Clinical determinants of length of hospital stay following acute myocardial infarction
| Variable | Geometric mean length of stay (days) | 95% CI | p Value for difference (adjusted) | |
|---|---|---|---|---|
| CI, confidence interval. | ||||
| Age (years) | <55 | 7.15 | 6.83 to 7.47 | 0.0001 |
| 55–65 | 7.36 | 7.07 to 7.66 | ||
| 65–75 | 7.75 | 7.39 to 8.12 | ||
| 75+ | 8.64 | 8.14 to 9.17 | ||
| Sex | Male | 7.40 | 7.21 to 7.60 | 0.012 |
| Female | 8.30 | 7.90 to 8.71 | ||
| Year of admission | 1988–90 | 11.01 | 10.60 to 11.44 | <0.0001 |
| 1991–93 | 7.79 | 7.48 to 8.11 | ||
| 1994–96 | 7.12 | 6.83 to 7.42 | ||
| 1997–99 | 6.45 | 6.18 to 6.74 | ||
| Smoking | Never | 7.52 | 7.22 to 7.84 | 0.13 |
| Ex | 7.93 | 7.49 to 8.40 | ||
| Current | 7.54 | 7.30 to 7.79 | ||
| Diabetes | Yes | 8.10 | 7.69 to 8.53 | 0.058 |
| No | 7.48 | 7.28 to 7.68 | ||
| Atrial fibrillation | Yes | 9.93 | 9.16 to 10.76 | 0.0002 |
| No | 7.39 | 7.21 to 7.57 | ||
| Hypertension | Yes | 7.80 | 7.47 to 8.14 | 0.12 |
| No | 7.50 | 7.29 to 7.71 | ||
| Stroke | Yes | 12.87 | 9.02 to 18.36 | <0.0001 |
| No | 7.57 | 7.39 to 7.75 | ||
| Ventricular fibrillation | Yes | 9.79 | 8.75 to 10.95 | 0.012 |
| No | 7.49 | 7.31 to 7.67 | ||
| Left ventricular failure | Yes | 9.72 | 9.26 to 10.21 | <0.0001 |
| No | 6.99 | 6.81 to 7.17 | ||
| Peak creatinine kinase (IU/l) | <500 | 7.25 | 6.90 to 7.60 | 0.012 |
| 500–1000 | 7.03 | 6.71 to 7.37 | ||
| 1000–1500 | 7.88 | 7.57 to 8.21 | ||
| 1500+ | 8.43 | 7.99 to 8.88 | ||