Table 2

 Clinical codes of patients in the database

n%
Myocardial infarction90816.3
Diabetes711.3
Fits/convulsions3325.9
Non-specific1542.8
Collapse, faint, unresponsive2173.9
Cardiac disease (confirmed)148826.7
Cardiac chest pain190.3
Respiratory disease (confirmed)4518.1
Respiratory symptoms180.3
Serious haemorrhage721.3
Cerebrovascular/CNS (confirmed)4167.5
Non cardiac chest pain4518.1
Poisoning3426.1
Asphyxia180.3
Other62611.2