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Results of IFA compared with virus isolation for 305 suspected cases of Lassa fever
| Virus isolation | No. IFA (% total cases)
|
||
|---|---|---|---|
| Negative | Positive | Total | |
| Negative | 223 (73.1) | 32 (10.5) | 255 (83.6) |
| Positive | 15 (4.9) | 35 (11.5) | 50 (16.4) |
| Total | 238 (78.0) | 67 (22.0) | 305 (100) |
Sensitivity (95% CI), 70% (range, 57 to 81%); specificity (95% CI), 88% (range 85 to 90%); positive predictive value (95% CI), 52% (range 43 to 60%); negative predictive value (95% CI), 94% (range 91 to 96%).
