Table 2.

Iowa patient group characteristics

Group (lesion location)	n	Age at onset	Sex (% male)	Education (years)	FSIQ
vmPFC	13	49.0 (13.3)	54	13.1 (2.4)	105.4 (15.4)
Nonfrontal	238	48.2 (14.2)	46	12.9 (2.9)	99.3 (13.7)

For ″Age at onset,″ ″Education,″ and ″FSIQ,″ mean values are given with standard deviations in parentheses. ″Age at onset″ refers to years at the time of lesion onset. ″Sex (% male)″ is the percentage of male subjects. ″FSIQ″ refers to WAIS-III Full Scale IQ, a measure of postlesion cognitive function. FSIQ is based on available data from 119 patients in the nonfrontal group and 11 patients in the vmPFC group. Groups did not significantly differ with respect to any of the variables.