Table 4

Baseline and CMR characteristics of patients who did and did not have CMR in hospitals A and B

Patients who had CMR (n=189)Patients who did not have CMR (n=846)SMD*
Age (mean, SD)†61.8 (11.7)65.1 (12.8)0.26
Male sex121/154 (79%)574/747 (77%)0.04
Current smoker52/168 (31%)234/732 (32%)0.02
IMD score (median; IQR)‡12.4 (7.5–23.5)13.5 (7.8–26.3)0.08
Diabetes19/176 (11%)105/767 (14%)0.09
Hypertension63/166 (38%)254/735 (35%)0.07
Previous PCI18/176 (10%)88/767 (11%)0.04
Previous CABG3/176 (2%)25/771 (3%)0.09
Previous MI20/174 (11%)108/773 (14%)0.07
PPCI140/154 (91%)677/744 (91%)0.003
No PPCI14/154 (9%)67/744 (9%)0.003
Length of stay (median; IQR) days§2 (2–3)3 (2–3)0.11
  • Values are numbers (percentages) unless otherwise stated.

  • *SMDs can be interpreted as follows: values of 0.20 are ‘small’ in magnitude, those around 0.50 are ‘medium’ and those around or above 0.80 are ‘large’.27

  • Missing data (patients who had CMR, patients who did not have CMR):

  • †Two patients (1, 1).

  • ‡One hundred and eighty patients (43, 137).

  • §One hundred and twelve patients (32, 80).

  • CABG, coronary artery bypass grafting; CMR, cardiovascular magnetic resonance; IMD, Index of Multiple Deprivation (low value reflects low level of multiple deprivation); MI, myocardial infarction; PCI, percutaneous coronary intervention; PPCI, primary percutaneous coronary intervention; SMD, standardised mean difference.