Table 1.

For 86,878 patients in NTDB whose injuries were coded using ICD-10-CM, observed mortality(%) for categories of Injury Severity Score (ISS) using the methods described: Recorded by NTDB trauma registrars (ISSAIS), or estimated by ICDPIC-R (GEMmax, GEMmin, and ROCmax). For 66,417 patients in NIS, observed mortality for the last three of these categories

	ISSAIS	GEMmax	GEMmin	ROCmax
Calculated ISS	National Trauma Data Bank
1–8	1.1	1.5	1.6	0.8
9–15	2.4	3.0	3.1	3.0
16–24	6.4	5.0	6.3	8.5
25–40	27.4	22.7	31.0	29.0
41–49	40.4	34.6	41.8	49.8
50–75	62.1	54.5	53.6	65.5
Unknown	4.9	2.2	2.2	0.0
Calculated ISS	National Inpatient Sample
1–8		0.7	0.8	0.8
9–15		2.1	2.1	2.4
16–24		4.5	5.8	7.3
25–40		16.7	25.0	16.5
41–49		24.3	20.0	23.5
50–75		33.3	32.3	36.8
Unknown		2.5	2.5	0.0