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Development of a Brief Self-Report Measure of Work-Related Cognitive Limitations in Breast Cancer Survivors

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Technical Report

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Uniformed Services University Of The Health Sciences Bethesda United States

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Objective To develop a brief, reliable self-report measure of work-related cognitive limitations using a cross-validation method and to assess the correlation of that measure with an established self-report measure of generic cognitive limitations in cancer survivors. Method A pooled dataset of working e.g., managerial, sales, services, professionaltechnical, clerical breast cancer survivors n 228 completed a self-report measure of work-related cognitive limitations, the Cognitive Symptom Checklist-Work-59 CSC-W59. A cross validation technique was employed such that the pooled participants were randomized into two separate groups in order to conduct exploratory factor analysis EFA of the CSC-W59 with one group and validate the results of the EFA with the other group. A subset of this pooled dataset breast cancer survivors, n 133 also completed a self-report measure of generic cognitive limitations, the Functional Assessment of Cancer Therapy-Cognition FACT-Cog which measures such dimensions as subjectively perceived cognitive impairment, others perception of cognitive impairment, and effects of cognitive impairment on quality of functioning. Results The EFA of the 59 items in the CSC-W59 on randomized group 1 n 114 resulted in the identification of 21 items with a consistent factor loading of .4 or higher on three separate subscales Memory, Executive Function, and Task Completion. The consistency of the factor structure on these 21 items was validated on randomized group 2 n 114 which demonstrated the same 21 items loading at .4 or higher on the same three subscales. These findings resulted in a brief 21-item, self-report measure referred to as the Cognitive Symptom Checklist-Work-21CSC-W21. The CSC-W21 demonstrates good internal reliability .88 and accounts for 68 of the variance in a measure of generic cognitive function .001 suggesting the CSCW21captures some commonalities of limitations in global cognition.

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