Table 1.

Statistic analyses of 27 recorded variables of collected data (N = 348)

Variables	Ventilator Weaning		Significance (p-value)
	Successful (n = 159)		Failed (n = 189)
Demographic Data
Gender (male/female)	90/69	110/79	0.828
Age***	72.67 ± 14.95	78.04 ± 12.22	<0.001
Physiology and Disease Factors
APACHE II score at hospitalization*	17.21 ± 4.94	18.62 ± 5.83	0.017
Coma Scale at hospitalization	9.54 ± 3.37	9.34 ± 3.93	0.611
Albumin (mg/dl)	2.78 ± 0.48	2.86 ± 2.77	0.725
Blood urea nitrogen (BUN) (mg/dl) ***	25.95 ± 17.45	39.26 ± 29.77	<0.001
Creatinine (mg/dl)	1.25 ± 0.92	3.97 ± 20.51	0.095
Hemoglobin (g/dl)	10.92 ± 1.61	10.46 ± 5.52	0.311
Pulmonary disease	92 (57.9%)	101 (53.4%)	0.449
Cardiac disease	26 (16.4%)	36 (19.0%)	0.575
Historical respiratory disease‡	32 (20.1%)	70 (37.0%)	0.001
Brain vessel disease	18 (11.3%)	14 (7.4%)	0.264
Other causes related to int. medicine‡	80 (50.3%)	129 (68.3%)	0.001
Acute respiratory distress syndrome	3 (1.9%)	0 (0%)	0.094
Multiple-organ failure†	0 (0%)	8 (4.2%)	0.009
Trauma	0 (0%)	4 (2.1%)	0.128
Brain Surgery‡	41 (25.8%)	19 (31.7%)	<0.001
Other kinds of surgeries†	8 (5.0%)	24 (12.7%)	0.015
Care and Treatment Factors
Tracheotomy	75 (47.2%)	71 (37.6%)	0.081
Coma scale at weaning***	9.23 ± 2.94	7.37 ± 2.96	<0.001
RSBI at weaning***	91.59 ± 41.94	162.58 ± 79.62	<0.001
Length of ICU admission (day)*	16.72 ± 6.54	18.26 ± 6.35	0.026
Days using ventilator***	33.38 ± 12.01	41.24 ± 16.68	<0.001
Ventilator associated pneumonia‡	20 (12.6%)	77 (40.7%)	<0.001
Blood stream infection‡	0 (0%)	8(4.2%)	0.009
Urinary tract infection‡	19 (11.9%)	50 (26.5%)	0.001
Nosocomial infection	8 (5.0%)	10 (5.3%)	1.000

Note: *p<0.05, ** p<0.01, and ***p<0.001 with Student's t-test; ^†p<0.05 and ^‡p<0.01 with Pearson χ² test.