Table 1 Single factor analysis of classified variables.
|  | Total patients (N = 487) | Difficult weaning (N = 164) | Simple offline (N = 323) | χ2/Z | P value | |
|---|---|---|---|---|---|---|
Sex | Female | 188 (38.60) | 62 (37.80) | 126 (39.01) | 0.067 | 0.796 |
Male | 299 (61.40) | 102 (62.20) | 197 (60.99) | |||
Cough reflex intensity | 0 | 14 (2.87) | 11 (6.71) | 3 (0.93) | −4.405 | 0.000** |
1 | 154 (31.62) | 66 (40.) | 88 (27.) | |||
2 | 252 (51.75) | 72 (43.90) | 180 (55.73) | |||
3 | 67 (13.76) | 15 (9.15) | 52 (16.10) | |||
Consciousness | Lethargy | 19 (3.90) | 12 (7.32) | 7 (2.17) | 48.6 | 0.000** |
Somnolence | 3 (0.62) | 0 (0.00) | 3 (0.93) | |||
Coma | 40 (8.21) | 26 (15.85) | 14 (4.33) | |||
Confusion | 77 (15.81) | 40 (0.39) | 37 (11.46) | |||
Alertness | 348 (71.46) | 86 (52.44) | 262 (81.11) | |||
Vasoactive drugs | None | 407 (83.57) | 121 (73.78) | 286 (88.54) | ||
Norepinephrine | 53 (10.88) | 26 (15.85) | 27 (8.36) | 20.403 | 0.000** | |
Dopamine | 5 (1.03) | 3 (1.83) | 2 (0.62) | |||
Dobutamine | 1 (0.21) | 1 (0.61) | 0 (0.00) | |||
Epinephrine | 20 (4.11) | 13 (7.93) | 7 (2.17) | |||
Epinephrine and dopamine | 1 (0.21) | 0 (0.00) | 1 (0.31) | |||
