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Table 1 Baseline characteristics of enrolled patients

From: Optimization of ventilator setting by flow and pressure waveforms analysis during noninvasive ventilation for acute exacerbations of COPD: a multicentric randomized controlled trial

  Optimized Ventilation Standard ventilation P
35 35  
Age, yrs 76 ± 10 79 ± 7 .173
Men, n (%) 24 (69) 21 (60) .618
BMI, Kg/m2 25.5 ± 6.2 27.0 ± 6.3 .302
BMI > 30, n (%) 7 (20) 8 (23) .771
LTOT, n (%) 25 (71) 20 (57) .318
Domiciliary NIV, n° (%) 3 (9) 7 (20) .306
Pre-NIV data    
   Respiratory rate 35 ± 6 33 ± 7 .093
   pH 7.27 ± .05 7.28 ± .05 .450
   PaO2/FiO2 222 ± 87 226 ± 56 .796
   PaCO2, mmHg 76 ± 17 71 ± 12 .141
   HCO3-, mmol/l 33 ± 6 32 ± 7 .569
  1. Data reported as mean ± standard deviation. No significant differences between groups. BMI, body mass index; LTOT, long-term oxygen therapy; NIV, noninvasive ventilation.