Cognition in the Oldest Old Using the NIH Toolbox

The percentage of cognitively intact older adults living into their 80s and beyond is growing rapidly. This age group is not only one of the fastest growing segments of the population, but it is also the group most susceptible to developing dementia. Effective detection of early cognitive decline is paramount but is complicated by a dearth of normative data for older adults above the age of 85. It is well‐established that crystallized cognition remains stable into older adulthood, whereas fluid cognition tends to decrease; however, it is unknown whether the same holds true for the oldest old. We use the comprehensive NIH Toolbox Cognition Battery (NIHTB‐CB) to assess differences in cognition.