Table 1:
Demographic and CSF pressure-volume parameters for patients with clinical and imaging features of SIH, all of whom were suspected of having CVFa
| Total (n = 22) | Definite or Probable CVF (n = 8) | No CVF Identified (n = 14) | P Value | |
|---|---|---|---|---|
| Age (yr) | 57.3 | 60.0 | 55.8 | .5 |
| Sex | 59.1% F | 37.5% F | 71.4% F | .12 |
| Increase in relative pressure during normal saline infusion (cm H20) | 146.7% (SD, 17.3%) | 148.5% (SD, 17.9%) | 145.4% (SD, 27.0%) | .93 |
| Total volume infusion (mL) | 20.7 (SD, 1.8) | 27.6 (SD, 2.9) | 15.9 (SD, 4.1) | <.001 |
| CSC curves with abrupt pressure loss | 11/34 (32.4%) | 4/14 (28.6%) | 7/20 (35.0%) | .69 |
| Opening pressure (cm H20) | 11.6 (SD, 3.8) | 9.8 (SD, 0.9) | 12.8 (SD, 0.8) | .02 |
| PVIb (mL H20) | 63.9 (SD, 7.5) | 77.5 (SD, 10.3) | 54.3 (SD, 10.1) | .13 |
| Copc (mL/cm H20) | 2.6 (SD, 0.3) mL/cm H20 | 3.8 (SD, 0.5) mL/cm H20 | 1.8 (SD, 0.3) mL/cm H20 | <.001 |
| Overall compliance (linear slope of CSC curve) (mL/cm H20) | 2.0 (SD, 0.3) | 3.1 (SD, 0.6) | 1.3 (SD, 0.3) | .005 |
a
Eight patients had definite or probable CVF diagnosed on CTM, and the remaining cases (14/22) remain unconfirmed. All P values represent comparison of diagnosed-versus-undiagnosed groups. Data represent either proportions or mean values with standard deviation (SD).
b
Equation 1.
c
Equation 2.