Table 1.

Characterization of participants

	Complete group (n = 367)	Stereology subgroup (n = 93)
Age [years]	63.7 ± 6.7 (50–81)	64.7 ± 6.9 (50–79)
Gender	53.1% female	51.0% female
BDI score	5.2 ± 4.0 (0–17)	5.5 ± 4.3 (1–17)
Performance on neuropsychological tests
Digit span forward [digits]	7.6 ± 1.6 (3–12)	7.7 ± 1.6 (4–12)
Digit span backward [digits]	6.7 ± 1.7 (2–12)	6.7 ± 1.8 (2–11)
TMT part A [s]	33 ± 10 (14–76)	33 ± 10 (14–68)
TMT part B [s]	83 ± 30 (30–260)	82 ± 27 (30–165)
Stroop test part II [s]	20 ± 4 (10–35)	20 ± 3 (15–29)
Stroop test part III [s]	40 ± 10 (20–76)	39 ± 8 (23–65)

Data are given as mean ± SD (range) of the raw values. Mean values in the subgroup were not significantly different from the total group.