Table 2

Variation of patient characteristics with different methods of identifying cases

GPHospitalPaired GP/hospitalPooled GP/hospitalp Value
Myocardial infarction
 ACE inhibitor/ARB (%)687777710.30
 β-blocker (%)686159610.50
 Calcium channel blocker (%)10108150.29
 Diuretic (%)323228290.87
 Nitrate (%)466159550.065
 Statin (%)798177760.70
 Antiplatelet agent (%)848285780.43
Ischaemic heart disease
 ACE inhibitor/ARB (%)484858450.013
 β-blocker (%)575462490.005
 Calcium channel blocker (%)212125190.28
 Diuretic (%)353034330.57
 Nitrate (%)40436040<0.001
 Statin (%)67678263<0.001
 Antiplatelet agent (%)71718766<0.001
Cerebrovascular disease
 ACE inhibitor/ARB (%)383331360.42
 β-blocker (%)251922190.16
 Calcium channel blocker (%)201513170.27
 Diuretic (%)323332330.99
 Nitrate (%)151415130.94
 Statin (%)564153500.006
 Antiplatelet agent (%)544450550.022
  • The 30-day prescribing rates for myocardial infarction, ischaemic heart disease and cerebrovascular disease, identified using GP, hospital, paired GP/hospital and pooled GP/hospital data. Patients are those alive at 30 days, and this is reflected by lower numbers of patients than in tables 1 and 3. Significant differences are calculated by χ2 test.

  • ARB, angiotensin receptor blocker; GP, general practitioner.