TABLE II.
Independent variables for the five models.
| Variables | Model_1 | Model_2 | Model_3 | Model_4 | Our model | |
|---|---|---|---|---|---|---|
| Age | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Gender | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Lab variables* | 25-OH Vitamin D | ✓ | ✓ | |||
| Bicarbonate | ✓ | ✓ | ✓ | |||
| Calcium | ✓ | ✓ | ✓ | |||
| Hematocrit | ✓ | ✓ | ||||
| Potassium | ✓ | ✓ | ||||
| Sodium | ✓ | ✓ | ||||
| Total Protein | ✓ | ✓ | ✓ | |||
| Parathyroid Hormone |
✓ | ✓ | ✓ | |||
| Triglyceride | ✓ | ✓ | ||||
| Urine Protein Creatinine | ✓ | ✓ | ✓ | |||
| Uric Acid | ✓ | ✓ | ||||
| Causes of ESRD | Diabetes | ✓ | ||||
| Glomeru-lonephritis | ✓ | |||||
| Secondary GN | ✓ | |||||
| Interstital Nephritis | ✓ | |||||
| Hypertension | ✓ | |||||
| Cystic, Hereditary | ✓ | |||||
| Neoplasms | ✓ | |||||
| Miscellaneous Conditions | ✓ | |||||
| ICD-9 codes | ✓ | |||||
| Clusters | ✓ | |||||
*
BUN, Chloride, Magnesium, and Phosphate are not included, as ICD-9 codes could not distinguish the low or high values of these variables.