Table 3. Clinical variables at the end of the spontaneous breathing trial.

	Weaning Success	Extubation failure	p value a
Heart Rate (beats/min)	88 ± 17	98 ± 16	0.079
Systolic arterial blood pressure (mmHg)	139 (124–158)	134 (124–134)	0.765
CVP (mmHg)	10 (6–12)	10 (5–12)	0.782
Respiratory Rate (breaths/min)	21 (18–24)	19 (17–25)	0.989
Arterial oxygen saturation, SaO2 (%)	96 (94–99)	98 (94–100)	0.459
Central venous oxygen saturation, ScvO2 (%)	75 (69–79)	74 (61–79)	0.468

Continuous variables are expressed as mean ± SD or median (interquartile range)

SBT spontaneous breathing trial, CVP central venous pressure

^ap values represent statistical comparisons between variables comparing groups by unpaired t-test or U-Mann Whitney test as appropriate