Table 1: Baseline characteristics of the study population.

Variable Total population (N=77) SBT success
(N1=49)
SBT failure
(N2=29)
p
Age, yrs 69 (24) 66 (25) 73.5(11) 0.024
Gender % (n)
-male
-female
62.3 (48)
37.7 (29)
70.8 (34)
51.7 (15)
29.2 (14)
48.3 (14)
0.091
APACHE II score 19.4±7 19.1±7.3 19.9±6.7 0.639
CVC placement %, (n)
-jugular
-subclavian
-femoral
54.5 (42)
9.1 (7)
36.4 (28)
64.3 (27)
57.1 (4)
64.3 (18)
35.7 (15)
42.9 (3)
35.7 (10)
0.932
Days on mechanical ventilation until first SBT 4 (4) 4 (4) 4 (4) 0.542

SBT: Spontaneous breathing trial CVC: central venous catheter