Table 1

Baseline characteristics of 182 outpatients with cardiorespiratory disease

CharacteristicNon-missing observations, nValue
Age (years)18268.6±13.8
Female18297 (53.3)
Main cause of breathlessness179
 Chronic obstructive pulmonary disease45 (24.7)
 Asthma39 (21.4)
 Heart failure35 (19.2)
 Idiopathic pulmonary fibrosis34 (18.7)
 Other interstitial lung disease10 (5.5)
 Other16 (8.8)
FEV1 (L)1521.89±0.78
FEV1, % of predicted15275.2±25.8
VC, % of predicted14878.7±20.7
Smoking status180
 Current smoker19 (10.4)
 Former smoker107 (58.8)
 Never smoker54 (29.7)
Weight (kg)18278.4±19.2
Height (cm)181168.7±9.0
Body mass index (kg/m2)18127.4±6.2
  • Data are presented as mean±SD or frequency (percentage). VC is the highest value of the slow and forced VC.

  • FEV1, forced expiratory volume in one second; VC, vital capacity.