Category: Measurement; Stroke
To establish content validity for the Stages of Actual Upper Extremity Use (SAUU) scale.
Background: The SAUU is a novel assessment to classify stage of readiness for actual use of the upper extremity for individuals after chronic stroke. Actual use is defined as spontaneous use of the affected upper extremity in real-world environments. The SAUU is based on the Transtheoretical Model of Behavior Change (Prochaska, Redding, & Evers, 2015), and classifies an individual into one of five stages of health behaviour change specific for actual use. Classification of individuals into stages of change is a crucial first step because response to treatment is a function of the stage that someone is in.
Design : Online survey
Setting : General community
Participants (or Animals, Specimens, Cadavers) : Six experts in stroke rehabilitation
Interventions : NA
Main Outcome Measure(s) :
Calculation of item content validity index (I-CVI) and scale content validity index (S-CVI) (Lynn, 1986).
Results : Six participants, on average, had 21.2 years of experience working with individuals with stroke and consisted of occupational and physical therapists. Five worked primarily in academic settings, while one participant worked in a clinical setting. SAUU contains nine study questions. I-CVI scores for the nine items ranged from .50 to 1. Using guidelines outlined in Polit & Beck (2006), a cut off threshold of .78 was applied to SAUU items, resulting in the removal of the bed mobility item. Overall S-CVI was calculated by determining the average of all remaining I-CVI scores resulting in S-CVI= .94. The cut off threshold for S-CVI is recommended at .80-.90 (Polit & Beck 2006).
Overall content validity for the SAUU scale was established. The next steps will be to continue tool refinement by collecting feedback from stroke survivors utilizing cognitive interviewing approaches to assess for structural problems, and to establish construct validity and reliability of the SAUU in a cross-sectional study in individuals with chronic stroke.