Table 2 Most recent data before extubation of different unplanned extubation (UE) groups.

From: Prognostic factors and outcomes of unplanned extubation

Item All patients (n = 295) Non-survivors (n = 45) Survivors (n = 250) p value
Mean arterial pressure (mmHg) 98.0 ± 17.7 (50~153) 93.9 ± 23.0 98.8 ± 16.5 0.185
Heart rate (beats/min) 92.4 ± 17.1 (52~152) 95.0 ± 19.0 91.9 ± 16.7 0.365a
Respiratory rate (/min) 17.6 ± 5.7 (7~36) 19.3 ± 6.1 17.3 ± 5.5 0.026
Arterial blood gas data
 pH 7.43 ± 0.06 (7.13~7.59) 7.40 ± 0.09 7.44 ± 0.05 0.015
 PaO2 (mmHg) 107.7 ± 56.1 (24~506) 104.6 ± 65.2 108.3 ± 54.5 0.695
 FiO2 (%) 31.5 ± 12.7 (21~100) 36.8 ± 19.1 30.2 ± 10.2 0.029
 PaO2/FiO2 (mmHg) 346.9 ± 131.9 (24~506) 313.8 ± 170.7 352.9 ± 123.0 0.152
 PaCO2 (mmHg) 37.1 ± 8.3 (15.8~75.7) 36.7 ± 9.5 37.1 ± 8.1 0.802
 Tidal volume (mL) 508.6 ± 152.1 (209~1458) 501.3 ± 132.3 510.0 ± 155.7 0.542a
 PEEP (cmH2O) 5.9 ± 1.6 (0~14) 7.1 ± 2.2 5.6 ± 1.4 <0.001
Biochemistry data
 Hb 10.9 ± 2.0 (5.0~18.0) 10.2 ± 2.5 11.1 ± 1.8 0.012a
 Hct 33.5 ± 7.0 (5.1~52.3) 31.0 ± 8.7 33.9 ± 6.6 0.013
 BUN 31.3 ± 23.5 (3~163) 48.7 ± 35.3 28.1 ± 19.1 <0.001a
 Creatinine 1.9 ± 2.5 (0.4~26.2) 2.7 ± 2.2 1.8 ± 2.5 0.024
 Sodium 139.3 ± 6.3 (112.4~161.3) 138.6 ± 8.4 139.4 ± 5.9 0.542
 Potassium 3.9 ± 0.5 (2.6~5.9) 3.9 ± 0.6 3.8 ± 0.5 0.713
 Calcium 7.9 ± 0.9 (1.2~12.4) 8.0 ± 1.0 7.9 ± 0.9 0.579a
 Phosphate 3.6 ± 1.8 (1.3~12.4) 4.2 ± 2.4 3.5 ± 1.6 0.292a
 Albumin 2.7 ± 0.7 (0.9~4.4) 2.4 ± 0.7 2.8 ± 0.7 0.003
UE shift     0.234
 Day time 102 (34.7%) 14 (31.3%) 88 (35.2%)  
 Evening time 112 (38.0%) 14 (31.1%) 98 (39.2%)  
 Night time 81 (27.5%) 17 (37.8%) 64 (25.6%)  
Agitation 95 (32.2%) 13 (28.9%) 82 (32.8%) 0.605
Sedatives 100 (33.9%) 17 (37.8%) 83 (33.2%) 0.550
Use of Lorazepine 24 (8.1%) 9 (20.0%) 15 (6.0%) 0.005
Weaning status 159 (53.9%) 12 (26.7%) 147 (58.8%) <0.001
  1. Expressed as mean ± SD (range) or n (%). aThe Mann-Whiney U test was used owing to not being normally distributed.