1. Psychometric Properties of the Dance Functional Outcome Survey (DFOS): Reliability, Validity, and Responsiveness.
- Author
-
BRONNER, SHAW, CHODOCK, EVIE, REIS URBANO, IGOR EDWARDO, and SMITH, TERESA
- Subjects
LEG physiology ,BACK physiology ,ANALYSIS of variance ,CONFIDENCE intervals ,STATISTICAL correlation ,DANCE ,ENTERTAINERS ,FACTOR analysis ,HEALTH surveys ,LIFE skills ,LONGITUDINAL method ,RESEARCH methodology ,PAIRED comparisons (Mathematics) ,PSYCHOMETRICS ,QUESTIONNAIRES ,RESEARCH ,RESEARCH evaluation ,RESEARCH funding ,SURVEYS ,T-test (Statistics) ,ACTIVITIES of daily living ,STATISTICAL reliability ,EFFECT sizes (Statistics) ,STRUCTURAL equation modeling ,MULTITRAIT multimethod techniques ,REPEATED measures design ,RECEIVER operating characteristic curves ,RESEARCH methodology evaluation ,DATA analysis software ,DESCRIPTIVE statistics ,INTRACLASS correlation - Abstract
* BACKGROUND: There are no outcomes measures that focus on the unique functional requirements of dancers. * OBJECTIVES: To evaluate test-retest reliability, internal consistency, construct validity, sensitivity, and responsiveness of the Dance Functional Outcome Survey (DFOS) in professional and preprofessional adult dancers. * METHODS: This prospective cohort study examined test-retest reliability of the DFOS in 198 healthy and injured dancers over 2 weeks, using intraclass correlation coefficients (ICC
2,1 ). In a sample of 725 healthy and injured dancers, the following were examined: (1) construct validity, by comparing the DFOS to the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) using Pearson correlations; (2) exploratory factor analysis and internal consistency; and (3) sensitivity, by generating receiver operating characteristic curves and determining area under the curve (AUC). In a subgroup of 47 injured dancers, we determined internal responsiveness across 4 time points using repeated-measures analysis of variance (P<.05). Injured dancers' scores were analyzed for floor and ceiling effects. * RESULTS: The DFOS demonstrated high test-retest reliability (ICC≥0.93). Single-factor loading in exploratory factor analysis supported unidimensionality of the scale, with high internal consistency (α = .96). The DFOS total score and activities-of-daily-living (ADL) and dance technique subscores had strong construct validity compared with scores on the SF-36 physical component summary (r≥0.77). This study found excellent sensitivity, with high AUC values (AUC≥0.91). There were significant differences across time for DFOS scores (P<.001), demonstrating responsiveness to change. There were no floor or ceiling effects. * CONCLUSION: The DFOS demonstrates acceptable psychometric performance as an outcome and screening measure for dancers. The DFOS is a useful tool to monitor both healthy state and functional limitation following lower extremity or low back injury in adult ballet and modern dancers. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF