| Population | Weaning failure | Weaning success | p-value |
---|---|---|---|---|
 | N = 57 | N = 25 | N = 32 |  |
Age [IQR] | 65.0 [56.0; 71.0] | 64.0 [57.0; 71.0] | 66.5 [55.8; 71.0] | 0.766 |
Sex (male, %) | 42 (73.7%) | 17 (68.0%) | 25 (78.1%) | 0.577 |
SAPS2 | 34.0 [31.0; 41.0] | 34.0 [32.0; 41.0] | 33.5 [31.0; 41.0] | 0.612 |
RASS | − 1.00 [− 2.00; 0.00] | − 2.00 [− 2.00; − 1.00] | − 1.00 [− 2.00; 0.00] | 0.031 |
KM score | 2.00 [1.00;3.00] | 2.00 [2.00;3.00] | 1.00 [1.00;2.00] | 0.002 |
SAP (mmHg) | 133 [123; 149] | 130 [123; 140] | 140 [124; 151] | 0.227 |
DAP (mmHg) | 70 [63; 80] | 68 [60; 73] | 76 [65; 82] | 0.096 |
HR (bpm) | 78 [70; 90] | 82 [73; 90] | 77 [70; 90] | 0.541 |
RR (bpm) | 18 [16; 23] | 22 [16; 24] | 18 [16; 21] | 0.302 |
Body Temperature (°C) | 36.9 [36.5; 37.3] | 36.9 [36.7; 37.2] | 36.9 [36.5; 37.3] | 0.389 |
SpO2 (%) | 98 [96; 99] | 98 [96; 99] | 98 [96; 99] | 0.915 |
FiO2 | 0.40 [0.35; 0.50] | 0.45 [0.40; 0.50] | 0.40 [0.35; 0.45] | 0.033 |
pH | 7.46 [7.43; 7.50] | 7.47 [7.42; 7.49] | 7.46 [7.43; 7.50] | 0.955 |
PaCO2 (mmHg) | 43.0 [38.0; 48.0] | 43.0 [39.0; 48.0] | 41.5 [38.0; 47.2] | 0.562 |
PaO2 (mmHg) | 85.0 [75.0; 106] | 84.0 [72.0; 96.0] | 92.0 [79.0; 115] | 0.215 |
PaO2/FiO2 ratio (mmHg) | 216 [164; 280] | 176 [144; 231] | 241 [183; 308] | 0.032 |
Lactates (mEq/L) | 1.10 [0.90; 1.40] | 1.10 [0.90; 1.31] | 1.10 [0.91; 1.43] | 0.981 |
HCO3 (mEq/L) | 30.2 [27.9; 32.7] | 30.5 [27.9; 32.0] | 29.9 [27.7; 32.9] | 0.682 |
BE | 6.70 [3.40; 8.90] | 7.00 [3.40; 8.10] | 6.45 [3.72; 9.00] | 0.930 |
Diam exp. (mm) | 1.90 [1.50; 2.50] | 1.90 [1.50; 2.50] | 1.85 [1.50; 2.52] | 0.968 |
Diam insp. (mm) | 2.40 [2.00; 3.20] | 2.60 [2.00; 3.60] | 2.40 [1.98; 3.20] | 0.484 |
DTF (%) | 28.0 [21.7; 38.9] | 28.0 [16.7; 57.1] | 27.6 [22.1; 37.0] | 0.612 |
Previous NIV | 46 (80.7%) | 23 (92.0%) | 23 (71.9%) | 0.090 |
NIV Length (hours) | 15.0 [3.00; 36.0] | 20.0 [4.00; 36.0] | 7.00 [0.00; 37.0] | 0.248 |
Mech. Vent. duration (days) | 14 [7; 22] | 15 [8; 24] | 13 [7; 22] | 0.670 |
ICU LOS (days) | 20.0 [12.0; 31.0] | 27.0 [18.0; 37.0] | 16.5 [10.0; 27.5] | 0.025 |
Hospital LOS (days) | 37.0 [28.0; 47.0] | 44.0 [29.0; 51.0] | 34.0 [26.8; 43.0] | 0.171 |