Dataset Information

Dyadic Dynamics in a Randomized Weight Loss Intervention.

ABSTRACT: Despite health and economic burdens associated with overweight and obesity, long-term weight loss intervention efforts have been largely unsuccessful. Observations that weight status tends to cluster in social groups, and findings showing "ripple" effects of weight change within social clusters, raise questions about the impact of social relationships on weight loss.Through a reanalysis of data from a randomized weight loss intervention, this study compared dyadic dynamics in intervention participants and in-home partners.Over the course of 18 months, data was collected from 201 pairs enrolled in either behavioral weight loss treatment (BWL) or treatment including partners and providing items to facilitate healthy choices at home (BWL?+?H). Using a dyadic growth curve model, covariance between baseline BMI, BMI change trajectories, and starting BMI and BMI trajectory for both the self and the other were examined.There were strong indicators of dependence in the data. Baseline BMI was positively correlated for both treatment groups. In the BWL?+?H condition, BMI change trajectories were positively correlated. In the BWL condition, this reversed: Change trajectories were negatively correlated. Additionally, partner BMI and primary participant BMI change were positively correlated, indicating that a heavier partner at baseline related to less weight loss.Social relationships exert a significant influence on weight loss outcomes. Depending on the intervention group, these influences may help (BWL?+?H) or hinder (BWL). It may be that home intervention changed social support and interaction in important ways and that these effects could be effectively harnessed to implement more effective interventions (NCT00200330).

SUBMITTER: Cornelius T

PROVIDER: S-EPMC4935664 | biostudies-other | 2016 Aug

REPOSITORIES: biostudies-other

ACCESS DATA

Publications

Dyadic Dynamics in a Randomized Weight Loss Intervention.

Cornelius Talea T Gettens Katelyn K Gorin Amy A AA

Annals of behavioral medicine : a publication of the Society of Behavioral Medicine 20160801 4

<h4>Background</h4>Despite health and economic burdens associated with overweight and obesity, long-term weight loss intervention efforts have been largely unsuccessful. Observations that weight status tends to cluster in social groups, and findings showing "ripple" effects of weight change within social clusters, raise questions about the impact of social relationships on weight loss.<h4>Purpose</h4>Through a reanalysis of data from a randomized weight loss intervention, this study compared dya ...[more]

PMID: 26865258

Similar Datasets

Project description:BACKGROUND:Rising obesity levels remain a major public health concern due to the clear link with several comorbidities such as diabetes. Diabetes now affects 6% of the UK population. Modest weight loss of 5% to 10% has been shown to be associated with significant reductions in blood sugar, lipid, and blood pressure levels. Men have been shown to be attracted to programs that do not require extensive face-to-face time commitments, illustrating the potential audience available for health behavior change via the Web. OBJECTIVE:The objective of our study was to evaluate the feasibility and acceptability of a Web-based weight loss intervention in men with type 2 diabetes. METHODS:We conducted a pilot, parallel 2-arm, individually randomized controlled trial with embedded process evaluation. Participants were randomly assigned in a one-to-one ratio to the usual care group or the 12-month Web-based weight loss intervention, including dietitian and exercise expert feedback. Face-to-face recruitment and assessment were performed by the researcher unblinded. Data collected included weight, height, body mass index (BMI), and waist circumference, together with an audit trail of eligibility, recruitment, retention, and adherence rates. A process evaluation (website use data and qualitative interviews) monitored adherence, acceptability, and feasibility of the intervention. RESULTS:General practice database searches achieved the recruitment target (n=61) for the population of men with type 2 diabetes, of whom 66% (40/61) completed 3-month follow-up measurements. By 12 months, the retention rate was 52% (32/61), with 12 of the 33 men allocated to the intervention group still active on the website. The intervention was seen as acceptable by the majority of participants. We gained insights about acceptability and use of the website from the parallel process evaluation. CONCLUSIONS:Recruitment to the Web-based weight loss intervention was successful. Results are descriptive, but there were positive indications of increased weight loss (in kilograms and as a percentage), and reduced waist circumference and BMI for the intervention group from 3 to 12 months, in comparison with control. This research adds to the evidence base in relation to incorporating a Web-based weight loss intervention within the UK National Health Service (NHS). NHS weight loss services are struggling to provide sufficient referrals. Therefore, alternative modes of delivery, with the potential to reduce health professional input and time per patient while still enabling individual and tailored care, need to be investigated to identify whether they can be effective and thus benefit the NHS. TRIAL REGISTRATION:International Standard Randomized Controlled Trial Number (ISRCTN): 48086713; http://www.isrctn.com/ISRCTN48086713 (Archived by WebCite at http://www.webcitation.org/6rO4xSlhI).

Project description:BackgroundBehavioral weight loss programs typically enroll 12-40 people into groups that then suffer from declining engagement over time. Web-based patient communities, on the other hand, typically offer no limits on capacity and membership is fluid. This model may be useful for boosting engagement in behavioral weight loss interventions, which could lead to better outcomes.ObjectiveIn this study, we aimed to examine the feasibility and acceptability of continuously enrolling participants into a Facebook-delivered weight loss intervention for the first 8 of 16 weeks relative to the same intervention where no new participants were enrolled after randomization.MethodsWe conducted a randomized pilot trial to compare a Facebook weight loss group that used open enrollment with a group that used closed enrollment on feasibility and acceptability in adults with BMI 27-45 kg/m2. The feasibility outcomes included retention, engagement, and diet tracking adherence. We described the percentage loss of ≥5% weight in both groups as an exploratory outcome. We also explored the relationship between total volume of activity in the group and weight loss. The participants provided feedback via web-based surveys and focus groups.ResultsRandomized participants (68/80, 85% women) were on average, aged 40.2 (SD 11.2) years with a mean BMI of 34.4 (SD 4.98) kg/m2. We enrolled an additional 54 participants (50/54, 93% female) in the open enrollment condition between weeks 1 and 8, resulting in a total group size of 94. Retention was 88% and 98% under the open and closed conditions, respectively. Randomized participants across conditions did not differ in engagement (P=.72), or diet tracking adherence (P=.42). Participant feedback in both conditions revealed that sense of community was what they liked most about the program and not enough individualized feedback was what they liked the least. Weight loss of ≥5% was achieved by 30% (12/40) of the participants randomized to the open enrollment condition and 18% (7/40) of the participants in the closed enrollment condition. Exploratory analyses revealed that the open condition (median 385, IQR 228-536.5) had a greater volume of engagement than the closed condition (median 215, IQR 145.5-292; P=.007). Furthermore, an increase of 100 in the total volume of engagement in the Facebook group each week was associated with an additional 0.1% weekly weight loss among the randomized participants (P=.02), which was independent of time, individual participant engagement, and sociodemographic characteristics.ConclusionsOpen enrollment was as feasible and acceptable as closed enrollment. A greater volume of engagement in the Facebook group was associated with weight loss, suggesting that larger groups that produce more engagement overall may be beneficial. Future research should examine the efficacy of the open enrollment approach for weight loss in a fully powered randomized trial.Trial registrationClinicalTrials.gov NCT02656680; https://clinicaltrials.gov/ct2/show/NCT02656680.

Project description:BackgroundDNA methylation age (mAge), a methylation biomarker for the aging process, might serve as a more accurate predictor of morbidity and aging status than chronological age. We evaluated the role of multiple factors, including fat deposition, cardiometabolic risk factors and lifestyle weight-loss intervention, on the deviation of mAge from chronological age (mAge deviation) or 18-month change in mAge (?mAge). In this sub-study of the CENTRAL magnetic resonance imaging weight-loss trial, we evaluated mAge by a validated 240-CpG-based prediction formula at baseline and after 18-month intervention of either low fat (LF) or mediterranean/low carbohydrate (MED/LC) diets.ResultsAmong 120 CENTRAL participants with abdominal obesity or dyslipidemia, mAge (mean?±?SD: 60.3?±?7.5 years) was higher than the chronological age (48.6?±?9.3 years) but strongly correlated (r?=?0.93; p?=?3.1?×?10-53). Participants in the lowest tertile of mAge deviation from their chronological age had significantly lower waist-circumference, visceral adipose tissue, intrahepatic fat (IHF) content, fasting-glucose and HOMA-IR, as compared with participants in the highest sex-specific residual tertile (p?<?0.05 for all). IHF% remained associated with greater mAge deviation after further adjustments (??=?0.23; p?=?0.02). After 18-month weight-loss lifestyle intervention, mAge remained significantly correlated with chronological age (r?=?0.94, p?=?1.5?×?10-55). mAging occurred, with no difference between lifestyle intervention groups (??=?0.9?±?1.9 years in MED/LC vs. ??=?1.3?±?1.9 years in LF; p?=?0.2); however, we observed a mAging attenuation in successful weight losers (>?5% weight loss) vs. weight-loss failures ( ??=?0.6 years vs. ??=?1.1 years; p?=?0.04), and in participants who completed the trial with healthy liver fat content (<?5% IHF) vs. participants with fatty liver (??=?0.6 years vs. ??=?1.8 years; p?=?0.003). Overall, 18 months of weight-loss lifestyle intervention attenuated the mAging of the men, mainly the older, by 7.1 months than the expected (p?<?0.05).ConclusionsLifestyle weight-loss intervention may attenuate mAging. Deviation of mAge from chronological age might be related to body fat distribution and glycemic control and could indicate biological age, health status and the risk for premature cardiometabolic diseases.Trial registrationClinicalTrials.gov NCT01530724. Registered 10 February 2012, https://clinicaltrials.gov/ct2/show/study/NCT01530724 .

Dataset Information

Dyadic Dynamics in a Randomized Weight Loss Intervention.

Publications

Dyadic Dynamics in a Randomized Weight Loss Intervention.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure