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Table 4 EIT data in patients with extubation success and failure

From: Electrical impedance tomography during spontaneous breathing trials and after extubation in critically ill patients at high risk for extubation failure: a multicenter observational study

  Baseline SBT_0 SBT_30 SB_0 SB_30
∆Vt%
 Extubation success (n = 39) 0 [0; 0] − 12 [− 31; 0] − 9 [− 29; 7] − 3 [− 16; 18] − 12 [− 34; 19]
 Extubation failure (n = 22) 0 [0; 0] − 25 [− 42; − 10] − 29 [− 45; − 11] − 21 [− 39; 1] − 22 [− 46; − 11]
 Extubation success vs. failure p > 0.999 p = 0.117 p = 0.024 p = 0.014 p = 0.061
∆EELI (ml)
 Extubation success (n = 39) 0 [0; 0] − 125 [− 237; 23] − 78 [− 250; 115] − 187 [− 488; 82] − 60 [− 371; 256]
 Extubation failure (n = 22) 0 [0; 0] − 112 [− 316; 17] − 194 [− 335; − 59] − 236 [− 438; 139] − 290 [− 537; 152]
 Extubation success vs. failure p > 0.999 p = 0.671 p = 0.253 p > 0.999 p = 0.132
Inhomogeneity index
 Extubation success (n = 39) 46 [42; 63] 53 [44; 68] 56 [44; 70] 52 [45; 66] 53 [45; 69]
 Extubation failure (n = 22) 53 [48; 60] 65 [55; 80] 62 [54; 71] 64 [50; 79] 66 [55; 74]
 Extubation success vs. failure p = 0.166 p = 0.025 p = 0.132 p = 0.049 p = 0.029
  1. SBT: Spontaneous Breathing Trial; SBT_0: first 5 min after the beginning of the SBT; SBT_30: last 5 min of the SBT; SB_0: first 5 min of the spontaneous breathing; SB_30: last 5 min of the spontaneous breathing; ∆Vt%: change from baseline of the tidal volume in percentage; ∆EELI: change from baseline of the end-expiratory lung impedance
  2. According to Bonferroni correction, the threshold for statistical significance is p < 0.017