Table 3.
Frequency scores, group means (SD) for demographic and hippocampal volume data.
| Controls (N = 26) | CH (N = 25)a | HYPO (N = 17)b | p-Valuec | |
|---|---|---|---|---|
| Learning disability | 0 | 2 | 0 | .176 |
| Diagnosis of ADHD | 0 | 2 | 1 | .370 |
| Sex (number of males) | 9 | 11 | 11 | .155 |
| Socioeconomic status | 52.35 (10.44) | 48.12 (9.68) | 50.29 (10.41) | .338 |
| Age | 10.46 (.95) | 11.36 (1.41) | 10.12 (.49) | .001 |
| WASI IQ score | 118.04 (10.85) | 104.12 (8.89) | 112.94 (12.12) | <.001 |
| Retention interval (in years) | 4.04 (2.05) | 4.90 (2.24) | 5.00 (2.93) | .314 |
| Intracranial volume (mm3)d | 1720.03 (146.80) | 1688.50 (159.64) | 1748.06 (188.30) | .700 |
| Total hippocampus (mm3)e | 3841.42 (454.46) | 3829.81 (471.32) | 3560.97 (508.78) | .154 |
| Right hippocampus (mm3)e | 1961.92 (247.85) | 1947.64 (253.77) | 1829.90 (267.53) | .245 |
| Right posterior (mm3)e | 1038.45 (151.52) | 1029.05 (119.26) | 953.82 (187.19) | .238 |
| Right anterior (mm3)e | 923.49 (135.60) | 918.60 (215.72) | 876.08 (165.37) | .684 |
| Left hippocampus (mm3)e | 1879.50 (223.31) | 1882.16 (229.75) | 1731.08 (246.97) | .086 |
| Left posterior (mm3)e | 1022.91 (135.60) | 1025.95 (119.75) | 965.49 (160.36) | .395 |
| Left anterior (mm3)e | 856.23 (169.26) | 857.03 (231.69) | 775.11 (167.55) | .332 |
a
3 CH did not complete MRI scan.
b
1 HYPO did not complete MRI scan.
c
After controlling for appropriate covariates.
d
Expressed per 1000 mm3.
e
Note: hippocampal volumes reflect group means after controlling for age, sex, and ICV.