15.0 (7.5 – 30.0) 22.5 (10.0 – 30.0)
HRR −0.05 ± 0.08 −0.05 ± 0.08 −0.04 ± 0.07 −0.04 ± 0.07
FEV1Z-score 0.47 ± 0.82 −0.09 ± 0.72 0.27 ± 0.85 −0.32 ± 0.77
VO2peak (ml/kg/min) 44.1 ± 8.5 49.1 ± 9.3 36.7 ± 7.5 37.9 ± 8.2
Peak O2pulse (ml/beat) 20.5 ± 3.5 22.9 ± 3.9 13.7 ± 2.3 15.4 ± 3.0
RERpeak 1.14 ± 0.05 1.15 ± 0.05 1.13 ± 0.06 1.14 ± 0.06
  1. BMI body mass index, PAI physical activity index, HRR heart rate reserve, FEV1Z-score forced expiratory volume in one second Z-score, VO2peak peak oxygen uptake, O2pulse oxygen pulse, RERpeak peak respiratory exchange ratio