Invariance Testing of the Disablement in the Physically Active Scale Short Form-10.

Psychometrically sound instruments are needed to accurately track the effectiveness of treatment and assess the quality of patient care. The Disablement in the Physically Active (DPA) scale Short Form-10 (SF-10) was developed as a more parsimonious version of the Disablement in the Physically Active scale to assess disablement in the physically active. Psychometric assessment of the DPA SF-10 has not been completed; specifically, the scale properties must be assessed among a sample of individuals who respond only to the 10-item scale at multiple time points. To assess the psychometric properties of the DPA SF-10 using confirmatory factor analysis and invariance procedures across multiple time points. Confirmatory factor analyses and longitudinal invariance tests were conducted. The DPA SF-10 met contemporary fit index recommendations and demonstrated longitudinal invariance; however, localized fit concerns suggest further modification is needed. Adoption of the DPA SF-10 into widespread clinical practice and research is not recommended until further psychometric testing and scale modification are performed.

Casanova MP ，Baker RT ，Pickering MA ，Baker JG ... -  《-》

Confirmatory Factor Analysis of the Disablement in the Physically Active Scale and Preliminary Testing of Short-Form Versions: A Calibration and Validation Study.

Baker RT ，Burton D ，Pickering MA ，Start A ... -  《-》

Exploring the Psychometric Properties of the Disablement in the Physically Active Scale Short Form-8 in Adolescents.

Holman M ，Casanova MP ，Baker RT 《-》

Invariance Testing of the Disablement in the Physically Active Scale.

The increased emphasis on implementing evidence-based practice has reinforced the need to more accurately assess patient improvement. Psychometrically sound, patient-reported outcome measures are essential for evaluating patient care. A patient-reported outcome instrument that may be useful for clinicians is the Disablement in the Physically Active Scale (DPAS). Before adopting this scale, however, researchers must evaluate its psychometric properties, particularly across subpopulations. To evaluate the psychometric properties of the DPAS in a large sample using confirmatory factor analysis procedures and assess structural invariance of the scale across sex, age, injury status, and athletic status groups. Observational study. Twenty-two clinical sites. Of 1445 physically active individuals recruited from multiple athletic training clinical sites, data from 1276 were included in the analysis. Respondents were either healthy or experiencing an acute, subacute, or persistent musculoskeletal injury. A confirmatory factor analysis was performed on the full sample, and multigroup invariance testing was conducted to assess differences across sex, age, injury status, and athletic status. Given the poor model fit, alternate model generation was used to identify a more parsimonious factor structure. The DPAS did not meet contemporary fit index recommendations or the criteria to demonstrate structural invariance. We identified an 8-item model that met the model fit recommendations using alternate model generation. The 16-item DPAS did not meet the model fit recommendations and may not be the most parsimonious or reliable measure for assessing disablement and quality of life. Use of the 16-item DPAS across subpopulations of interest is not recommended. More examination involving a true cross-validation sample should be completed on the 8-item DPAS before this scale is adopted in research and practice.

Baker RT ，Casanova MP ，Pickering MA ，Baker JG ... -  《-》

Disablement in the Physically Active Scale Short Form-8: psychometric evaluation.

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, 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. Confirmatory 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. The 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. The 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.

Casanova MP ，Nelson MC ，Pickering MA ，Larkins LW ，Appleby KM ，Grindley EJ ，Baker RT ... -  《BMC Sports Science Medicine and Rehabilitation》