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Table 3 Correlation of HRR and key variables of pulmonary function and CPET

From: Anticholinergics aggravate the imbalance of the autonomic nervous system in stable chronic obstructive pulmonary disease

Variables

r Value

p Value

FEV1 (L)

0.352

0.006*

FEV1(%predicted)

0.322

0.012*

FEV1/FVC (%)

0.395

0.002*

Peak WR (watt)

0.477

0.000*

Peak VO2(ml/min)

0.482

0.000*

Peak VCO2(ml/min)

0.393

0.002*

AT (ml/min)

0.419

0.001*

VO2/WR slope (ml/min/watt)

0.339

0.008*

HR/VO2 slope (beats/ml/min)

0.363

0.004*

VE/VCO2 slope

−0.013

0.922

  1. CPET Cardiopulmonary Exercise Test, HRR heart rate recovery, FVC forced vital capacity, FEV1 forced expiratory volume in the first second, WR work rate, VO2 oxygen uptake, VCO2 carbon dioxide production, VE minute ventilation, AT anaerobic threshold
  2. *significant difference, P < 0.05