Volumetry results for different intracranial compartmentsa
| Before Surgery | After Surgical Closure of Spinal Dural Tear | Difference: Absolute and Relative | P Value | Measurement Uncertainty | |
|---|---|---|---|---|---|
| SIH score | 6.9 ± 2.2 | 2.9 ± 1.7 | <.001 | ||
| Ventricular CSF (mL) | 15.3 ± 6.3 | 18.0 ± 7.4 | +2.7 (+18.8%) | <.001 | 0.2 |
| Lateral ventricle (mL) | 12.9 ± 5.9 | 15.2 ± 6.9 | +2.3 (+18.7%) | <.001 | 0.2 |
| Third ventricle (mL) | 0.8 ± 0.4 | 1.0 ± 0.3 | +0.2 (+25.5%) | <.001 | 0.02 |
| Fourth ventricle (mL) | 1.5 ± 0.4 | 1.8 ± 0.4 | +0.3 (+20.9%) | .008 | 0.05 |
| Total brain parenchyma (mL) | 1136.9 ± 116.6 | 1133.1 ± 111.0 | −3.8 (−0.3%) | .58 | 7.6 |
| Gray matter (mL) | 652.0 ± 73.7 | 644.8 ± 64.3 | −7.2 (−0.9%) | .18 | 7.3 |
| White matter (mL) | 458.7 ± 53.0 | 462.4 ± 54.9 | +3.7 (+0.8%) | .27 | 10.8 |
| Brain stem | 22.9 ± 3.6 | 22.7 ± 3.5 | −0.2 (−0.9%) | .34 | 0.2 |
↵a Measurements show the mean volume in milliliters; the only exception is the SIH score in the first line.