期刊
SCHIZOPHRENIA BULLETIN
卷 37, 期 3, 页码 538-545出版社
OXFORD UNIV PRESS
DOI: 10.1093/schbul/sbp095
关键词
schizophrenia; cognition; cognitive assessment; neurocognitive battery; clinical assessment
类别
资金
- National Alliance for Research on Schizophrenia and Depression [20062767]
Cognitive impairment in schizophrenia is often severe, enduring, and contributes significantly to chronic disability. But clinicians have difficulty in assessing cognition due to a lack of brief instruments. We evaluated whether a brief battery of cognitive tests derived from larger batteries could generate a summary score representing global cognitive function. Using data from 3 previously published trials, we calculated the corrected item-total correlations (CITCs) or the correlation of each test with the battery total score. We computed the proportion of variance that each test shares with the global score excluding that test (Rt2=CITC2) and the variance explained per minute of administration time for each test (Rt2/min). The 3 tests with the highest Rt2/min were selected for the brief battery. The composite score from the trail making test B, category fluency, and digit symbol correlated .86 with the global score of the larger battery in 2 of the studies and correlated between .73 and .82 with the total battery scores excluding these 3 tests. A Brief Cognitive Assessment Tool for Schizophrenia (B-CATS) using the above 3 tests can be administered in 10-11 min. The full batteries of the larger studies have administration times ranging from 90 to 210 min. Given prior research suggesting that a single factor of global cognition best explains the pattern of cognitive deficit in schizophrenia, an instrument like B-CATS can provide clinicians with meaningful data regarding their patients' cognitive function. It can also serve researchers who want an estimate of global cognitive function without requiring a full neuropsychological battery.
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