Table 1.
Linear regressions using amygdala and hippocampal volumes (corrected for total intracranial volume) as independent variables and social network characteristics as dependent variables for the whole group as well as the young, older, male, and female subgroups.
| Amygdala | Hippocampus | |||
|---|---|---|---|---|
| Left | Right | Left | Right | |
| Whole group (n = 58) | ||||
| Social Network Size | 0.38, 2.84 (0.006) | 0.29, 2.15 (0.036) | 0.23, 1.66 (0.103) | 0.10, 0.72 (0.472) |
| Social Network Complexity | 0.39, 3.13 (0.003) | 0.30, 2.32 (0.024) | 0.25, 1.89 (0.064) | 0.15, 1.08 (0.286) |
| Young group (n = 19) | ||||
| Social Network Size | 0.58, 2.96 (0.009) | 0.54, 2.61 (0.018) | 0.22, 0.94 (0.359) | −0.07, −0.27 (0.792) |
| Social Network Complexity | 0.56, 2.81 (0.012) | 0.57, 2.85 (0.011) | 0.22, 0.94 (0.360) | −0.11, −0.45 (0.656) |
| Older group (n = 35) | ||||
| Social Network Size | 0.32, 2.05 (0.048) | 0.24, 1.52 (0.138) | 0.27, 1.68 (0.102) | 0.18, 1.11 (0.274) |
| Social Network Complexity | 0.38, 2.50 (0.017) | 0.28, 1.76 (0.086) | 0.32, 2.06 (0.047) | 0.27, 1.69 (0.099) |
| Males (n = 36) | ||||
| Social Network Size | 0.31, 1.87 (0.07) | 0.18, 1.06 (0.298) | 0.19, 1.15 (0.259) | 0.07, 0.38 (0.706) |
| Social Network Complexity | 0.43, 2.79 (0.009) | 0.27, 1.60 (0.118) | 0.35, 2.19 (0.036) | 0.22, 1.23 (0.203) |
| Females (n = 22) | ||||
| Social Network Size | 0.52, 2.72 (0.013) | 0.62, 3.53 (0.002) | 0.20, 0.92 (0.367) | 0.22, 1.00 (0.329) |
| Social Network Complexity | 0.45, 2.27 (0.034) | 0.60, 3.39 (0.003) | 0.14, 0.64 (0.529) | 0.20, 0.91 (0.372) |
For the whole–group analysis, we controlled for age. The table displays standardized regression coefficients (B), t values, and p values (2 tailed, in parentheses).