TABLE 5. Top 10 Event Codes Ranked in Order of Importance as Determined by Random Forest.
| Importance | Event CD | Definition |
|---|---|---|
| 0.0164 | 44M3. | Serum total protein |
| 0.0162 | 42L.. | Basophil count |
| 0.0136 | 44D6. | Liver function test |
| 0.0112 | 44M4. | Serum albumin |
| 0.0100 | 451E. | GFR calculated abbreviated MDRD |
| 0.0085 | 44P5. | Serum HDL cholesterol level |
| 0.0083 | 44I5. | Serum sodium |
| 0.0083 | 44I8. | Serum calcium |
| 0.0080 | 1Z12. | Chronic kidney disease stage 3 |
| 0.0071 | 9N36. | Letter from specialist |
Whilst RF highlighted entirely separate features of importance compared to ECNN, several event codes can be hypothesised to indicate similar clinical significance. For instance, serum calcium indicates the use of calcium level blood tests potentially related to the dispensing of Adcal-D3 tablets as indicated by ECNN. Similar indications can be found with cholesterol level and the dispensing of Simvastatin. Interestingly, a high focus on blood work is shown with 8 of the top 10 event codes shown being lab results of blood work.