Constructing a MultiMorbidity Index from Simulated Data Farrokh

Constructing a Multi-Morbidity Index from Simulated Data Farrokh Alemi, Ph. D.

Cases Controls Averages

Combination 1 3 4 5 6 7 8 10 2 9 11 12 13 14 15 16 MI MI CHF CHF DM DM DM AA AA AA DM DM DM AA AA MI DM AA Length of Number of stay Patients 5. 56 10 5. 54 10 3. 56 20 7. 03 30 5. 02 30 5. 04 30 7. 62 40 3. 03 40 4. 10 10 2. 03 40 2. 60 50 2. 57 50 0. 61 60 2. 12 70 0. 01 80 4. 57 120 MI = Myocardial Infarction; CHF = Congestive Heart Failure; DM=Diabetes Mellitus; AA=Alcohol abuse

Combination 1 3 4 5 6 7 8 10 2 9 11 12 13 14 15 16 MI MI CHF CHF DM DM DM AA AA AA DM DM DM AA AA MI DM AA Length of Number of stay Patients 5. 56 10 5. 54 10 3. 56 20 7. 03 30 5. 02 30 5. 04 30 7. 62 40 3. 03 40 4. 10 10 2. 03 40 2. 60 50 2. 57 50 0. 61 60 2. 12 70 0. 01 80 4. 57 120 MI = Myocardial Infarction; CHF = Congestive Heart Failure; DM=Diabetes Mellitus; AA=Alcohol abuse

If cell c 7 is CHF then assign a 1 otherwise a 0

Sum product of column H and F divided by sum of column H

Same as before, except now 1 minus column H

Calculate difference of cases and controls

Sum of product of diagnoses indicators and score for the diagnoses

3 Days is Shorter than length of stay specified by the patient’s severity