Table 2.
Bivariate and partial correlations between memory scores, between left and right hippocampal volume, and between memory score and left or right hippocampal volume. Rr = recency ratio; Tr = total ratio; LMT = logical memory test; HV = hippocampal volume; TIV = total intracranial volume
| Rra | Tra | Immediate LMTa | Delayed LMTa | Left HV by TIVb | Right HV by TIVb c | |
|---|---|---|---|---|---|---|
| Rr | 1 | 0.503** | −0.162* | −0.310** | −0.270** | −0.186** |
| Tr | 1 | −0.290** | −0.572** | −0.297** | −0.215** | |
| Immediate LMT | 1 | 0.929** | 0.168* | 0.156* | ||
| Delayed LMT | 1 | 0.251** | 0.208** | |||
| Left HV | 1 | 0.733** | ||||
| Right HV | 1 |
Note: N = 355.
Bivariate Spearman’s rank-order correlations between Rr, Tr, Immediate LMT and Delayed LMT.
Partial correlations, controlling for age, gender, sample, elapsed time between MRI scan and neuropsychological assessment, years of education and APOE risk score, between memory scores and left or right HV.
Bivariate Spearman’s rank-order correlations between left and right HV corrected for TIV.
p < .05;
p < .01;
p < .001. Bold: indicates the stronger partial coefficients in the column, when comparing the strength of the associations between each memory score and left or right HV, as per Steiger’s Z-test.