Table 1.
Features from the ADNI data set used to train the machine learning models
| Variable | Meaning | 8-Feature training group | 11-Feature training group | 15-Feature training group |
|---|---|---|---|---|
| DX | Earlier diagnosis | X | X | X |
| ADAS13 | 13-item Alzheimer's Disease Assessment Scale | X | X | X |
| Ventricles | Ventricular volume | X | X | X |
| AGE | Age | X | X | X |
| FAQ | Functional Activities Questionnaire | X | X | |
| PTRACCAT | Race | X | X | X |
| Hippocampus | Hippocampal volume | X | X | X |
| APOE4 | # of ε4 alleles of APOE | X | X | X |
| MMSE | Mini-Mental State Examination | X | X | |
| ADAS11 | 11-item Alzheimer's Disease Assessment Scale | X | X | |
| RAVLT_immed | Rey Auditory Verbal Learning Test— total number of words memorized over 5 trials | X | ||
| RAVLT_learn | Rey Auditory Verbal Learning Test— number of words learned between trial 1 and trial 5 | X | ||
| RAVLT_forg | Rey Auditory Verbal Learning Test— number of words forgotten between trial 5 and trial 6 | X | ||
| RAVLT_perc_forg | Rey Auditory Verbal Learning Test— percentage of words forgotten between trial 5 and trial 6 | X | ||
| N/A | Time difference | X | X | X |
Abbreviation: ADNI, Alzheimer's Disease Neuroimaging Initiative.