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Table 1 Baseline characteristics of ex-/non-smokers (n = 39)

From: Ambulatory pulse oximetry monitoring in Japanese COPD outpatients not receiving oxygen therapy

Age (years) Mean ± SD 71.6 ± 8.8
Sex Male/female 36/3
Smoking pack/years Mean ± SD 68.2 ± 33.4
BMI (kg/m2) Mean ± SD 23.1 ± 3.8
     Underweight (BMI < 18.5 kg/m2) n (%) 4 (10.3)
     Overweight (BMI 25–30 kg/m2) n (%) 5 (12.8)
     Obese (BMI ≥ 30 kg/m2) n (%) 2 (5.1)
Unadjusted Charlson Comorbidity Index Median (range) 1 (0–4)
Age-adjusted Charlson Comorbidity Index Median (range) 5 (2–9)
Treatment   
     Long-acting muscarinic antagonist n (%) 26 (67%)
     Long-acting β2 agonist n (%) 27 (69%)
     Inhaled corticosteroid n (%) 27 (69%)
PaO2 (mmHg) Mean ± SD 78.2 ± 8.9
PaCO2 (mmHg) Mean ± SD 39.1 ± 4.9
GOLD stage I/II/III/IV 2/18/13/6
FEV1 (L) Mean ± SD 1.3 ± 0.6
FEV1 (%predicted) Mean ± SD 50.9 ± 18.5
FVC (L) Mean ± SD 2.3 ± 1.0
mMRC dyspnoea grade Mean ± SD 2.2 ± 1.1
  Median (range) 2 (0–4)
CAT score Mean ± SD 11.7 ± 7.0
  Median (range) 10 (0–29)
  1. BMI, Body mass index; CAT, Chronic obstructive pulmonary disease assessment test; FEV1, Forced expiratory volume in one second; FVC, Forced vital capacity; GOLD, Global Initiative on Obstructive Lung Disease; mMRC, Modified Medical Research Council; SD, Standard deviation.