Patient and Hospital Characteristics of CAG and MPI in South Korea Between 2009 and 2013
| Characteristic | July 2009 to June 2010 | July 2010 to June 2011 | July 2011 to June 2012 | July 2012 to June 2013 | P |
| CAG | |||||
| Age (y) | 60.0 ± 12.2 | 60.4 ± 12.1 | 60.9 ± 12.1 | 60.9 ± 12.1 | <0.001 |
| Age groups (y) | <0.001 | ||||
| <55 | 8,184 (34.1) | 9,162 (32.5) | 9,719 (30.8) | 10,301 (30.9) | |
| 55–64 | 6,722 (28.0) | 8,048 (28.6) | 9,388 (29.7) | 9,825 (29.4) | |
| ≥65 | 9,079 (37.9) | 10,983 (39.0) | 12,476 (39.5) | 13,247 (39.7) | |
| Male sex (n) | 12,881 (53.7) | 15,259 (54.1) | 17,321 (54.8) | 18,451 (55.3) | 0.001 |
| No. of hospitals providing a procedure | 154 | 157 | 161 | 174 | |
| Procedure volume of a hospital, per year | 155.7 ± 174.3 | 179.6 ± 189.7 | 196.2 ± 188.7 | 191.8 ± 182.9 | 0.047 |
| MPI | |||||
| Age (y) | 61.0 ± 12.2 | 61.5 ± 12.1 | 62.0 ± 12.3 | 62.9 ± 12.3 | <0.001 |
| Age groups (y) | <0.001 | ||||
| <55 | 1,910 (29.9) | 1,610 (29.2) | 1,153 (27.2) | 928 (24.5) | |
| 55–64 | 1,704 (26.7) | 1,448 (26.3) | 1,171 (27.6) | 1,013 (26.7) | |
| ≥65 | 2,775 (43.4) | 2,455 (44.5) | 1,916 (45.2) | 1,849 (48.8) | |
| Male sex (n) | 3,237 (50.7) | 2,925 (53.1) | 2,298 (54.2) | 1,962 (51.8) | 0.002 |
| No. of hospitals providing a procedure | 59 | 56 | 54 | 54 | |
| Procedure volume of a hospital, per year | 108.3 ± 499.7 | 98.4 ± 479.7 | 78.5 ± 365.2 | 70.2 ± 310.1 | 0.537 |
Data are expressed as n, with percentages in parentheses, and mean ± SD.