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Baseline Predictors of Early Weight Loss During a Standard Behavioral Weight Loss Intervention

Byard, Thomas (2020) Baseline Predictors of Early Weight Loss During a Standard Behavioral Weight Loss Intervention. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Lifestyle interventions that target behavior change for weight loss are effective treatments for overweight and obesity. Despite the effectiveness of these interventions, there is variability in weight loss among individuals, with some individuals being more successful with weight loss resulting from these behavioral interventions. There is a lack of consistent baseline factors to assist in identifying for whom these behavioral interventions may be most effective as a treatment for overweight and obesity. Recently, early weight loss in response to these behavioral interventions has been associated with long-term weight loss success. However, studies have not examined whether baseline factors may be predictive of early weight loss success in response to a behavioral intervention. PURPOSE: This study examined the following aims: 1) the association between early weight loss in a behavioral intervention and weight loss at 6 and 12 months; 2) the association between baseline factors (current behaviors, weight history, psychosocial factors) and early weight loss at 4, 8, and 12 weeks of an intervention. METHODS: Participants (N=383) who participated in a behavioral weight loss intervention (age 45.0±7.9 years, BMI 32.4±3.8 kg/m2) self-reported baseline behaviors, weight history, and psychosocial factors. Weight was measured at baseline, 4 weeks, 8 weeks, 12 weeks, 6 months, and 12 months of the intervention. Multi-level regression was applied to examine the association between baseline factors and weight loss trajectory from 0-4, 0-8, and 0-12 weeks. RESULTS: Early weight loss at 4, 8, and 12 weeks was associated with weight loss at 6 and 12 months. Several baseline behaviors, weight history, and psychosocial factors were associated with early weight loss trajectory; however, the effect that each individual variable might have on weight loss trajectory was modest. CONCLUSIONS: These findings demonstrate there are baselines factors reflective of current behaviors, weight history, and psychosocial domains associated with early weight loss. These findings may suggest that there are baseline factors that could potentially be intervention targets to enhance early weight loss, which may then contribute to long-term weight loss. However, further examination of these factors should be the focus of future research.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Byard, Thomastdb12@pitt.edutdb12
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorJakicic, Johnjjakicic@pitt.edujjakicic
Committee MemberVenditti, Elizabethemv2@pitt.eduemv2
Committee MemberPage, Lindsaylpage@pitt.edulpage
Committee MemberDavis, Kelliannkkd2@pitt.edukkd2
Committee MemberRogers,
Date: 2 September 2020
Date Type: Publication
Defense Date: 13 July 2020
Approval Date: 2 September 2020
Submission Date: 4 August 2020
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 175
Institution: University of Pittsburgh
Schools and Programs: School of Education > Health and Physical Activity
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: predictors baseline behavior psychosocial weight history early weight loss trajectory depression sleep weight loss factors trajectory
Date Deposited: 02 Sep 2020 14:48
Last Modified: 02 Sep 2020 14:48


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