... 3Relationship of Time of Follow-up and APOE-4 to Memory,Visuospatial and Language Performance in Healthy Elderly Over 7years*Variable EstimatedStandarderrorRobust z SignificanceMemory Factor Time ... Physicians and Surgeons, New York, New York, USAcDepartment of Pathology, School of Public Health, Columbia University College of Physicians and Surgeons, New York, New York, USAdDepartment of Psychiatry, ... Columbia University College of Physicians and Surgeons, New York, New York, USAfDivision of Epidemiology, School of Public Health, Columbia University College of Physicians and Surgeons, New York,...