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EVALUATING THE RELATIONSHIP BETWEEN VIGOROUS PHYSICAL ACTIVITY AND HEALTH RELATED QUALITY OF LIFE AMONG OVERWEIGHT AND OBESE CHILDREN: AN APPLICATION OF DYNAMIC P-TECHNIQUE
Borner, Kelsey
Borner, Kelsey
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Abstract
Pediatric overweight and obesity remain a public health concern, and the majority of children do not meet recommended guidelines for physical activity, increasing their risk for impaired health-related quality of life (HRQOL). Current investigations of the relationship between HRQOL and vigorous physical activity (VPA) are limited by a reliance on correlational and two-time point investigations; as such, intra-individual change processes are unknown in this population. The current study utilized a small-N design to capture the dynamic interactions between daily VPA and HRQOL among four adolescents seeking outpatient treatment for pediatric overweight/obesity. Participant physical activity levels were assessed by accelerometer (ActiGraph model GT3X), and HRQOL ratings were collected via iPod Touch. Intra-individual variability was captured utilizing Dynamic P-Technique, a structural equation modeling technique applied at the individual level. Confirmatory Factor Analyses were completed for each participant. Correlational and dynamic relations between daily HRQOL and VPA were assessed with tests of within-lag covariance and cross-lagged relationships; changes in individual constructs over time were assessed with tests of auto-regressive relationships. All four participants evidenced tremendous variability in HRQOL measurement across duration of the intervention. Only two factors of HRQOL held factor structure across time (i.e., Positive Social Attributes and Emotional HRQOL). Several limitations of HRQOL are discussed to explain the relatively poor performance of HRQOL. Significant auto-regressive relationships for HRQOL were found for two participants, and significant within-lag covariance between VPA and Positive Attributes HRQOL was found for one participant. The highly individual nature of the results supports the importance of investigating intra-individual change over time.
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Date
2013-12-31
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University of Kansas
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Keywords
Clinical psychology, Dynamic p technique, Health related quality of life, Intraindividual change, Pediatric obesity, Physical activity