Which co-morbidities really matter (at least in Scotland!)?

For over 1000 Scottish teaching hospital admissions, using univariate logistic regression: IHD, ALD, COPD, obesity, rheumatological disease, functional status and, just barely, age all impact upon unit or hospital death. Surprisingly many conditions such as DM, malignancy, tromboembolic disease, CVA and several others did not.