TABLE 2.

A comparison of predicted and actual 90-day death rates in the Isbarn cohorts and our present cohort

	Observed rate of 90-day mortality
	Isbarn et al.		Present cohort
Nomogram predictions	Development cohort	Validation cohort	n, % (95% CI)
0–6%	2.4%	2.5%	853, 1.3% (0.6%, 2.3%)
6.1–12%	6.0%	6.0%	281, 7.1% (4.4%, 10.8%)
12.1–18%	14.7%	14.7%	6, 16.7% (0.4%, 64.1%)
18.1% or greater	26.2%	26.2%	1, n/aa

^aOnly one patient.