Table 1.
Demographics and sample characteristics.
| Dataset | Cross-sectional | Longitudinal | Eyes closed/open |
|---|---|---|---|
| Number of subjects | 121 | 44 | 20 |
| Age in years, mean (s.d.) | 69.3 (3.6) | 72.9 (7.6) | 42.8 (6.4) |
| Sex (Female/Male) | 73/48 | 25/19 | 9/11 |
| Handedness (L/A/R) | 0/0/121 | 6/0/38 | 0/0/20 |
| Education in years, mean (s.d.) | 17.6 (2.0) | 17.5 (1.9) | 14.4 (2.6) |
| IRI-EC, mean (s.d.) | 27.4 (4.8) | NA | NA |
| IRI-PT, mean (s.d.) | 24.3 (5.7) | NA | NA |
| IRI-PD, mean (s.d.) | 13.1 (5.0) | NA | NA |
| IRI-FS, mean (s.d.) | 18.3 (5.1) | NA | NA |
| Interval between scanning dates in months, mean (s.d.) | NA | 9.2 (2.7) | 1.0 (0.2) |
A = ambidextrous; EC = empathic concern; FS = fantasy score; IRI = Interpersonal Reactivity Index; L = left; NA = not applicable; PD = personal distress; PT = perspective taking; R = right; s.d. = standard deviation.