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Pooled Sensitivity and Specificity for All 5 Graders by Symptom Duration (Split by Quartile)
| Organism | Symptom Duration | Sensitivity (%) | Specificity (%) |
|---|---|---|---|
| Fungal keratitis | Q1: ≤4 days | 95 (88–98) | 53 (39–66) |
| Q2: 5–7 days | 86 (81–90) | 75 (64–84) | |
| Q3: 8–10 days | 91 (85–95) | 96 (84–99) | |
| Q4: >10 days | 72 (64–78) | 91 (84–95) | |
| Acanthamoeba keratitis | Q1: <20 days | 82 (34–98) | 98 (95–99) |
| Q2: 20–30 days | 98 (53–100) | 96 (76–100) | |
| Q3&4: >30 days | 83 (68–92) | 96 (76–99) |
