A Predictive Model for Acute Respiratory Distress Syndrome Mortality Using Red Cell Distribution Width

Table 3

Measures of discrimination and predictive ability.

	Outcome	Category	Base model	Base model + RDW	Comparison value (95% CI)	p-value
AUC	ICU mortality		0.758	0.784	0.026 (0.000, 0.052)	0.048
	In-hospital mortality		0.746	0.784	0.038 (0.007, 0.069)	0.02
	90-day mortality		0.755	0.793	0.039 (0.008, 0.069)	0.01
Net reclassification improvement (NRI)				Net % improvement	NRI (95% CI)
	ICU mortality	Died	Reference	2%	0.463 (0.238–0.687)	0.001
		Survived	Reference	44%
	In-hospital mortality	Died	Reference	10%	0.475 (0.258, 0.692)	<0.0001
		Survived	Reference	37%
	90-day mortality	Died	Reference	1%	0.522 (0.311–0.733)	<0.001
		Survived	Reference	51%
Integrated discrimination improvement (IDI)			Model average prediction	Model average prediction	IDI (95% CI)
	ICU mortality	Died	0.478	0.498	0.032 (0.010–0.054)	0.005
		Survived	0.290	0.279
	In-hospital mortality	Died	0.541	0.571	0.054 (0.029–0.080)	<0.001
		Survived	0.363	0.339
	90-day mortality	Died	0.556	0.588	0.060 (0.033–0.086)	<0.001
		Survived	0.365	0.339