Baseline characteristics of patients whose post-shunt MoCA did and did not exceed the reliable change threshold were compared. Reliable change thresholds for MoCA were derived using baseline visit to pre-TT/ELD assessment using nine different methodologies. Patients who were determined to be good candidates for shunts ( N = 71, 31.7%) took another MoCA assessment following shunt insertion. Methods: Patients ( N = 224) presenting with symptoms of iNPH were given a MoCA assessment at their first clinic visit, and also before and after tap test (TT) or extended lumbar drainage (ELD). Furthermore, we aimed to determine the likelihood that shunted patients will demonstrate significant improvement on the MoCA, and to identify possible predictors of this improvement. Objectives: We sought to estimate reliable change thresholds for the Montreal Cognitive Assessment (MoCA) for older adults with suspected Idiopathic Normal Pressure Hydrocephalus (iNPH). 3Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States.2Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States.1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States.Eric Wesner 1 *, Lacey Etzkorn 2 *, Shivani Bakre 2, Jinyu Chen 2, Alexander Davis 1, Yifan Zhang 2, Sevil Yasar 1, Aruna Rao 1, Mark Luciano 3, Jiangxia Wang 2 and Abhay Moghekar 1

Moca testing