Characteristics of the cohorts and HCQ practices
| Percentage of patients with SLE prescribed HCQ, n (%) | |
| 60%–75% | 12 (18.7) |
| >75% | 52 (81.3) |
| Number of patients with SLE with retina toxicity, n (%) | |
| 0 | 8 (12.5) |
| 1–5 | 27 (42.2) |
| 6–10 | 17 (26.5) |
| 11–50 | 12 (18.8) |
| Typical HCQ dose, n (%) | |
| 200–400 mg/day | 22 (34.4) |
| 400 mg/day | 22 (34.4) |
| 5 mg/kg/day | 15 (23.4) |
| 5–6.5 mg/kg/day | 5 (7.8) |
| Maximum HCQ dose, n (%) | |
| 200 mg/day | 1 (1.5) |
| 400 mg/day | 44 (68.8) |
| 600 mg/day | 11 (17.2) |
| 5 mg/kg/day | 1 (1.6) |
| 6 mg/kg/day | 3 (4.7) |
| 6.5 mg/kg/day | 4 (6.2) |
HCQ, hydroxychloroquine.