Patients with Mild Cognitive Impairment Display Reduced Auditory Event-Related Delta Oscillatory Responses

Table 1

Demographic and neuropsychological details of study subjects.

	Controls (𝑁=21); Mean (SD)	MCI (𝑁=22); Mean (SD)	P
Age (SD)	70.3 (6.5)	74.0 (7.0)	0.08^a
Education (SD)	9.3 (5.0)	9.1 (5.1)	0.91^a
Gender (M/F)	8/13	13/9	0.17^b
MMSE	28.7 (1.9)	24.9 (3.0)	𝟎.𝟎𝟎𝟎^a
ÖVPMT (short-term memory)	104.5 (13.2)	68.7 (13.2)	𝟎.𝟎𝟎𝟎^a
ÖVPMT (free recall)	12.4 (1.7)	4.8 (3.2)	𝟎.𝟎𝟎𝟎^a
ÖVPMT (recognition)	14.8 (0.5)	13.7 (1.3)	𝟎.𝟎𝟎𝟐^a
Digit span forward	4.8 (1.1)	4.9 (0.88)	0.65^a
Digit span backward	3.8 (1.3)	3.3 (0.7)	0.17^a
Verbal fluency (animal list)	21.3 (4.3)	16.7 (4.5)	𝟎.𝟎𝟎𝟑^a
Stroop interference (sec)	54.7 (14.1)	85.3 (46.8)	𝟎.𝟎𝟏𝟑^a

MCI: mild cognitive impairment; MMSE: mini-mental state examination; ÖVPMT: Öktem Verbal Processes Memory Test; GDS: Geriatric Depression Scale; sec: seconds; SD: standard deviation; M: male; F: female; ^aindependent sample t-test; ^bchi-square.