Table 2

Caudate and hippocampal volumes (mm3 (SD)) in cases with low IQ (<84) and higher IQ (>84)

Low IQ (<84) (n=30)Higher IQ (>84) (n=56)p value
Right caudate3493 (758)3816 (609)0.03
Left caudate3480 (758)3671 (617)0.22
Caudate ratio99.8 (10.5)96.6 (10.4)0.23
Right hippocampus2524 (425)2590 (480)0.53
Left hippocampus2322 (369)2515 (429)0.04
Hippocampal ratio92.697.80.02