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CSF parameter comparison
| Sensitivity | Specificity | PPV | NPV | + LR | − LR | |
|---|---|---|---|---|---|---|
| Elevated WBC | 89.3 | 81.7 | 1.8 | 99.9 | 4.9 | 0.1 |
| Elevated protein | 92.6 | 75.7 | 1.5 | 100.0 | 3.8 | 0.1 |
| Low glucose | 60.7 | 95.7 | 5.4 | 99.8 | 14.0 | 0.4 |
| Any abnormal value | 96.7 | 67.2 | 1.1 | 100.0 | 3.0 | 0.1 |
| All values abnormal | 58.3 | 98.2 | 11.1 | 99.8 | 32.0 | 0.4 |
PPV (positive predictive value), NPV (negative predictive value), +LR (positive likelihood ratio), −LR (negative likelihood ratio)
