Factors associated with 30-day mortality after AMI hospitalisation, according to a multilevel model
| Variables | OR | 95% CI | |
|---|---|---|---|
| Inpatient-level variables | |||
| Major diagnosis | |||
| Acute transmural myocardial infarction of anterior wall | 1.463 | 1.039 | 2.061 |
| Acute transmural myocardial infarction of inferior wall | 1.000 | – | – |
| Acute transmural myocardial infarction of other sites | 2.032 | 1.062 | 3.887 |
| Acute transmural myocardial infarction of unspecified sites | 2.451 | 1.729 | 3.475 |
| Acute subendocardial myocardial infarction | 1.190 | 0.866 | 1.637 |
| Acute myocardial infarction, unspecified | 1.986 | 1.494 | 2.640 |
| Charlson Comorbidity Index | |||
| 0 | 1.000 | – | – |
| 1 | 1.045 | 0.657 | 1.663 |
| 2 | 0.985 | 0.621 | 1.562 |
| 3+ | 2.016 | 1.293 | 3.143 |
| Sex | |||
| Male | 1.000 | – | – |
| Female | 1.426 | 1.244 | 1.635 |
| Type of insurance coverage | |||
| NHI | 1.000 | – | – |
| Medical Aid | 1.222 | 0.998 | 1.497 |
| Age (years) | |||
| <65 | 1.000 | – | – |
| ≥65 | 3.359 | 2.724 | 4.141 |
| Year of hospitalisation | |||
| 2010 | 1.000 | – | – |
| 2011 | 0.790 | 0.646 | 0.965 |
| 2012 | 0.770 | 0.633 | 0.936 |
| 2013 | 0.813 | 0.654 | 1.011 |
| Hospital-level variables | |||
| Hospital volume | |||
| 1st quartile (<368 cases; 92 hospitals) | 1.000 | – | – |
| 2nd quartile (368–604 cases; 10 hospitals) | 0.811 | 0.658 | 0.998 |
| 3rd quartile (605–1213 cases; 8 hospitals) | 0.648 | 0.500 | 0.840 |
| 4th quartile (≥1214 cases≥; 4 hospitals) | 0.807 | 0.573 | 1.138 |
| Specialist proportion | |||
| Below median (<58.62%; 18 hospitals) | 1.000 | – | – |
| Above median (≥58.62%; 96 hospitals) | 0.789 | 0.663 | 0.940 |
| Number of cardiothoracic medicine specialists | |||
| Below median (<3; 98 hospitals) | 1.000 | – | – |
| Above median (≥3; 16 hospitals) | 1.013 | 0.842 | 1.219 |
| Number of emergency medicine specialists | |||
| Below median (<5; 95 hospitals) | 1.000 | – | – |
| Above median (≥5; 19 hospitals) | 0.760 | 0.619 | 0.933 |
| Number of beds | |||
| Below median (<617; 100 hospitals) | 1.000 | – | – |
| Above median (≥617; 14 hospitals) | 0.882 | 0.677 | 1.151 |
| Number of ICU beds | |||
| Below median (<49; 101 hospitals) | 1.000 | – | – |
| Above median (≥49; 13 hospitals) | 1.091 | 0.861 | 1.383 |
| Number of ER beds | |||
| Below median (<30; 99 hospitals) | 1.000 | – | – |
| Above median (≥30; 15 hospitals) | 0.862 | 0.693 | 1.073 |
| Teaching status | |||
| Non-teaching hospital (71 hospitals) | 1.000 | – | – |
| Teaching hospital (43 hospitals) | 0.716 | 0.570 | 0.900 |
| Ownership | |||
| Public (31 hospitals) | 1.000 | – | – |
| Private (83 hospitals) | 0.781 | 0.626 | 0.976 |
| Region | |||
| Metropolitan (36 hospitals) | 1.000 | – | – |
| Others (78 hospitals) | 0.854 | 0.732 | 0.995 |
Statistically significant results are shown in bold typeface. AMI, acute myocardial infarction; ICU, intensive care unit; NHI, National Health Insurance.