Corpus callosum signal intensity
| Subregion | Healthy controls (n = 36) | Bipolar patients (n = 29) | Unipolar patients (n = 23) |
|---|---|---|---|
| Values are mean (SD). Units are arbitrary. All MRI signal intensity measures for corpus callosum subregions were corrected for the MRI signal intensity of the vitreous humour. | |||
| *MRI signal intensity was significantly reduced in bipolar patients compared with healthy controls (analysis of covariance (ANCOVA), age and sex as covariates; p⩽0.01). No significant differences were found between unipolar patients and healthy controls (ANCOVA, age and sex as covariates; p>0.05). | |||
| Genu | 1.49 (0.37) | 1.29 (0.26)* | 1.53 (0.40) |
| Anterior body | 1.46 (0.35) | 1.27 (0.24)* | 1.48 (0.34) |
| Posterior body | 1.44 (0.33) | 1.26 (0.23)* | 1.45 (0.31) |
| Isthmus | 1.45 (0.34) | 1.26 (0.24)* | 1.51 (0.35) |
| Splenium | 1.47 (0.36) | 1.28 (0.26)* | 1.50 (0.36) |