Abstract
We examined tolerability of preoperative neuropsychological testing (the Core Assessment Program for Surgical Interventional Therapies in Parkinson's Disease [CAPSIT-PD] protocol) for DBS. We also examined factors that may influence tolerability, including fatigue, global cognitive function, depression, and patient-based characteristics. In this retrospective study, we reviewed preoperative neuropsychological testing results from 35 patients who were scheduled to undergo DBS. We examined the overall tolerability of the full battery and the tolerability of each test. We placed attention on a test's placement in the fixed order of the battery to measure whether there was a clustering of poorly tolerated tests toward the end of the battery as an indication of fatigue. Spearman's rank correlation was used to determine the relationship between tolerability and (1) global cognitive function, (2) depression, and (3) patient-based characteristics. Fourteen subjects (40%) were able to tolerate the full battery and completed all 10 tests. The domains that were least tolerated pertained to executive function and procedural memory. There was a consistent time-based tolerability pattern that was observed. There was a significant correlation between tolerability and global cognitive function (ρ=0.344; P=0.043), but not depression (P=0.197). There was a significant correlation between tolerability and age (ρ=-0.491; P=0.003) and disease duration (ρ=-0.442; P=0.008), but not UPDRS-III scores (P=0.284). Our results have shown limited tolerability of the full neuropsychological battery as outlined by the CAPSIT-PD protocol. We suggest the consideration of updating the neuropsychological assessment used in the CAPSIT-PD protocol.
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