Fig. 1.

Flowchart representing the study participants and data cleaning. 181 healthy volunteers, outpatients and their partners aged between 60 and 80 years were recruited and diagnosed in the Memory Clinic. After fNIRS measurement of enrolled 156 participants, 63 subject data were selected according to the inclusion and exclusion criteria, and randomly assigned in a ratio of 2:1 to two data sets as follows: 42 to the training data set and 21 to the test data set. MCI, mild cognitive impairment; NDC, non-dementia control.