Table 2.
Most recent data before extubation of different unplanned extubation (UE) groups.
| 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 |
Expressed as mean ± SD (range) or n (%). aThe Mann-Whiney U test was used owing to not being normally distributed.