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Table 2 Difference between pooled routine airway clearance and chest physiotherapy data for each outcome measure, and the interaction effect of recruitment manoeuvres: mean difference, standard error (SE), significance and 95% confidence intervals (CI) (linear mixed models)

From: Chest physiotherapy improves regional lung volume in ventilated children

  Chest physiotherapy (CPT) minus routine airway clearance main effect CPT*recruitment interaction effect
Mean difference SE Significance 95% CI Significance
Ventilation distribution (relative impedance Δ)
 Global Amp − 0.004 0.012 0.745 − 0.027–0.020 0.479
 Global EELV 0.084 0.018 *0.000 0.047–0.121 0.293
 Anterior EELV 0.047 0.015 *0.003 0.017–0.078 0.931
 Posterior EELV 0.107 0.027 *0.000 0.053–0.160 0.402
 Global inhomogeneity index 0.043 0.018 *0.017 0.008–0.078 0.230
 Geometric centre (%) − 3.613 1.241 *0.005 − 6.097 to − 1.129 0.833
Gas exchange
 PaO2 (mmHg) − 7.861 6.186 0.209 − 20.243–4.521 0.217
 PaCO2 (mmHg) 9.615 3.013 *0.002 3.610–15.620 0.110
 PF ratio − 56.663 32.220 0.084 − 121.210–7.885 0.250
 FiO2 0.040 0.024 0.106 − 0.009–0.089 0.279
 SpO2 − 0.175 0.790 0.825 − 1.763–1.412 0.095
 SpO2/FiO2 − 33.565 21.584 0.126 − 76.832–9.703 0.195
Physiological state
 Respiratory rate (bpm) 5.886 3.190 0.070 − 0.495–12.267 *0.001
 Heart rate (bpm) 4.869 7.021 0.491 − 9.202–18.940 *0.048
  1. Abbreviations: Amp amplitude, bpm breaths/beat per minute, CI confidence interval, EELV end-expiratory level volume, FiO2 fraction of inspired oxygen, HR heart rate, PaO2 partial pressure of arterial oxygen, PaCO2 partial pressure of arterial carbon dioxide, PF PaO2/ FiO2, SE standard error, SpO2 oxygen saturation, Δ change
  2. *p < 0.05