The effect of pressure support on imposed work of breathing during paediatric extubation readiness testing

Annals of Intensive Care

Table 3 Estimates of fixed effects

Dependent variable	Parameter	β	SE	Beta	t	p value
∆WOBimp	Baseline WOBimp	0.085	0.087	0.097	0.979	0.330
	ETT size	− 0.030	0.022	− 0.310	− 1.379	0.171
	Tinsp	0.069	0.123	0.086	0.561	0.576
	PIFR*	0.013	0.005	0.434	2.520	0.013
	VTe	0.018	0.010	0.191	0.085	0.085

The difference in imposed work of breathing between CPAP/PS and CPAP (∆WOBimp) was stated as dependent variable. The measured WOBimp during CPAP/PS was noted as baseline WOBimp. The effect of baseline WOBimp, endotracheal tube size (ETT size), inspiratory time (Tinsp), peak inspiratory flow rate (PIFR) and expired tidal volume (VTe) on ∆WOBimp was studied
A p value of < 0.05 (*) was denoted as statistically significant