Table 1.

Patient characteristics according to outcome

Patient characteristics	Whole cohort n = 191	Unplanned extubation n = 36	Planned extubation n = 67	Death or DAA n = 88	p value
Age	54.8 (15.5)	49.7 (15.8)	56.4 (14.6)	55.5 (16.0)	0.091*
Female	44.5	27.8	53.7	47.3	0.044†
Mean SAPS II‡	49.0 (0.26)	50.4 (13.9)	46.1 (14.5)	52.2 (13.5)	0.151*
Admission to the ICU	55.0	58.3	35.1	38.7	0.032
Admission to nonsurgical area	73.3	58.3	67.2	45.9	0.063†
Reasons for intubation
Cardiovascular	24.1	19.4	29.9	23.0	0.548†
Pulmonary	43.5	33.3	35.6	54.1	0.081†
Sepsis	12.0	11.1	7.5	14.9	0.331†
Neurologic	37.2	47.2	40.3	33.8	0.146†
Surgical and others	7.9	2.8	9.0	8.1	0.752†
CPAP mode (versus other MV modes)	14.1	19.4	7.5	16.2	0.180†
Median length of stay (days)	17 [22]	21.5 [23.5]	26 [28]	10 [16]	< 0.001§
Median length of intubation (days)	8 [10]	4.5 [7.5]	8 [9]	10 [16]	< 0.001§

DAA - discharge against advice; SAPS II - simplified acute physiology score II; ICU - intensive care unit; CPAP - continuous positive airway pressure; MV - mechanical ventilation.

^*One-way ANOVA;

^†Chi-square test;

^‡n are as follows: whole - 143; unplanned extubation - 30; planned extubation - 53; death/discharge against advice - 60;

^§Kruskal-Wallis rank test.

Results expressed by mean (standard deviation), % or median [interquartile range].