Table 2.

ROC-AUC values for the prediction of cognitive impairment class (MCI, GCI, and MCI with GCI) using acoustic features derived from single tasks.

-	MCI	GCI	MCI with GCI
Vowel utterance	0.5471 (±0.0116)	0.6206 (±0.0202) *	0.6315 (±0.0225)†
Tongue twister	0.5975 (±0.0095)	0.6237 (±0.0193) *	0.7057 (±0.0132) †‡
Diadochokinesis	0.5826 (±0.0114)	0.6113 (±0.0227) *	0.6951 (±0.0175) †‡
Short sentence	0.5853 (±0.0127)	0.6345 (±0.0160) *	0.7116 (±0.0190) †‡

*, ^†, ^‡: statistically significant difference (p < 0.001) between MCI and GCI; MCI and MCI with GCI; and GCI and MCI with GCI, respectively.