Abstract
BackgroundPatient-centered care and evidence-based practice (EBP) are core competencies for health care professionals. The importance of EBP has led to an increase in research involving clinical outcomes; current recommendations emphasize collecting patient focused measures, thus increasing the need for psychometrically sound patient reported outcome measures (PROMs) of health. Disablement has been identified as a valuable multi-dimensional construct for patient care. The Disablement in the Physically Active Scale Short Form-8 (DPA SF-8) has been proposed as a tool to be used in the physically active population that assesses a physical summary component of health and a quality of life component however, further analysis is necessary to ensure the instrument is psychometrically sound.MethodsConfirmatory factor analyses (CFAs) were conducted on the DPA SF-8 at each time point to ensure factor structure. Reliability of the scale and internal consistency of the subscales were assessed, and a minimal detectable change (MDC) calculated. Additionally, a minimal clinically important difference (MCID) was also established, and invariance testing across three time points and groups was conducted.ResultsThe CFAs at all three visits exceeded recommended model fit indices. The interclass correlation coefficient value (.924) calculated indicated excellent scale reliability and Cronbach’s alpha for subscales PHY and QOL were within recommend values. The MDC value calculated was 5.83 and the MCID for persistent injuries were 2 points and for acute injuries, 3 points. The DPA SF-8 was invariant across time and across subgroups.ConclusionsThe DPA SF-8 met CFA recommendations and criteria for multi-group and longitudinal invariance testing, which indicates the scale may be used to assess for differences between the groups or across time. Our overall analysis indicates the DPA SF-8 is a valid, reliable, and responsive instrument to assess patient improvement in the physically active population.
Highlights
Patient-centered care and evidence-based practice (EBP) are core competencies for health care professionals
Selecting an appropriate disablement Patient reported outcome measure (PROM) requires consideration of the underlying theoretical model, as well as reflection on the population of interest because researchers have modified or created disablement PROMs to be used in specific subgroups of patients and not all are designed for measuring the relevant constructs associated with musculoskeletal injury suffered during sport or exercise [10]
Five individuals reported scores that were identified as univariate outliers and 22 reported scores that were identified as multivariate outliers; the 27 individuals were subsequently removed from the dataset
Summary
Patient-centered care and evidence-based practice (EBP) are core competencies for health care professionals. The importance of EBP has led to an increase in research involving clinical outcomes; current recommendations emphasize collecting patient focused measures, increasing the need for psychometrically sound patient reported outcome measures (PROMs) of health. Health care professionals have an ethical obligation to uphold core competencies, which includes providing patient-centered care and employing evidence-based practice (EBP) [1, 2]. Selecting an appropriate disablement PROM requires consideration of the underlying theoretical model, as well as reflection on the population of interest because researchers have modified or created disablement PROMs to be used in specific subgroups of patients (e.g., physically active patients) and not all are designed for measuring the relevant constructs associated with musculoskeletal injury suffered during sport or exercise [10]
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