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. Author manuscript; available in PMC: 2006 Jan 25.
Published in final edited form as: Neurosurgery. 2004 Sep;55(3):582–593. doi: 10.1227/01.neu.0000134385.23401.01

TABLE 4.

Ventricular volume response to valve pressure changes for those who experienced 100% (weighted response factor) improvement in symptomsa

Relationship of interest between valve pressure setting and ventricular volume Slope ± SD Intercept ± SD Correlation coefficient P value
Individual values of P and V across all subjects -0.487 ± 0.227 65.72 ± 23.8 0.466 P = 6.31E-05
Individual values of ΔP and corresponding values of ΔV across all subjects 0.279 ± 0.247 -3.582 ± 7.02 0.305 P = 2.77E-02
Average individual values of P and V within each subject 0.278 ± 0.73 32.49 ± 72.5 0.212 P = 4.31E-01
Average values for ΔP and ΔV within each subject 0.619 ± 0.226 3.111 ± 7.08 0.843 P = 4.13E-05
a

SD, standard deviation.