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The Influence of Body Mass Index on Self-Report and Performance-Based Measures of Physical Function in Adult Women

Locke, Andrea L. (2009) The Influence of Body Mass Index on Self-Report and Performance-Based Measures of Physical Function in Adult Women. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Obesity has a negative impact on physical function; however, little is known about limitations in physical function across BMI categories using both self-report and performance-based measures. Furthermore, the impact of BMI on the measurement of function has not been explored. PURPOSE: To assess physical function in adult women across BMI categories using self-report and performance-based measures and determine the influence of BMI on the relation of self-report and performance-based measures. METHODS: 50 sedentary females (10 in each BMI category: normal weight, overweight, and class 1, 2, and 3 obese) aged 51.2 ± 5.4 years participated. Assessments included demographics, past medical history, physical activity level, BMI, waist circumference, body composition, and self-report and performance-based measures of physical function. Correlation coefficients were computed between BMI and the measures of physical function. Physical function was compared between BMI categories using analysis of variance. The influence of BMI on the relation of self-report and performance-based measures was analyzed by computing correlation coefficients between the measures for the non-obese and obese and by using linear regression. Furthermore, questions from the self-report measure were compared to similar tasks on the performance-based measure for the non-obese and the obese. RESULTS: As BMI increased, physical function decreased on self-report and performance-based measures (all p <.01). Compared to those that were normal weight and overweight, the obese had poorer physical function on both types of measures (all p < .01). A large percentage of participants in the obese groups reported changes in how or how often they performed functional activities. While the performance-based and self-report measures of function were moderately correlated in the sample (p < .001), the association between the measures was significantly stronger for the non-obese compared to the obese. Compared to the non-obese, a greater number of individuals with obesity performed differently on walking tests compared to their report. CONCLUSIONS: High BMI had an adverse effect on common every-day functional tasks in adult women. Compared to those that are normal weight and overweight, individuals with obesity had the greatest impairments in physical function and tended to less accurately depict physical function abilities.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Locke, Andrea L.lockeal@upmc.eduALOCKE
Date: 2 December 2009
Date Type: Completion
Defense Date: 6 October 2009
Approval Date: 2 December 2009
Submission Date: 1 November 2009
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: School of Education > Health, Physical, Recreational Education
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: body mass index; obesity; physical function
Other ID:, etd-11012009-153532
Date Deposited: 10 Nov 2011 20:03
Last Modified: 19 Dec 2016 14:37


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