The use of a national and international coding schemes allows for the data held within the NCIS to be compared with death data held in other data collections.
The majority of data fields in the NCIS are based on the definitions outlined in the National Health Data Dictionary (NHDD). This ensures that fields such as Date of Birth, Sex, Indigenous Origin and Marital Status are consistent with other Australian data collections.
Classifications based on the International Classification of External Causes of Injury (ICECI) are used for the coding of:
- Mechanism of injury
- Mode of transport
- Objects or substances producing injury
- Sports and recreation
In certain instances it has been necessary to modify the ICECI to ensure codes reflect scenarios specific to the Australian and New Zealand context.
The relevant fields on the NCIS were updated to ICECI Version 1.2 in November 2007, with all data mapped to be compliant with this version.