Correlation between the results of ELD and outcome after shunting
| Outcome after ELD | SR+ | SR− | Total |
|---|---|---|---|
| ELD, External lumbar drainage; ELD+, improvement after ELD; ELD−, no improvement after ELD; SR+, improved after shunting; SR−, not improved after shunting; sensitivity, 50% (95% CI 31–69); specificity, 80% (95% CI 44–97); positive predictive value of ELD, 87% (95% CI 62–98); negative predictive value of ELD, 36% (95% CI 17–59). | |||
| ELD+ | 14 | 2 | 16 |
| ELD− | 14 | 8 | 22 |
| Total | 28 | 10 | 38 |