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Construct validity and reliability of the participation scale (P-scale) in individuals with spinal cord injury.
Journal of Spinal Cord Medicine 2023 March 14
OBJECTIVES: To investigate the reliability and the construct validity of the Participation Scale (P-scale) in adults with Spinal Cord Injury (SCI).
DESIGN: A cross-sectional study.
SETTING: : SARAH Network of Rehabilitation Hospitals, Brazil.
PARTICIPANTS: : One hundred individuals with SCI.
INTERVENTIONS: : Not applicable.
OUTCOME MEASURES: : Sociodemographic and clinical characteristics were investigated. To assess reliability the P-scale was applied twice with a one-week interval. To assess construct validity the Functional Independence Measure, the Beck Depression Inventory, and the Accessibility Perception Questionnaire were administered.
RESULTS: The mean age of the participants was 38.9 ± 12.80 years. The majority were male (70%) and had traumatic injuries (74%). The P-scale showed significant correlations with the Functional Independence Measure motor domain ( rs = -0.280) and cognitive domain ( rs = -0.520); with the Beck Depression Inventory score ( rs = 0.610); with the Accessibility Perception Questionnaire displacement domain ( rs = -0.620) and psycho-affective domain ( rs = 0.530). Mean scores obtained on the P-scale differed significantly between the groups with and without depressive symptoms ( P = 0.001), neuropathic pain ( P = 0.033), and functional dependence ( P = 0.001). There was no difference between the paraplegic and quadriplegic groups. The P-scale had adequate internal consistency (Cronbach's alpha = 0.873), excellent test-retest reliability (ICC2,1 = 0.992; 95% CI = 0.987-0.994), and in the Bland-Altman plot analysis, only six values fell outside the limits of agreement.
CONCLUSION: Our results support the use of the P-scale to assess the participation of individuals with SCI in research and clinical practice.
DESIGN: A cross-sectional study.
SETTING: : SARAH Network of Rehabilitation Hospitals, Brazil.
PARTICIPANTS: : One hundred individuals with SCI.
INTERVENTIONS: : Not applicable.
OUTCOME MEASURES: : Sociodemographic and clinical characteristics were investigated. To assess reliability the P-scale was applied twice with a one-week interval. To assess construct validity the Functional Independence Measure, the Beck Depression Inventory, and the Accessibility Perception Questionnaire were administered.
RESULTS: The mean age of the participants was 38.9 ± 12.80 years. The majority were male (70%) and had traumatic injuries (74%). The P-scale showed significant correlations with the Functional Independence Measure motor domain ( rs = -0.280) and cognitive domain ( rs = -0.520); with the Beck Depression Inventory score ( rs = 0.610); with the Accessibility Perception Questionnaire displacement domain ( rs = -0.620) and psycho-affective domain ( rs = 0.530). Mean scores obtained on the P-scale differed significantly between the groups with and without depressive symptoms ( P = 0.001), neuropathic pain ( P = 0.033), and functional dependence ( P = 0.001). There was no difference between the paraplegic and quadriplegic groups. The P-scale had adequate internal consistency (Cronbach's alpha = 0.873), excellent test-retest reliability (ICC2,1 = 0.992; 95% CI = 0.987-0.994), and in the Bland-Altman plot analysis, only six values fell outside the limits of agreement.
CONCLUSION: Our results support the use of the P-scale to assess the participation of individuals with SCI in research and clinical practice.
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