Statistics Summary

The records in the linkage system are derived from morbidity, mortality, midwives, birth, cancer, mental health, and electoral roll records. There can be more than one morbidity records or midwives' records for an individual, but only one cancer record or mental health record per person.

August 08 stats

  • The total number of records: 20,225,659
  • Total number of chains: 3,815,431
  • Maximum number of links in a chain: 3100
  • Average chain length: 5.30

Currently in the linkage system, there are;

  • Morbidity records: 16,678,026
  • Cancer registrations: 232,202
  • Mental health records: 365,923
  • Death records: 377,725
  • Electoral records: 1,862,918
  • Midwives records: 708,865

Some of these records will not be linked. This means there may only be 1 record in a chain.

Statistics current at 4 September 2008.