Table 3:
Summary of features of CSF velocity time-profile in participants with syrinx and controls at the base of the skull and syrinx spinal levela
| Base of Skull |
Syrinx Spinal Level |
|||||
|---|---|---|---|---|---|---|
| Patients with Syrinx | Controls | P Value | Patients with Syrinx | Controls | P Value | |
| Timing of peak cranial velocity | 8.8 (2.3) | 4.2 (5.2) | .21 | 8.8 (2.5) | 8.3 (4.5) | .4 |
| Timing of peak caudal velocity | 2.3 (0.9) | 3.7 (1.2) | .07 | 2.3 (1.1) | 3.6 (0.7) | .03 |
| Duration of caudal flow | 3.5 (0.9) | 5.4 (0.5) | .05 | 3.5 (0.5) | 4.9 (0.6) | .003 |
| Onset time of caudal flow | 1.3 (0.5) | 1.6 (0.4) | .15 | 1.0 (0.2) | 1.7 (0.4) | .002 |
| Time of return to cranial flow | 4.8 (1.3) | 7 (0.9) | .04 | 4.6 (0.6) | 6.6 (0.9) | .002 |
| Peak cranial velocity (cm/s) | 0.6 (0.2) | 1.3 (0.3) | .01 | 0.6 (0.3) | 2.0 (0.5) | .00004 |
| Peak caudal velocity (cm/s) | 1.1 (0.2) | 1.7 (0.2) | .03 | 1.6 (0.9) | 3.2 (0.7) | .007 |
a
Data are mean (SD). All temporal features are expressed as % R-R interval. P values are from unpaired t tests between participants with syrinx and controls.