Table 2. Methods for evaluating spontaneous ventilation ability.

Methods		n (%)	IC95%
Evaluation of the ability to breathe spontaneously * (n = 138)
	GRVS + SBT	65 (47.1)	38.6 - 55.8
	SBT	37 (26.8)	19.6 - 35.0
	GRVS	36 (26.1)	19.0 - 34.2
Methods for SBT † (n = 37)
	PS above PEEP	16 (43.2)	27.1 - 60.5
	T-piece	13 (27.0)	20.2 - 52.5
	PS according to the ETT diameter	10 (27.0)	13.8 - 44.2
	CPAP	2 (5.4)	0.7 - 18.2
Methods for the GRVS † # n = 35 ‡
	Gradual reduction of PS	17 (48.6)	30.4 - 64.5
	Respiratory rate gradual reduction while on SIMV	15 (42.9)	25.5 - 59.2
	VSV	14 (40.0)	23.1 - 56.5
	Others	1 (2.8)	0.7 - 14.5

IC95% - 95% confidence interval; GRVS - gradual reduction in ventilatory support; SBT - spontaneous breathing trial; PS - pressure support; ETT - endotracheal tube; PEEP - positive end-expiratory pressure; CPAP - continuous positive airway pressure; SIMV - synchronized intermittent mandatory ventilation; VSV - volume support ventilation.

^*Total sample size;

^†multiple responses were allowed;

^‡the sample size was 36, but one response was missing.