Table 3.
Patients with hydroxychloroquine toxicity and their associated ICD-9 code(s),a n=53
| Toxic maculopathy % (n) | Background retinopathy % (n) | Drusen (degenerative) % (n) | Non-exudative AMD % (n) | Totalb % (n) | |
|---|---|---|---|---|---|
| Toxic maculopathy | 52.8 (28) | 5.66 (3) | 3.77 (2) | 3.77 (2) | 67.9 (36) |
| Background retinopathy | 5.66 (3) | 9.43 (5) | 1.89 (1) | 1.89 (1) | 18.9 (10) |
| Drusen (degenerative) | 3.77 (2) | 1.89 (1) | 1.89 (1) | 3.77 (2) | 13.2 (7) |
| Non-exudative AMD | 3.77 (2) | 1.89 (1) | 3.77 (2) | 13.2 (7) | 24.5 (13) |
Notes:
a
52.8% of the patients had only an ICD-9 code for toxic maculopathy, 5.66% of the patients carried a code for both toxic maculopathy and background retinopathy, 3.77% of the patients had a code for toxic maculopathy and drusen, etc.
b
In addition, one patient (1.89%) had three diagnoses: non-exudative AMD, toxic maculopathy, and drusen (degenerative).
Abbreviation: AMD, age-related macular degeneration.