Interventions to reduce and prevent childhood obesity in low-income and middle-income countries: a systematic review and meta-analysis.

BACKGROUND: 70% of children with obesity and overweight live in low-income and middle-income countries. Several interventions have been done to reduce the prevalence of childhood obesity and prevent incident cases. Hence, we did a systematic review and meta-analysis to determine the effectiveness of these interventions in reducing and preventing childhood obesity. METHODS: We conducted a search for randomised controlled trials and quantitative non-randomised studies published on MEDLINE, Embase, Web of Science, and PsycINFO databases between Jan 1, 2010, and Nov 1, 2022. We included interventional studies on the prevention and control of obesity in children up to age 12 years in low-income and middle-income countries. Quality appraisal was performed using Cochrane's risk-of-bias tools. We did three-level random-effects meta-analyses and explored the heterogeneity of studies included. We excluded critical risk-of-bias studies from primary analyses. We assessed the certainty of evidence using the Grading of Recommendations Assessment, Development, and Evaluation. FINDINGS: The search generated 12 104 studies, of which eight studies were included involving 5734 children. Six studies were based on obesity prevention, most of which targeted behavioural changes with a focus on counselling and diet, and a significant reduction in BMI was observed (standardised mean difference 2·04 [95% CI 1·01-3·08]; p<0·001). In contrast, only two studies focused on the control of childhood obesity; the overall effect of the interventions in these studies was not significant (p=0·38). The combined studies of prevention and control had a significant overall effect, with study-specific estimates ranging between 0·23 and 3·10, albeit with a high statistical heterogeneity (I2>75%). INTERPRETATION: Preventive interventions, such as behavioural change and diet modification, are more effective than control interventions in reducing and preventing childhood obesity. FUNDING: None.

Benefits and barriers to physical activity among African women: A systematic review.

Black women have always been likened to being a less physically active group compared to women of other races/ethnicity, with reports of a high prevalence of obesity and other cardiometabolic diseases among them. The purpose of this study is to examine the health benefits of physical activity on women of color, as well as barriers that inhibit their participation. We searched PubMed and Web of Science databases for relevant research articles. Included articles were: Published in the English Language from 2011 to February 2022; conducted predominantly on black women, African women, or African American women. Articles were identified, screened, and data extracted following the Preferred Reporting Item for Systematic Review and Meta-Analysis (PRISMA) guidelines. The electronic search produced 2 043 articles, and 33 articles were reviewed after meeting the inclusion criteria. 13 articles focused on the benefits of physical activity while 20 articles addressed the barriers to physical activity. It was found that physical activity has various benefits for black women participants but they are being hindered from participation by some factors. These factors were grouped into four themes, namely Individual/Intrapersonal barriers, Socio-economic barriers, Social barriers, and Environmental barriers. Various studies have examined the benefits and barriers of physical activity among women of different racial and ethnic backgrounds, but there have been very few studies of African women, with the majority focusing on one geographical area. In addition to exploring these benefits and barriers, this review offers recommendations on the areas researchers should focus on to promote physical activity in this population.