Dr. Royall et al., EXECUTIVE IMPAIRMENT AMONG THE FUNCTIONALLY DEPENDENT - COMPARISONS BETWEEN SCHIZOPHRENIC AND ELDERLY SUBJECTS, The American journal of psychiatry, 150(12), 1993, pp. 1813-1819
Objective: Executive deficits have traditionally been associated with
frontal lobe brain damage. They are relevant to a variety of disabling
mental conditions, including schizophrenia and Alzheimer's disease. T
o measure these deficits, the authors developed the Executive Intervie
w, a 25-item, 15-minute interview. It has been validated among elderly
subjects across a wide range of functional impairment. Method- Forty
young, chronically ill schizophrenic residents of a state mental healt
h facility and 104 elderly residents, representing three levels of car
e, of a comprehensive retirement community were tested with the Execut
ive Interview and the Mini-Mental State. Results: When age, gender, ed
ucation, and number of prescribed medications were controlled, cogniti
ve impairment on the Executive Interview and Mini-Mental State rose wi
th level of care. The Executive Interview alone discriminated between
subjects at each level of care, and it was more sensitive to cognitive
impairment than the Mini-Mental State. Executive Interview scores cor
related the strongest with level of care. Mini-Mental State scores, nu
mber of prescribed medications, and age also correlated significantly.
Schizophrenic patients showed as much executive impairment on the Exe
cutive Interview as elderly subjects at the same level of care despite
significant differences in age, sex, and neuroleptic use. Executive I
nterview and Mini-Mental State scores were highly correlated among the
elderly but less so among the schizophrenic patients. Cross-group dif
ferences were also found in the pattern of failure on selected Executi
ve Interview items despite similar total Executive Interview scores. C
onclusions: Increasing executive dyscontrol is associated with the nee
d for increasing levels of care and supervision. This finding is neith
er age nor disease specific. Cross-group differences on selected Execu
tive Interview items suggest the existence of disease-specific pattern
s of failure. Their recognition could prove useful in the identificati
on of anatomically or pathophysiologically distinct subgroups among pa
tients with executive dyscontrol.