Table 3

Variation of case fatality rates with different methods of identifying cases

GPHospitalPaired GP/hospitalPooled GP/hospitalp Value
Myocardial infarction
 30-day case fatality rate (%)4206170.001
Ischaemic heart disease
 30-day case fatality rate (%)29380.002
Cerebrovascular disease
 30-day case fatality rate (%)6165100.001
  • The 30-day case fatality rates for myocardial infarction, ischaemic heart disease and cerebrovascular disease, identified using GP, hospital, paired GP/hospital and pooled GP/hospital data. The significance of the differences between coding methods is adjusted for confounding factors using logistic regression (see text for details).

  • GP, general practitioner.