Abstract
Background and Purpose: Our aim in this study was to assess whether the frontal assessment battery (FAB) could contribute to the differential diagnosis of cerebrospinal fluid tap test (CSFTT) responders and nonresponders with the hypothesis that CSFTT nonresponders had greater frontal lobe dysfunction. We also explored whether a relationship exists between FAB scores and gait disturbance in idiopathic normal-pressure hydrocephalus (INPH) patients. Methods: INPH subjects were selected in a consecutive order from a prospectively enrolled INPH registry. Fifty-one INPH patients constituted the final sample for analysis. Results: Logistic regression analysis using the FAB score as independent variable showed a significant influence of the FAB on the differential diagnosis of CSFTT responders and nonresponders (p = 0.025; OR 1.186; 95% CI 1.022-1.377). The FAB scores were negatively correlated with the Timed Up and Go test score (r = -0.382; p = 0.007), 10-meter walking test score (r = -0.351; p = 0.014), Gait Status Scale score (r = -0.382; p = 0.007), and INPH Grading Scale gait score (r = -0.370; p = 0.009). Conclusions: Our findings may indicate a possibility for considering FAB scores in patients with ventriculomegaly as potential cognitive markers for the prediction of CSFTT response. Association between gait function and FAB scores suggests the involvement of similar circuits producing gait symptom and frontal lobe functions in INPH.
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