Rasch analysis of the University of Washington Self-Efficacy Scale short-form (UW-SES-6) in people with long-standing spinal cord injury

Exploratory examination of the scale structure of the Moorong Self-Efficacy Scale: Application of Rasch Measurement Theory

OBJECTIVE

Exploratory application of the Rasch Measurement (RM) Model for evidence for reproducibility, conceptual/content validity, and structural validity of the Moorong Self-Efficacy Scale (MSES).

STUDY DESIGN

Secondary RM analysis of data collected in a randomized controlled trial comparing two exercise interventions for persons living with spinal cord injury (SCI).

SETTING

Community-dwelling persons living with SCI enrolled in an exercise study.

PARTICIPANTS

Adults (n = 79) enrolled in the parent study had a traumatic SCI > 3 months prior, injury level C5 to T12.

INTERVENTIONS

Not applicable.

OUTCOME MEASURE

The original MSES is a 16-item measure of self-efficacy with a 7-level response scale for un/certainty which was developed for use with persons living with SCI.

RESULTS

We addressed item misfit, infrequent category endorsement, and category step disorder by removing two items and reorganizing the rating scale. Rating scale changes removed category 4 (Neutral), combined categories 1-3 (Very Uncertain, Somewhat Uncertain, and Uncertain) for all items, and further combined certainty categories for two items. Principal components analysis of the residuals indicated a possible second dimension with a first-contrast Eigenvalue of 2.4. However, the contrasted item groups had explained variance <10% and a dis-attenuated correlation = 0.92 indicating they measure the same underlying trait. The small sample size precluded examination of differential item functioning.

CONCLUSIONS

Exploratory RM analysis of MSES produced a 14-item Rasch version which identified structural and content validity evidence concerns inherent in the original MSES. However, results could be biased by a small sample size and further study should examine the item content and rating scale structure with larger, more diverse samples of persons living with SCI.

Psychological screening of significant others during spinal cord injury rehabilitation

DESIGN

Retrospective cohort study.

OBJECTIVE

Determine the course of burden and psychological distress of significant others (SOs) during initial spinal cord injury (SCI) rehabilitation and to predict the caregiver's burden at discharge with characteristics of SOs and persons with SCI (PSCIs) at the start of rehabilitation.

SETTING

Rehabilitation center Sint Maartenskliniek, Nijmegen, The Netherlands.

METHODS

All PSCIs admitted for initial rehabilitation between October 2020 and December 2022 were included. One of their SOs were asked to complete a set of screening questionnaires, collected in our routine context of care.

RESULTS

A total of 181 PSCIs (62% male, average age 60 years, 80% incomplete SCI, 60% paraplegia and 32 days after injury) and 158 SOs (40% male, average age 57 years) were screened at admission, and 145 and 93 at discharge, respectively. For SOs, the average caregiver's burden and feelings of depression and anxiety did not change during admission. The caregiver's burden score at discharge was best predicted by the burden score at admission, explaining 20% (P < 0.001) of the variance. An additional 13% (P = 0.02) of the variance was explained by other SO and PSCI variables gathered in this study.

CONCLUSION

The caregiver's burden in this group of SOs during rehabilitation, was higher than that of a representative group in the chronic phase. On both assessments, around 20% scored above the cutoff. Scores of psychological distress are comparable to former studies. Standard screening of SOs during initial SCI rehabilitation is important to help the interdisciplinary team identify SOs at risk, and target their treatment during inpatient rehabilitation.

Trajectories of Self-Efficacy, Depressed Mood, and Anxiety From Admission to Spinal Cord Injury Rehabilitation to 1 Year After Discharge

OBJECTIVE

Self-efficacy (SE) is an important determinant for the psychological adjustment of people with spinal cord injury (SCI). However, little is known about the course of SE during inpatient rehabilitation up to 1 year after discharge. The aim of this study was to determine latent trajectory classes of SE, depressive mood, and anxiety in people with SCI, as well as the interrelationships between these trajectories.

DESIGN

Longitudinal inception cohort study.

SETTING

Eight specialized SCI rehabilitation centers.

PARTICIPANTS

The participants (N=268) were mainly men 183 of 268 (68.3%) with a mean age of 55.6 years. Almost half had a traumatic SCI 135 of 268 (50.4%) and tetraplegia (53.7%), and the minority had a motor complete SCI (32.2%).

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

SE was measured using the University of Washington Self-Efficacy Scale. In addition, the Hospital Anxiety and Depression Scale was used to asses distress and perform dual trajectory modeling analyses.

RESULTS

Three trajectories of SE, indicating low, middle, and high SE, could be distinguished. Furthermore, a 2-class trajectory solution for depressive mood and a 4-class solution for anxiety were found to be most suitable. All trajectories were stable over time. Developmental connections between SE and depressive mood and between SE and anxiety were revealed. In particular, participants who adjusted well, reporting low scores on depressive mood and anxiety, could be identified by their high SE scores. However, the group of participants with high depressive mood scores and anxiety scores could not always be identified based on their SE trajectory.

CONCLUSIONS

In accordance with our hypotheses, distinct trajectories of SE, depressive mood, and anxiety were identified and high probabilities that SE trajectories were interrelated to the trajectories from depressive mood and anxiety were confirmed. Concurrent screening for SE and distress might best detect people at risk for adjustment problems.

Enhancing our conceptual understanding of state and trait self-efficacy by correlational analysis of four self-efficacy scales in people with spinal cord injury

Background

Self-efficacy is an important determinant of adjustment following spinal cord injury. Self-efficacy is defined as the belief that one can successfully execute behavior required to produce the desired outcomes. In its original conceptualization, self-efficacy refers to the confidence that people have in their ability to accomplish specific tasks and behaviors within a specific context. Over the years these situation specific aspects have been unconfined and multiple constructs of self-efficacy have been proposed. The most common is a division in trait and state self-efficacy. Another used division that is utilized is between general, domain-specific and task-specific self-efficacy. The scientific support for these constructs is to date still unclear. The objective of this study was to enhance the understanding of the self-efficacy construct by comparing four self-efficacy scales designed to measure three aspects of self-efficacy (general versus domain-specific versus task-specific) in people with spinal cord injury.

Methods

Dutch and Australian adults with spinal cord injury (N = 140) completed four frequently used self-efficacy scales; the Moorong Self-efficacy Scale, General Self-efficacy Scale, University of Washington Self-efficacy Scale and a Self-care Self-efficacy Scale approximately 6 months after their inpatient rehabilitation. Pearson correlations examined inter-relationships between the scales.

Results

Hypothesized strong correlations between scales measuring similar aspects of self-efficacy were found (correlations 0.50–0.65). However, the hypothesized weak to moderate correlations between scales measuring diverging aspects of self-efficacy were only partly found (correlations 0.31–0.74), with 7 out of 12 correlations being strong instead of moderate.

Conclusions

The expected distinctions between the three aspects of self-efficacy was not demonstrated. All four scales measure a common latent construct, most likely general self-efficacy aspects. Further research is necessary to find ways to improve the measurement of domain-specific and task-specific aspects of SE, so that they are sensitive enough to capture change over time, and thus enhance clinical outcomes of people with SCI as they adjust to their disability.