Psychometric Testing of the Control Attitudes Scale-Revised for Patients With a Left Ventricular Assist Device.
Jessica Harman Thompson, Debra Moser, Christopher S Lee
PMID 35324510WHAT IT FOUND
In 130 LVAD patients, the CAS-R identified lower perceived control well.
Patients with lower scores reported more anxiety, depression, and worse quality of life. The scale was less accurate for high scorers.
Key findings
01The CAS-R showed good internal consistency in the LVAD sample.
02Better perceived control was associated with fewer depressive symptoms and fewer anxiety symptoms.
03The CAS-R was more accurate for lower scorers than for higher scorers.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The sample was small, although the authors say it is substantial for LVAD research. This was a secondary analysis, so some validity tests were not available. The analysis combined two cohorts collected in different ways, which may affect the results. The scale was less accurate for higher scorers, so it may not separate patients with high perceived control well. The study tested questionnaire properties and associations, not whether a perceived-control intervention improves outcomes.
The easy way to misread this
Do not use this paper to conclude that a perceived-control intervention improves outcomes for LVAD patients. The study tested a questionnaire, not a treatment. Do not rely on the CAS-R to precisely rank patients with high perceived control, because the scale was less accurate for higher scorers.