TABLE 3.
Subgroup Comparison of MLBS at Last Follow-Up With Nonshunted Patients
| Subgroup | MLBS at last follow-up (mm) | Difference | F-value | P-valuea |
|---|---|---|---|---|
| Higher opening pressure (n = 7) | 10.6 ± 7.6 | 0.9 | F (1, 50) = 0.0 | .834 |
| Lower opening pressure (n = 16) | 18.7 ± 9.2 | 9.0 | F (1, 58) = 12.9 | .001b |
| Programmable shunts (n = 8) | 11.2 ± 8.4 | 1.5 | F (1, 51) = 0.0 | .912 |
| Nonprogrammable shunts (n = 15) | 18.9 ± 8.9 | 9.2 | F (1, 57) = 14.8 | <.001b |
MLBS, midline brain shift.
a
Comparisons based on analysis of covariance controlling for time from hemispheric surgery to imaging study and initial posthemispheric surgery MLBS.
MLBS values are presented as mean ± standard deviation, and the difference is calculated relative to the nonshunted patient cohort.
b
p < .05.