Christina F. Haughton

Methodological quality of behavioural weight loss studies: a systematic review.

This systematic review assessed the methodological quality of behavioural weight loss intervention studies conducted among adults and associations between quality and statistically significant weight loss outcome, strength of intervention effectiveness and sample size. Searches for trials published between January, 2009 and December, 2014 were conducted using PUBMED, MEDLINE and PSYCINFO and identified ninety studies. Methodological quality indicators included study design, anthropometric measurement approach, sample size calculations, intent‐to‐treat (ITT) analysis, loss to follow‐up rate, missing data strategy, sampling strategy, report of treatment receipt and report of intervention fidelity (mean = 6.3). Indicators most commonly utilized included randomized design (100%), objectively measured anthropometrics (96.7%), ITT analysis (86.7%) and reporting treatment adherence (76.7%). Most studies (62.2%) had a follow‐up rate > 75% and reported a loss to follow‐up analytic strategy or minimal missing data (69.9%). Describing intervention fidelity (34.4%) and sampling from a known population (41.1%) were least common. Methodological quality was not associated with reporting a statistically significant result, effect size or sample size. This review found the published literature of behavioural weight loss trials to be of high quality for specific indicators, including study design and measurement. Identified for improvement include utilization of more rigorous statistical approaches to loss to follow up and better fidelity reporting.

Perceived weight status and weight change among a U.S. adult sample

Examine bidirectional associations between weight perception and weight change over time among adults.

Spirituality and Physical Activity and Sedentary Behavior among Latino Men and Women in Massachusetts

INTRODUCTION To examine the relationships between spirituality and physical activity and sedentary behavior in a sample of Latino adults in Massachusetts. DESIGN This is a cross-sectional analysis of the Lawrence Health and Well Being Study; a study that was conducted among patients at the Greater Lawrence Family Health Center (GLFHC) in Lawrence, Massachusetts. PARTICIPANTS 602 Latino or Hispanic adults aged 21 to 85 years completed the study. RESULTS There was a significant negative relationship between spirituality and sedentary behavior (β= -.12, p = .004). Although not statistically significant, higher spirituality was associated with increased odds of engaging in physical activity. There were no significant associations between spirituality and physical activity among men or women. Men with greater spirituality were significantly less sedentary (β = -.17, P = .005). There was no relationship between sedentary behavior and spirituality among women. CONCLUSIONS This study found that individuals who are more spiritual are also less sedentary, and this association was stronger in men than women. Findings provide insight for developing future interventions to promote activity in this high-risk population, which has been greatly understudied. Future research endeavors should consider investigating the impact of spirituality-based messages to reduce sedentary behavior among Latinos.

Objective measurement of physical activity outcomes in lifestyle interventions among adults: A systematic review

Valid, reliable, and direct measures of physical activity (PA) are critical to assessing the impact of lifestyle PA interventions. However, little is known about the extent to which objective measures have been used to assess the outcomes of lifestyle PA interventions. This systematic review had two aims: 1) evaluate the extent to which PA is measured objectively in lifestyle PA interventions targeting adults and 2) explore and summarize what objective measures have been used and what PA dimensions and metrics have been reported. Pubmed, Cochrane Central Register, and PsychInfo were searched for lifestyle PA interventions conducted between 2006 and 2016. Of the 342 articles that met the inclusion criteria, 239 studies measured PA via subjective measures and 103 studies measured PA via objective measures. The proportion of studies using objective measures increased from 4.4% to 70.6% from 2006 to 2016. All studies measuring PA objectively utilized wearable devices; half (50.5%) used pedometers only and 40.8% used accelerometers only. A majority of the 103 studies reported steps (73.8%) as their PA metric. Incorporating objective measures of PA should continue to be a priority in PA research. More work is needed to address the challenges of comprehensive and consistent collecting, reporting, and analyzing of PA metrics.

Racial/ethnic representation in lifestyle weight loss intervention studies in the United States: A systematic review

Obesity remains a persistent public health and health disparity concern in the United States. Eliminating health disparities, particularly among racial/ethnic minority groups, is a major health priority in the US. The primary aim of this review was to evaluate representation of racial/ethnic sub-group members in behavioral weight loss interventions conducted among adults in the United States. The secondary aims were to assess recruitment and study design approaches to include racial/ethnic groups and the extent of racial/ethnic sub-group analyses conducted in these studies. PubMed, PsycInfo, Medline, and CINAHL were searched for behavioral weight loss intervention trials conducted in 2009–2015 using keywords: weight, loss, overweight, obese, intervention and trial. Most of the 94 studies included a majority of White participants compared to any other racial/ethnic group. Across the included studies, 58.9% of participants were White, 18.2% were African American, 8.7% were Hispanic/Latino, 5.0% were Asian and 1.0% were Native Americans. An additional 8.2% were categorized as “Other”. Nine of the 94 studies exclusively included minority samples. Lack of adequate representation of racial and ethnic minority populations in behavioral trials limits the generalizability and potential public health impact of these interventions to groups that might most benefit from weight loss. Given racial/ethnic disparities in obesity rates and the burden of obesity and obesity-related diseases among minority groups in the United States, greater inclusion in weight loss intervention studies is warranted.