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

Table 8 Conversion of 3541 cerebral SDH codes from AIS98 to AIS08 using two mapping techniques.

AIS08 code AIS98 code	140650.3 NFS	140651.3 Tiny (< 6 mm)	140652.4 Small (6-10 mm)	140654.4 Small bilateral	140655.5 Large (> 10 mm)	140656.5 Large bilateral
140650.4 NFS	606 569	- 10	- 27	- -	- -	- -
140652.4 Small (≤1 cm)	- -	- 251	1974 1723	- -	- -	- -
140654.5 Small bilateral	- -	- -	- -	329 298	- 31	- -
140656.5 Large (> 1 cm)	- -	- -	- -	- -	- -	632 632
Total at severity level	AIS08 level 3		AIS08 level 4		AIS08 level 5
	606 830		2303 2048		632 663

Results of mapping from AIS98 using the dictionary map are shown in bold; results using the dictionary map augmented by free text evaluation are shown in italics. For each AIS98 SDH code (rows), the number of AIS08 codes derived are shown.

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