Table 3.
Cases by comorbid retinal conditions
| Condition (ICD-9) | % cases: complex | % cases: standard | % cases: all |
|---|---|---|---|
| N | 5,709 | 73,240 | 78,949 |
| Diabetes | 4.1 | 2.7 | 2.9 |
| Diabetic retinopathy | 5.3 | 5.5 | 5.5 |
| Background (362.01) | 6.8 | 4.2 | 4.4 |
| Proliferative (362.02) | 0.0 | 6.4 | 5.7 |
| Nonproliferative (362.03) | 0.0 | 7.1 | 6.7 |
| Mild nonproliferative (362.04) | 4.5 | 5.0 | 5.0 |
| Moderate nonproliferative (362.05) | 0.0 | 7.5 | 7.0 |
| Severe nonproliferative (362.06) | 0.0 | 9.1 | 9.1 |
| Multiple diabetic retinopathy diagnoses | 8.7 | 7.9 | 7.9 |
| Epiretinal membrane | 10.4 | 5.5 | 5.7 |
| Retinal vein occlusion | 10.9 | 12.1 | 12.0 |
| Two or more conditions listed previouslya | 19.2 | 12.1 | 12.7 |
| None of the conditions listed previously | 2.8 | 1.4 | 1.5 |
Notes:
a
All patients with diabetic retinopathy were also assumed to have diabetes (even if it was not expressed in claims). This refers to other combinations of conditions.
Abbreviation: ICD-9, International Classification of Diseases, ninth edition.