Table 8

Comparison of different mortality prediction models

Patient group	Institutions	Patient group size - validation set included	Study period	Data collection period	End point	Sensitivity at 0.74 specificity	Area under ROC curve for validation sample	Name of score (reference)
Inborn 501-1500 g	7	3603	1987-9	Pre- and perinatal	Death	^8-1590.77	0.82	Horbar 1993
< 1500 g and ventilated; patients who died in the first 12 h or had severe congenital malformations were excluded	2	262	1983-9	Pre-, peri-, and neonatal (12 h)	Death > 12 h	0.81		Tarnow 1990
Newborns; late readmitted and moribund patients excluded	3	1621	1989-90	Neonatal (24 h)	Death	^8-1590.88	0.90 (0.82^8-151)	SNAP (Richardson 1993)
Newborns; late readmitted and moribund patients excluded	3	1621	1989-90	Peri- and neonatal (24 h)	Death	^8-1590.91	0.93 (0.79^8-151)	SNAP-PE (Richards 1993)
< 1500 g or < 31 weeks gestation; lethal congenital malformations excluded	4	1201	1988-90	Pre-, peri-, and neonatal (12 h)	Death	^8-1590.87	0.90	CRIB (INN 1993)
< 1501 g or < 32 weeks gestation	1	890	1990-6	Pre- and perinatal	Neonatal death	0.99	0.95	This article

↵8-159 : about;
↵8-151 according to Rantonenet al (1994)29 Prenatal: input data collection from conception until labour Perinatal: input data collection from labour until admission (admission data included) Neonatal: input data collection after admission (time span as indicated)