Background information of study centres
| Centre | I | II | III | IV | V |
| Ownership type | Semicorporatised | Public | Public | Public | Corporatised |
| Year of initiation of PCI service | 1987 | 1994 | 2011 | 2010 | 1992 |
| Interventional cardiologist* | 5 | 3 | 1 | 1 | 15 |
| Fellow cardiologists* | 12 | 8 | 7 | 0 | 12 |
| Total hospital admission* | 34 414 | 29 336 | 1744 | 9340 | 8485 |
*During the study period of January–June 2014.
PCI, percutaneous coronary intervention.