Fig. 3From: Evaluating the cerebrospinal fluid tap test with the Hellström iNPH scale for patients with idiopathic normal pressure hydrocephalusCorrelation between changes from baseline at the CSF TT in the gait domain on the iNPH scale and change in the total iNPH scale score postoperatively, Spearman’s rho, r = 0.28, p ≤ 0.01. Distribution of true and false, positive and negative outcomes in the CSF TT with bold lines at the five-point levels of improvement. N = 116Back to article page