Quociente intelectual pré-mórbido e o diagnóstico de comprometimento cognitivo em idosos.

In Brazil, there is heterogeneity in the quality of elementary education. Thus, if the adjustment of performance in neuropsychological tests is done by the number of years of schooling, it may result in false diagnoses in older adults. To counteract this limitation, an instrument such as the Brazilian Word Accentuation Test (WAT-Br) was created with the reasoning that the pre-morbid intelligence that is measured by the test would be a more accurate comparison parameter than the level of education to detect cognitive impairment. The aim of the study was to evaluate the stability of the WAT-Br at the early stages of cognitive impairment, comparing elderly people with cognitively normal performance (NCD), mild Alzheimer's disease (mild AD) and mild cognitive impairment amnestic (MCIa) and to evaluate the test -retest. The frequency pairing technique was used, 135 individuals were classified, after clinical and neuropsychological evaluation: NCD, MCIa and mild AD. A non-dementia subsample, provided for convenience, was recruited to verify test-retest reliability using the intraclass correlation coefficient. Stability of performance between the groups obtained (p = 0.603). A retest reliability test was evaluated after 12.7 (± 0.7) months, with an ICC of 0.97 (95%CI; 0.94 - 0.98). The WAT-Br presented to the early stages of cognitive impairment reaching the best diagnostic accuracy parameter. [ABSTRACT FROM AUTHOR]