Assessment of the effects and limitations of the 1998 to 2008 Abbreviated Injury Scale map using a large population-based dataset

Table 1 AIS severity changes for AIS98 dictionary codes and VSTR dataset injuries when mapping to AIS08.

AIS injury severity	AIS98 dictionary codes		VSTR dataset injuries		Overall chi square
AIS injury severity	Codes	Incidence	Injuries	Incidence	Overall chi square
Same in AIS08	1109*	82.7%	95419	74.4%	Χ² = 188.25; p < 0.001
Increases in AIS08	9 *	0.7%	65	0.1%
Decreases in AIS08	61 *	4.5%	16318	12.7%
Multiple mapping options in AIS08 (available options have different severity levels)	9 *	0.7%	2945	2.3%
No map currently available (no AIS08 map in dictionary map)	153	11.4%	13533	10.5%
Total	1341	100.0%	128280	100.0%

* = p < 0.01 on examination of standardised residuals for Χ² test (|z score| >2.58)

ISSN: 1757-7241