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. Author manuscript; available in PMC: 2015 Dec 13.
Published in final edited form as: J Neurosurg. 2015 Mar 20;122(5):1120–1126. doi: 10.3171/2014.9.JNS132882

TABLE 4.

Analysis of the numbers of patients who required a shunt after EVD treatment

Shunt Required
Study Period Yes No Total p Value*
Period 1 81 328 409
Period 2 21 114 135
Total 102 442 544 0.2728
*

Chi-square test.