Length of hospital stay is not only determined by baseline risk profiles of patients but is also highly dependent on hospital discharge policy, which seems to be unrelated to medical or logistical factors.
Claeys, M. J., Sinnaeve, P. R., Convens, C., Dubois, P., Boland, J., Vranckx, P., Gevaert, S., Coussement, P., Beauloye, C., Renard, M., Vrints, C., & Evrard, P. (2013). Inter-hospital variation in length of hospital stay after ST-elevation myocardial infarction: results from the Belgian STEMI registry. Acta Cardiologica : an international journal of cardiology, 68(3), 235-239. https://hdl.handle.net/2078.5/203552 (Original work published 2013)