Figure 2
From: Noninvasive prediction of shunt operation outcome in idiopathic normal pressure hydrocephalus
Distributions of the discriminant score in responders and non-responders.
Using beta NPVs at Fp2, T4 and O2 electrodes as discriminating variables, linear discriminant analysis yielded a discriminant score that separates responders and non-responders. With zero as the cut-off value, a discriminant score > 0 indicates shunt responders and a discriminant score < 0 indicates non-responders. This score could correctly identify responders and shunt non-responders with a positive predictive value of 80% (8/10) and a negative predictive value of 88% (7/8).
