Table 1.

Demographics and other participant information

	M ± SD	Range
Age	60.7 ± 5.8	47.8 – 71.3
Insulin (μU/mL)	2.0 ± 7.0	2 – 48
Glucose (mg/dL)	94.6 ± 10.0	74 – 132
HOMA-IR	2.2 ±1.9	0.5 – 14.1
BMI	28.2 ± 5.3	18.5 – 47.3
Speed & Flexibility	0.1 ± 0.9	−2.2 – 2.4
Working Memory	0.2 ± 1.1	−2.4 – 3.2
Verbal Learning	0.2 ± 1.0	−2.5 – 1.8
Immediate Memory	0.2 ± 1.1	−2.5 – 2.9
	n (%)
Women	108 (72.0%)
Family History	103 (68.7%)
APOE ε 4 Genotype	61 (40.7%)
Type 2 Diabetes	7 (4.7%)

APOE-ε4 = Apolipoprotein E ε4 genotype; BMI = Body Mass Index; HOMA-IR = Homeostatic Model Assessment of Insulin Resistance. The individual tests which loaded onto the identified factors were as follows: Rey Auditory Verbal Learning Test⁶⁶ Trials 1 and 2 loaded onto Immediate Memory; Rey Auditory Verbal Learning Test⁶⁶ Trials 3–5 and Delayed Recall Trial loaded onto Verbal Learning & Memory; Wechsler Adult Intelligence Scale – 3rd edition⁶⁷, Digit Span forward and backward, and Letter-Numbering Sequencing subtests loaded onto Working Memory; and the interference trial from the Stroop Test⁶⁸, and Trail Making Test A and B⁶⁹ loaded onto Speed & Flexibility.