4. Discussion
In the present study, we examined the usefulness of TTCC for
screening of very mild AD and aMCI.The results of logistic
regression analysis showthat patients with very mildADtend
to respond incorrectly to TTCC 16 times as often as examinees
evaluated as normal when the rate of their incorrect
response is 1. As for the power of the TTCC to detect very
mild AD, sensitivity was 76%, and the specificity was 83%.
The lower sensitivity compared with results of an earlier study
[9] is likely due to the fact that subjects in the present study
were very mild AD compared with the mild AD examinees
of the former study.