Randomized Controlled Trial to Prevent Infant Overweight in a High-Risk Population

Lessons for the UK on implementation and evaluation of breastfeeding support: evidence syntheses and stakeholder engagement

Background

Breastfeeding impacts positively on multiple health outcomes, but < 50% of UK women breastfeed at 8 weeks. Women with long-term conditions face additional challenges in breastfeeding.

Objectives

To synthesise global and UK evidence to co-create an implementation and evaluation toolkit for cost-effective breastfeeding support in the NHS.

Design

Evidence syntheses with stakeholder engagement.

Review methods

Systematic reviews examined effectiveness of breastfeeding support for (1) healthy women and (2) women with long-term conditions using Cochrane Pregnancy and Childbirth Group methods. Mixed-methods systematic reviews synthesised process evaluations of effective breastfeeding support interventions for healthy women and experiences of receiving/providing support for breastfeeding women with long-term conditions. Cross-study synthesis integrated qualitative and quantitative findings. Systematic reviews synthesised evidence on the incremental costs and cost-effectiveness of breastfeeding support following National Institute for Health and Care Excellence guidance. All searches were conducted from May 2021 to October 2022. Stakeholder engagement and toolkit development comprised online discussions, a modified Delphi study, focus groups and four workshops. Participants were 23 stakeholders, 16 parents in the parents' panels, 15 women in the focus groups and 87 stakeholders who attended the workshops.

Results

We found considerably more interventions designed for healthy women (review 1) than aimed at women with long-term conditions (reviews 1 and 4); approximately half of the studies were targeted at groups at higher risk of poor breastfeeding outcomes, and the impact of support may be different in these populations. Despite this, studies from review 2 found that women perceived the provision of support as positive, important and needed. Studies from review 5 echoed a range of suggestions from participants regarding potential strategies to improve breastfeeding support, with the most widely reported being the need to acknowledge the role and influence of other sources of support (e.g. partners, family, friends, peers, external professionals, web-based resources) and involving these sources in the provision of breastfeeding support for women with long-term conditions. In reviews 3 and 6, there was uncertainty about the cost-effectiveness of breastfeeding support interventions due to the limited number of studies and lack of good-quality evidence.

Limitations

There was a lack of evidence for the effectiveness and cost-effectiveness of breastfeeding interventions in the UK. There was often insufficient information reported about intervention characteristics.

Conclusions

'Breastfeeding only' support probably reduces the number of women stopping any or exclusive breastfeeding. The evidence for 'breastfeeding plus' interventions is less consistent, but these may reduce the number of women stopping exclusive breastfeeding at 4-6 weeks and at 6 months. We found no evidence of differential intervention effects regarding mode of provision or provider. Cost-effectiveness is uncertain due to the lack of good-quality evidence. Key enablers of successful implementation were responsiveness and tailoring of interventions to both women's and supporters' needs. Breastfeeding support as delivered in the included studies probably has little to no effect on breastfeeding outcomes for women with long-term conditions. The mixed-methods synthesis and stakeholder work identified that existing interventions may not address the complex needs of these women. The main study output is a co-produced toolkit to guide implementation and evaluation of breastfeeding support services in the UK.

Future work

Evaluation of breastfeeding support for all women, particularly those at risk of poor breastfeeding outcomes (e.g. long-term conditions, deprivation). This could involve tailoring the toolkit to local contexts via implementation and effectiveness studies or using quality improvement studies.

Study registration

This study is registered as PROSPERO CRD42022337239, CRD42021229769 and CRD42022374509. The reviews of economic evidence were not registered; however, the review protocol can be accessed via the repository held by Queen's University Belfast Research Portal (https://pure.qub.ac.uk/).

Funding

This award was funded by the National Institute for Health and Care Research (NIHR) Health and Social Care Delivery Research programme (NIHR award ref: NIHR130995) and is published in full in Health and Social Care Delivery Research; Vol. 12, No. 20. See the NIHR Funding and Awards website for further award information.

Childhood obesity prevention trials: A systematic review and meta-analysis on trial design and the impact of type 1 error

Effect sizes from previously reported trials are often used to determine the meaningful change in weight in childhood obesity prevention interventions because information on clinically meaningful differences is lacking. Estimates from previous trials may be influenced by statistical significance; therefore, it is important that they have a low risk of type 1 error. A systematic review and meta-analysis were conducted to report on the design of child obesity prevention randomized controlled trials and effectiveness according to risk of type 1 error. Eighty-four randomized controlled trials were identified. A large range of assumptions were applied in the sample size calculations. The most common primary outcome was BMI, with detectable effect size differences used in sample size calculations ranging from 0.25 kg/m2 (followed up at 2 years) to 1.1 kg/m2 (at 9 months) and BMI z-score ranging from 0.1 (at 4 years) to 0.67 (at 3 years). There was no consistent relationship between low risk of type 1 error and reports of higher or lower effectiveness. Further clarity of the size of a meaningful difference in weight in childhood obesity prevention trials is required to support evaluation design and decision-making for intervention and policy. Type 1 error risk does not appear to impact effect sizes in a consistent direction.

Associations of Infant Feeding, Sleep, and Weight Gain with the Toddler Gut Microbiome

This study examines how feeding, sleep, and growth during infancy impact the gut microbiome (GM) in toddlers. The research was conducted on toddlers (n = 36), born to Latina women of low-income with obesity. Their mothers completed retrospective feeding and sleeping questionnaires at 1, 6, and 12 months; at 36 months, fecal samples were collected. Sequencing of the 16S rRNA gene (V4 region) revealed that breastfeeding for at least 1 month and the introduction of solids before 6 months differentiated the GM in toddlerhood (Bray-Curtis, pseudo-F = 1.805, p = 0.018, and pseudo-F = 1.651, p = 0.044, respectively). Sleep had an effect across time; at 1 and 6 months of age, a lower proportion of nighttime sleep (relative to 24 h total sleep) was associated with a richer GM at three years of age (Shannon H = 4.395, p = 0.036 and OTU H = 5.559, p = 0.018, respectively). Toddlers experiencing rapid weight gain from birth to 6 months had lower phylogenetic diversity (Faith PD H = 3.633, p = 0.057). These findings suggest that early life nutrition, sleeping patterns, and growth rate in infancy may influence the GM composition. Further verification of these results with objective sleep data and a larger sample is needed.

Breastfeeding in US working mothers: A systematic review

BACKGROUND

Previous studies demonstrate that exclusive breastfeeding has positive long-term health effects on the mother and infant, but research has shown that nearly 50% of mothers do not breastfeed for the recommended amount of time.

OBJECTIVE

This article systematizes previous quantitative research on the impact of work on breastfeeding practices to identify the factors that correlate to the cessation of breastfeeding in working mothers.

METHODS

Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Statements, we performed a systematic review that screened PubMed, CINAHL, PsycINFO, and Academic Search Complete databases for articles relating to maternal employment and breastfeeding.

RESULTS

Of the 13,106 articles assessed for eligibility, 21 studies met all requirements and were included in this systematic review. The 21 articles were divided into study type and methods, participant demographics, study outcomes, and additional factors that included stressors and stress levels, factors that increased or decreased rates of breastfeeding, and feeding methods. Articles outside of the United States were excluded due to differences in maternity leave policies of other countries impacting the data.

CONCLUSION

Cessation of breastfeeding and breastfeeding outcomes were seen to have a strong association with maternal employment, specifically with the policies and employer support in the workplace. Other factors such as race, level of education, and stress were also shown to relate to breastfeeding outcomes and are important to consider in future public health interventions and workplace policies.

Trends in overweight and obesity in children under 24 months of age in Mexico (2012-2020): analysis of four national health surveys

The prevalence of childhood obesity has increased rapidly in Mexico, with significant consequences for the population's health in the future. Little is known about the prevalence of obesity in children under two years of age, even though this life stage is fundamental to prevent this condition. This study aims to determine the magnitude, distribution, and trends of overweight and obesity in children under 24 months of age using the Mexican National Health and Nutrition Surveys (ENSANUT) conducted in the last 10 years. The data presented here are derived from four ENSANUTs, carried out in Mexico in 2012, 2016, 2018, and 2020. They include 6,719 infants under 24 months with complete anthropometric data (weight/height) by age, gender, Indigeneity, area of residence, and socioeconomic status. The risk of overweight levels and overweight + obesity rates were calculated according to World Health Organization guidelines. We identified that infants < 12 months currently have a higher prevalence of overweight + obesity (10.3%) and that those aged 12 to 23 months are generally at a higher risk of overweight (26.1%). The most relevant findings of this study, linking weight trends to sex, region, socioeconomic status, and indigeneity, show that overweight and obesity prevalences vary across the Mexican population, without presenting a specific behavior. There is a high prevalence of overweight and obesity among Mexican infants and a slight trend toward increased obesity in infants < 12 months. Weight monitoring and obesity prevention interventions focused on the first 1,000 days of life are essential.

Impact of an early 1000-day intervention for obesity prevention on adiposity and BMI at two years of age: A quasi-experimental study

Background

The 1000-day period encompassing pregnancy and the first two years of postnatal life is critical for preventing childhood obesity. Existing interventions targeting this period have been characterised by great variability in duration, objectives, and evaluation indicators. We aimed to evaluate the impact of an intervention developed during the entire 1000-day period on body mass index and body fat percentage at two years of age.

Methods

We designed a prospective, interventional, quasi-experimental study (ie, without randomisation or blinding of both groups) targeting mother-child pairs from the beginning of pregnancy up to two years of age belonging to the basic health area of Puerto Real (Cádiz). We developed and delivered an intervention from pregnancy to two years and assessed its effect.

Results

The duration of breastfeeding and vitamin D supplementation increased significantly after the intervention. The intervention group showed lowed skinfolds values, a significantly lower body fat percentage, as well as a lower accumulation of factor at two years than the control group.

Conclusions

The intervention has had an impact on body fat percentage at two years, potentially justified through its overall effect and the lower accumulation of early risk factors.

A Multimethod Evaluation of the Futuros Fuertes Intervention to Promote Healthy Feeding, Screen Time, and Sleep Practices

OBJECTIVE

1) To evaluate the impact of the Futuros Fuertes intervention on infant feeding, screen time, and sleep practices and 2) To use qualitative methods to explore mechanisms of action.

METHODS

Low-income Latino infant-parent dyads were recruited from birth to 1 month and randomized to Futuros Fuertes or a financial coaching control. Parents received health education sessions from a lay health educator at well-child visits in the first year of life. Parents received two text messages per week that reinforced intervention content. We assessed infant feeding, screen time, and sleep practices via surveys. body mass index z-score (BMI-z) was measured at 6 and 12 months. Seventeen parents from the intervention arm participated in a semi-structured interview that explored parental experiences with the intervention.

RESULTS

There were n = 96 infant-parent dyads randomized. Fruit intake was higher in the intervention group at 15 months (1.1 vs 0.86 cups p = 0.05). Breastfeeding rates were higher in intervention participants at 6 months (84% vs 59% p = 0.02) and 9 months (81% vs 51% p = 0.008). Mean daily screen time was lower among intervention participants at 6 months (7 vs 22 min p = 0.003), 12 months (35 vs 52 min p = 0.03), and 15 months (60 vs 73 min p = 0.03). Major qualitative themes include 1) parental trust in intervention messaging 2) changes in feeding and screen time parenting practices, 3) text messages supported behavior change for parents and family members, and 4) varying effectiveness of intervention on different health behaviors.

CONCLUSIONS

Low-income Latino infants participating in the Futuros Fuertes intervention had modestly healthier feeding and screen time practices compared to control participants.

Influences of Parenting Education on Development of Obesity Among Young Children

OBJECTIVE

This project aimed to prevent obesity in high-risk infants using community health workers.ßto provide mothers with culturally appropriate nutrition and health education.

METHODS

This randomized controlled trial enrolled mothers prenatally and infants at birth. Mothers were Spanish-speaking WIC participants with obesity. Trained, Spanish-fluent, community health workers visited homes of intervention mothers to encourage breastfeeding, and promote delayed introduction of solid foods, adequate sleep, limited screen time, and active play. A blinded research assistant collected data at the home. Outcomes were weight-for-length and BMI-z scores, obesity at age 3.ßyears and percent time obese during follow-up. Data were analyzed using multiple variable regression.

RESULTS

Of 177 children enrolled at birth, 108 were followed to age 30...36.ßmonths. At the final visit, 24% of children were obese. Obese status at age 3.ßdid not differ between intervention and control (P.ß=.ß.32). Using BMI-z at the final visit, we observed a significant interaction between education and breastfeeding (P.ß=.ß.01). Time spent while obese from birth until age 30...36.ßmonths, by multiple variable analysis, did not show significant differences between intervention and control, but breastfed children experienced significantly less time obese than formula fed (P.ß=.ß.03). Formula-fed children in the control group, spent 29.8% of time obese, while breastfed infants in the intervention group spent 11.9% of time obese.

CONCLUSIONS

The educational intervention did not prevent obesity at age 3.ßyears. However, time spent obese from birth to age 3.ßyears was best in breastfed children living in homes regularly visited by community health workers.

The effectiveness of interventions during the first 1,000 days to improve energy balance-related behaviors or prevent overweight/obesity in children from socio-economically disadvantaged families of high-income countries: a systematic review

This narrative systematic review examined effectiveness of interventions during pregnancy and up to 2 years of age in improving energy balance-related behaviors or prevent overweight/obesity in children from families experiencing socio-economic disadvantage. We identified 24 interventions, from 33 articles, since 1990. Overall, despite their heterogeneity and variability in internal and external validity, there was some evidence of beneficial impact of interventions on obesity risk (4/15), and associated behaviors, e.g.: breastfeeding (9/18), responsive feeding (11/16), diet (7/8), sedentary (1/3) and movement (4/7) behaviors, and sleep (1/2). The most effective interventions aimed at promoting breastfeeding commenced antenatally; this was similar for the prevention of obesity, provided the intervention continued for at least 2 years postnatally and was multi-behavioral. Effective interventions were more likely to target first-time mothers and involve professional delivery agents, multidisciplinary teams and peer groups. Among ethnic/racial minorities, interventions delivered by lay agents had some impact on dietary behavior but not weight outcomes. Co-creation with stakeholders, including parents, and adherence to theoretical frameworks were additional ingredients for more pragmatic, inclusive, non-judgmental, and effective programs. The growing body of evidence on obesity prevention interventions targeting families experiencing socio-economic disadvantage is promising for reducing early inequalities in obesity risk.

Effect of maternal hypertensive disorders during pregnancy on offspring's early childhood body weight: A population-based cohort study

OBJECTIVE

The prevalence of hypertensive disorder during pregnancy (HDP) and childhood obesity is increasing worldwide. HDP or obesity in mothers can increase the risk of overweight/obesity (OWOB) in their children. Few longitudinal studies have examined the associations of maternal body weight with the growth and risk factors for overweight in infants born to mothers with HDP. This study examined the risk factors for childhood OWOB through the age of 66 months in children born to mothers with HDP.

MATERIALS AND METHODS

In total, 24,200 pairs of mothers and their children were selected from the Taiwan Birth Cohort Study. The children's body weights were classified and analyzed to determine infant growth at birth and at the ages of 12, 24, 36, and 66 months. Multiple logistic regression analyses with different model settings were performed to identify the factors affecting growth and childhood OWOB in the children of mothers with HDP.

RESULTS

The average birth weight of children was lower in the HDP group than in the non-HDP group. The catch-up phenomenon began at the age of 18 months. The incidence of OWOB was higher in the children in the HDP group than in those in the non-HDP group from the age of 24 months and increased with the children's age. At every age point, maternal overweight before pregnancy was the main risk factor for childhood OWOB, and this effect increased with the children's age (odds ratio [OR]: 1.83 at 66 months). The effect of excessive maternal gestational weight gain on childhood OWOB was significant (OR: 1.26-1.44 for various age points).

CONCLUSION

Maternal overweight is the main risk factor for OWOB in children born to mothers with HDP. After adjusting for related confounders, we determined that HDP did not exert a significant effect on the risk of childhood OWOB.

Effects of the Sleep SAAF responsive parenting intervention on rapid infant weight gain: A randomized clinical trial of African American families

Responsive parenting (RP) interventions reduce rapid infant weight gain but their effect for underserved populations is largely unknown. The Sleep SAAF (Strong African American Families) study is a two-arm randomized clinical trial for primiparous African American mother-infant dyads that compares an RP intervention to a child safety control over the first 16 weeks postpartum. Here we report on intervention effects on rapid infant weight gain and study implementation. Families were recruited from a mother/baby nursery shortly after delivery. Community Research Associates (CRAs) conducted intervention home visits at 3 and 8 weeks postpartum, and data collection home visits at 1, 8, and 16 weeks postpartum. To examine rapid infant weight gain, conditional weight gain (CWG) from 3 to 16 weeks, the primary outcome, and upward crossing of 2 major weight-for-age percentile lines were calculated. Among the 212 mother-infant dyads randomized, 194 completed the trial (92% retention). Randomized mothers averaged 22.7 years, 10% were married, and 49% participated in the Supplemental Nutrition Assistance Program (SNAP). Adjusting for covariates, mean CWG was lower among RP infants (0.04, 95% CI [-0.33, 0.40]) than among control infants (0.28, 95% CI [-0.08, 0.64]), reflecting non-significantly slower weight gain (p = 0.15, effect size d = 0.24). RP infants were nearly half as likely to experience upward crossing of 2 major weight-for-age percentile lines (14.1%) compared to control infants (24.2%), p = 0.09, odds ratio = 0.52 (95% CI [0.24, 1.12]). Implementation data revealed that participating families were engaged in the intervention visits and intervention facilitators demonstrated high fidelity to intervention materials. Findings show that RP interventions can be successfully implemented among African American families while suggesting the need for modifications to yield stronger effects on infant weight outcomes.

Interventions to support women with overweight or obesity or gestational diabetes mellitus to initiate and continue breastfeeding: Systematic review and meta-analysis

Exclusive breastfeeding is recommended for the first 6 months of life and benefits both mother and child. Women with overweight/obesity or gestational diabetes are at risk for poor breastfeeding outcomes. This review evaluates the efficacy of breastfeeding interventions in these at-risk populations. The review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Five databases were searched for interventions from inception to May 2020. Nineteen trials including 2,740 participants, 226 of which were dyads, were included. Intervention increased any breastfeeding at ≥6 months (OR 1.43, 95% CI [1.05-1.95]), and women in the intervention group were 90% more likely to exclusively breastfeed at 1-2 weeks (OR 1.9, 95% CI [1.17-3.09]) and more than twice as likely to exclusively breastfeed at 4-6 weeks (OR 2.23, 95% CI [1.27-3.90]) within the sensitivity analysis. These findings support breastfeeding interventions improving exclusive early postpartum breastfeeding and any breastfeeding from 6 months in women with gestational diabetes or obesity/overweight. Further randomized controlled trials with harmonized breastfeeding outcome reporting are needed to confirm efficacy.

Recruitment and retention of underrepresented and vulnerable populations to research

Per principles outlined in the Belmont Report, research involving human subjects should minimize risks to participants and maximize benefits to participants and society. Recruitment of participants should be equitable. Once enrolled, participants have the right to withdraw at any point. Researchers must balance these principles with pressures to meet enrollment goals and, in the context of repeated-measures designs, retain participants across time. The purpose of this perspective is to describe the approach and corresponding activities for recruiting and retaining underrepresented and vulnerable populations that are the focus of a transdisciplinary academic research center. To this effort, we offer diverse disciplinary backgrounds, experience working with a wide range of populations (from infants to older adults and across multiple health conditions), and spanning a variety of research designs. Effective strategies offered include partnering with community entities, approaching potential participants where they are and at a time of readiness, using population-appropriate modes of communication and data collection, conducting study activities in familiar settings and at convenient times, maintaining frequent contact, and offering meaningful incentives. These strategies are consistent with population-specific reports found in the extant literature and underscore their cross-cutting nature, with adaptations based on participant and community partner needs and preferences.

Factors affecting the growth of children till the age of three years with overweight whose mothers have diabetes mellitus: A population-based cohort study

Background

The prevalence of diabetes mellitus (DM) during pregnancy and childhood obesity is increasing worldwide. Factors affecting the growth of children with overweight whose mothers had DM are complicated and inconclusive. Few longitudinal studies have focused on the growth of infants with macrosomia born to mothers with DM and the factors influencing their overweight. This study explored risk factors for childhood overweight/obesity (OWOB) among children of mothers with DM. Perinatal, maternal socio-demographic, infant care, and maternal body weight characteristics as well as child growth until age 3 years were analyzed using a longitudinal design.

Methods

In total, 24,200 pairs of mothers and their children from the Taiwan Birth Cohort Study were included. Combined Taiwan Children Growth Curve report classifications were analyzed for infant growth at birth and at 6, 12, 18, 24, and 36 months old (m/o). A multiple logistic regression analysis with different model settings was used to assess factors affecting the growth of high birth weight children of mothers with diabetic mellitus (HODM).

Results

Children in the HODM group had a higher average body weight than did those in the non-DM group at different age stages. Relative to the non-DM group, weight gain in the HODM group was slower before 18 m/o but faster from 18 to 36 m/o, particularly after 24 m/o. Maternal DM was a major risk factor for childhood OWOB (odds ratio [OR]: 3.25–3.95). After adjustment for related confounders, the OR was 2.19–3.17. Maternal overweight or obesity and higher gestational weight gain were greater risk factors for childhood OWOB at 3 years old after adjusted maternal DM and other selected confounders (OR: 1.45 and 1.23, respectively). Breastfeeding until 6 m/o was a protective factor against childhood OWOB (OR: 0.95). The HODM and non-DM groups did not differ significantly in perinatal, maternal socio-demographic, or infant care characteristics.

Conclusions

Maternal DM is a major factor of childhood OWOB. Maternal body weight before and after pregnancy affects childhood OWOB, and this effect increases with the child’s age.

Feasibility of a culturally adapted early childhood obesity prevention program among migrant mothers in Australia: a mixed methods evaluation

INTRODUCTION

Healthy Beginnings is an established nurse-led early childhood obesity prevention program that promotes healthy infant feeding practices and active play in the early years of life. To improve engagement with culturally and linguistically diverse populations, the Healthy Beginnings program delivered by telephone was culturally adapted and implemented with Arabic- and Chinese-speaking mothers in Sydney, Australia. The cultural adaptation process has been published separately. In this article, we aimed to evaluate the feasibility of the culturally adapted program.

METHODS

In 2018-2019, the culturally adapted Healthy Beginnings program was implemented with Arabic- and Chinese-speaking women recruited from antenatal clinics in Sydney. At four staged timepoints (from third trimester until 6 months of age), mothers were sent culturally adapted health promotion booklets and text messages and offered four support calls from bi-cultural child and family health nurses in Arabic and Chinese. A mixed methods evaluation included a) baseline and 6-month telephone surveys, followed by b) semi-structured follow-up interviews with a subset of participating mothers and program delivery staff. Main outcomes of this feasibility study were reach (recruitment and retention), intervention dose delivered (number of nurse support calls completed) and acceptability (appropriateness based on cognitive and emotional responses).

RESULTS

At recruitment, 176 mothers were eligible and consented to participate. Of 163 mothers who completed the baseline survey, 95% completed the program (n = 8 withdrew) and 83% completed the 6-month survey (n = 70 Arabic- and n = 65 Chinese-speaking mothers). Most mothers (n = 127, 78%) completed at least one nurse support call. The qualitative analysis of follow-up interviews with 42 mothers (22 Arabic- and 20 Chinese-speaking mothers) and 10 program delivery staff highlighted the perceived value of the program and the positive role of bi-cultural nurses and in-language resources. Mothers who completed more nurse support calls generally expressed greater acceptability.

CONCLUSIONS

The culturally adapted Healthy Beginnings program was feasible to deliver and acceptable to Arabic- and Chinese-speaking mothers. Our results highlight the importance of in-language resources and individualised bi-cultural nurse support by telephone for supporting culturally and linguistically diverse migrant families with infant feeding and active play. These findings support the potential for program refinements and progression to an effectiveness trial.

Addressing obesity in the first 1000 days in high risk infants: Systematic review

Early intervention is critical for addressing the challenge of childhood obesity. Yet many preventive interventions do not target infants most at risk of future overweight or obesity. This systematic review examines interventions delivered before 2 years that aim to ameliorate excess weight gain among infants at high risk of overweight or obesity, due to sociodemographic characteristics, parental weight or health status, infant feeding or health behaviours. We searched six databases for interventions: (a) delivered before age two, (b) specifically aimed at infants at high risk of childhood obesity and (c) that reported outcomes by weight status beyond 28 days. The search identified over 27,000 titles, and 49 papers from 38 studies met inclusion criteria: 10 antenatal interventions, 16 postnatal and 12 conducted both before and after birth. Nearly all targeted infant and/or maternal nutrition. Studies varied widely in design, obesity risk factors, outcomes and quality. Overall, nine interventions of varying quality reported some evidence of significantly improved child weight trajectory, although effects tended to diminish over time. Interventions that improved weight outcomes tended to engage parents for a longer period, and most offered health professional input and support. Two studies of limited quality reported significantly worse weight outcomes in the intervention group.

A Review of Registered Randomized Controlled Trials for the Prevention of Obesity in Infancy

Childhood overweight and obesity is a worldwide public health issue. Our objective was to describe planned, ongoing and completed randomized controlled trials (RCTs) designed for the prevention of obesity in early childhood. Two databases (World Health Organization International Clinical Trials Registry Platform, ClinicalTrials.gov) were searched to identify RCTs with the primary aim of preventing childhood obesity and at least one outcome related to child weight. Interventions needed to start in the first two years of childhood or earlier, continue for at least 6 months postnatally, include a component related to lifestyle or behaviours, and have a follow up time of at least 2 years. We identified 29 unique RCTs, implemented since 2008, with most being undertaken in high income countries. Interventions ranged from advice on diet, activity, sleep, emotion regulation, and parenting education through to individual home visits, clinic-based consultations, or group education sessions. Eleven trials published data on child weight-related outcomes to date, though most were not sufficiently powered to detect significant effects. Many trials detected improvements in practices such as breastfeeding, screen time, and physical activity in the intervention groups compared to the control groups. Further follow-up of ongoing trials is needed to assess longer-term effects.

Sleep-wake patterns in newborns are associated with infant rapid weight gain and incident adiposity in toddlerhood

BACKGROUND

Rapid weight gain (RWG) by 6 months of life is a significant risk factor of childhood overweight (OW)/obesity. Infant sleep patterns are associated with incident OW in childhood, but few have examined its relationship with RWG.

OBJECTIVE

Examine associations between newborn sleep-wake patterns and incident RWG at 6 months of life and OW at 36 months.

METHODS

Low-income Mexican/Mexican-American women with OW/obesity and their infants (n = 126) enrolled in a 1-year randomized controlled trial designed to prevent incident, infant RWG and toddlerhood OW/obesity. Sleep pattern metrics at 1 month were extracted from the Brief Infant Sleep Questionnaire-Revised. Outcome measures included RWG (>0.67 positive change in weight-for-age Z-score) from birth to 6 months and incident OW (body mass index percentile ≥85) at 36 months.

RESULTS

By 6 months, 35.7% (n = 45) of infants experienced RWG, and by 36 months 42.3% (n = 41) of toddlers were OW. Napping ≥5x/day at 1-month was significantly associated with decreased odds for RWG compared to napping <5x (OR = 0.11, 95%CI:0.02, 0.63). Each 1-hour increase in nocturnal vs diurnal sleep was associated with greater odds of incident OW at 36 mos (OR = 1.51, 95%CI:1.13, 2.03).

CONCLUSIONS

Early-life sleep patterns related to infant nap frequency and nocturnal vs diurnal sleep distribution were associated with obesity outcomes and may be important intervention targets to prevent lasting consequences on infant growth.

Home-based intervention for non-Hispanic black families finds no significant difference in infant size or growth: results from the Mothers & Others randomized controlled trial

Background

Non-Hispanic black (NHB) infants are twice as likely as non-Hispanic white infants to experience rapid weight gain in the first 6 months, yet few trials have targeted this population. The current study tests the efficacy of “Mothers & Others,” a home-based intervention for NHB women and their study partners versus an attention-control, on infant size and growth between birth and 15 months.

Methods

Mothers & Others was a two-group randomized controlled trial conducted between November 2013 and December 2017 with enrollment at 28-weeks pregnancy and follow-up at 3-, 6-, 9-, 12-, and 15-months postpartum. Eligible women self-identified as NHB, English-speaking, and 18–39 years. The obesity prevention group (OPG) received anticipatory guidance (AG) on responsive feeding and care practices and identified a study partner, who was encouraged to attend home visits. The injury prevention group (IPG) received AG on child safety and IPG partners only completed study assessments. The primary delivery channel for both groups was six home visits by a peer educator (PE). The planned primary outcome was mean weight-for-length z-score. Given significant differences between groups in length-for-age z-scores, infant weight-for-age z-score (WAZ) was used in the current study. A linear mixed model, using an Intent-To-Treat (ITT) data set, tested differences in WAZ trajectories between the two treatment groups. A non-ITT mixed model tested for differences by dose received.

Results

Approximately 1575 women were screened for eligibility and 430 were enrolled. Women were 25.7 ± 5.3 years, mostly single (72.3%), and receiving Medicaid (74.4%). OPG infants demonstrated lower WAZ than IPG infants at all time points, but differences were not statistically significant (WAZ_diff = − 0.07, 95% CI − 0.40 to 0.25, p = 0.659). In non-ITT models, infants in the upper end of the WAZ distribution at birth demonstrated incremental reductions in WAZ for each home visit completed, but the overall test of the interaction was not significant (F_2,170 = 1.41, p = 0.25).

Conclusions

Despite rich preliminary data and a strong conceptual model, Mothers & Others did not produce significant differences in infant growth. Results suggest a positive impact of peer support in both groups.

Trial registration

ClinicalTrials.gov, NCT01938118, 09/10/2013.

Calories, Caffeine and the Onset of Obesity in Young Children

OBJECTIVE

High calorie foods and beverages, which often contain caffeine, contribute to child overweight/obesity. We evaluated the results of an educational intervention to promote healthy growth in very young children. Secondarily, we used detailed diet data to explore the association of nutrient intake with the early development of overweight and obesity.

METHODS

Mothers were obese Latina women, enrolled prenatally, and their infants. Specially trained community health workers provided breastfeeding support and nutrition education during 10 home visits, birth to 24 months. At follow-up, age 18 to 36 months, we measured growth and completed detailed diet recalls (1-7 recall days/child).

RESULTS

Of 174 infants randomized, 106 children were followed for 24 to 36 months. The educational intervention did not prevent overweight/obesity. Forty-two percent of children became overweight or obese. Fifty-eight percent of children consumed caffeine on at least 1 recall day. Mean intake was 0.48 mg/kg/day. Caffeine correlated with higher consumption of calories, and added sugar and decreased intake of protein, fiber and dairy. Compared with days without caffeine, on days when caffeine was consumed, children ingested 121 more calories and 3.8 gm less protein. Children frequently consumed less than the recommended daily intake of key nutrients such as fiber, vegetables, whole fruit, and vitamins.

CONCLUSIONS

Caffeine was a marker for increased intake of calories and decreased intake of key nutrients. When discussing dietary intake in early childhood, practitioners should screen for nutrient deficiency in young children and recommend limiting the intake of caffeinated foods and beverages.

A Comparison of Breastfeeding Exposure, Attitude, and Knowledge Between Collegiate African American and White Males with no Biological Children

BACKGROUND

Human milk is the preferred source of infant nourishment; yet, acceptance of human milk as the norm for infant feeding is debated. In the United States there is a disparity in breastfeeding rates, which are significantly lower in African Americans compared to Whites. Multiple variables appear to influence breastfeeding, including the male partner.

OBJECTIVES

To assess and compare breastfeeding exposure, attitude, and knowledge between African American and White college males with no biological children. A second objective was to explore the relationship between breastfeeding variables and educational attainment, academic major, and sibling presence.

METHODS

A subset of responses from a larger cross-sectional survey were analyzed. African American and White collegiate males aged 18-40 years without biological children were included in the study. The questionnaire included demographic, exposure, attitude, and knowledge items.

RESULTS

A total of 117 African American and 713 White males were included and represented all academic colleges on campus. African American participants documented less exposure to breastfeeding, a more positive attitude, and similar poor knowledge scores compared to their White counterparts. Sibling presence was linked with exposure, and exposure was linked to attitude. Both African American and White science majors scored higher on all factors than humanities or business majors.

CONCLUSIONS FOR PRACTICE

Breastfeeding exposure influences males' attitudes toward breastfeeding. Future research should consider types of exposure to identify the sources most influential. Furthermore, tailoring breastfeeding interventions to increase exposure and knowledge in core wellness courses may improve attitudes and social acceptance among collegiate males.

Relationship among Breastfeeding Exposure, Knowledge, and Attitudes in Collegiate Males Residing in East Texas

BACKGROUND

Researchers exploring breastfeeding attitudes and knowledge among women suggest the decision to breastfeed is influenced by the male partner, yet few studies address males. Because collegiate males will soon enter fatherhood, assessment of their attitudes and knowledge may inform interventions aimed at increasing intention to breastfeed.

RESEARCH AIM

This study aimed to describe collegiate males' exposure to, attitude toward, and knowledge about breastfeeding.

METHODS

A cross-sectional online survey was used with males ≥ 18 years of age enrolled at a Texas public university. Attitude indices measured included social limitations, public displays of breastfeeding, and employer accommodations. Descriptive statistics, correlational and regression analyses were employed.

RESULTS

The participants' (N = 949) average age was 25.48 years; > 80% reported not being fathers. Exposure to breastfeeding was high; > 80% witnessed breastfeeding and/or had someone close breastfeed. High attitude scores indicated social acceptability of breastfeeding. Knowledge appeared limited: only 16% identified the recommendation of exclusive breastfeeding for the first 6 months of life; > 50% overlooked the reduced risk for overweight/obesity, ear infections, diarrhea, or food allergies. Correlations between knowledge, exposure, total attitude, and index scores were positive (p < .01) except for the public displays index. Stepwise multiple regression determined that breastfeeding exposure, knowledge scores, and father's educational level predicted total attitude score, (R² = 0.13, F (3,851) = 44.02, p < .01).

CONCLUSION

The positive attitudes outcome among this male population is promising for breastfeeding support and advocacy. Education efforts improving knowledge will likely increase behavioral intention, resulting in increased breastfeeding rates and duration.

Interventions for supporting the initiation and continuation of breastfeeding among women who are overweight or obese

BACKGROUND

Exclusive breastfeeding is recommended for all infants until six months of age due to the many health benefits for both the mother and infant.Evidence suggests that mothers who are overweight (body mass index (BMI) 25.0 to 29.9 kg/m²) or obese (BMI ≥ 30.0 kg/m²) are less likely to initiate breastfeeding and to breastfeed for a shorter duration. Considering the rising prevalence of overweight and obesity globally and the known benefits of breastfeeding particularly in reducing the long-term risks of obesity and diabetes for infants, establishing effective ways to support and promote breastfeeding in women who are overweight or obese is paramount in achieving the goal of healthier communities.

OBJECTIVES

To assess the effectiveness of interventions to support the initiation or continuation of breastfeeding in women who are overweight or obese.

SEARCH METHODS

On 23 January 2019 we searched Cochrane Pregnancy and Childbirth's Trials Register, ClinicalTrials.gov, the World Health Organization International Clinical Trials Registry Platform (ICTRP) and reference lists of retrieved trials.

SELECTION CRITERIA

Randomised controlled trials (RCTs) and quasi-RCTs that compared interventions to support the initiation and continuation of breastfeeding in women who are overweight or obese. Interventions included social support, education, physical support, or any combination of these. Interventions were compared either with each other or against a control group.

DATA COLLECTION AND ANALYSIS

We assessed all potential trials identified from the search strategy. Two review authors extracted data from each included trial and assessed risk of bias. We resolved discrepancies through discussion with the third review author. We assessed the quality of the evidence using the GRADE approach.

MAIN RESULTS

We found no trials comparing one type of support versus another. We included seven RCTs (including one cluster-RCT) involving 831 women. The number of women in each trial ranged from 36 to 226. The trials were conducted in high-income countries: USA (5 trials); Denmark (1 trial) and Australia (1 trial), between 2006 and 2015. Three trials only included women who were obese prior to pregnancy and four trials included both women who were overweight and women who were obese. We judged risk of bias in the included trials to be mixed; only one trial was judged to be low risk of bias for random sequence generation, allocation concealment and attrition bias.Physical breastfeeding support (manual or electric breast pump) versus usual care (no breast pump)Very low-certainty evidence from one small trial (39 women) looking at a physical support intervention (manual or electric breast pump) versus usual care (no pump) means it is unclear whether physical support improves exclusive breastfeeding at four to six weeks (risk ratio (RR) 0.55, 95% confidence interval (CI) 0.20 to 1.51) or any breastfeeding at four to six weeks (RR 0.65, 95% CI 0.41 to 1.03). The trial did not report other important outcomes of interest in this review: non-initiation of breastfeeding, exclusive or any breastfeeding at six months postpartum.Multiple methods of breastfeeding support versus usual care Six trials (involving 792 women) used multiple methods of support including education and social support through telephone or face-to-face contact. One of these trials also provided physical support through providing a breast pump and a baby sling and one trial provided a small gift to the women at each trial visit. Support in the trials was provided by a professional (four trials) or a peer (two trials). One trial provided group support, with the other five trials supporting women individually. One trial (174 women) did not report on any of our main outcomes of interest.We are unclear about the effects of the intervention because we identified very low-certainty evidence for all of the important outcomes in this review: rate of non-initiation of breastfeeding (average RR 1.03, 95% CI 0.07 to 16.11; 3 trials, 380 women); exclusive breastfeeding at four to six weeks (average RR 1.21, 95% CI 0.83 to 1.77; 4 trials, 445 women); any breastfeeding at four to six weeks (average RR 1.04, 95% CI 0.57 to 1.89; 2 trials, 103 women); rate of exclusive breastfeeding at six months postpartum (RR 7.23, 95% CI 0.38 to 137.08; 1 trial, 120 women); and any breastfeeding at six months postpartum (average RR 1.42, 95% CI 1.08 to 1.87; 2 trials, 223 women).The included trials under the above comparisons also reported on some of this review's secondary outcomes but very low-certainty evidence means that we are unclear about the effects of the intervention on those outcomes.

AUTHORS' CONCLUSIONS

There is insufficient evidence to assess the effectiveness of physical interventions, or multiple methods of support (social, educational or physical) for supporting the initiation or continuation of breastfeeding in women who are overweight or obese. We found no RCTs comparing one type of support to another type of support. All of our GRADE assessments resulted in very low-certainty evidence, with downgrading decisions based on limitations in trial design (e.g. risk of attrition bias), imprecision, inconsistency. The available trials were mostly of variable quality with small numbers of participants, confounded by poor adherence within both the intervention and control groups.Well designed, adequately powered research is needed to answer questions about the social, educational, physical support, or any combination of these interventions that could potentially help mothers who are overweight or obese to achieve optimal breastfeeding outcomes. We need trials that examine interventions designed specifically for women who are overweight or obese, delivered by people with training about how to overcome some of the challenges these women face when establishing and maintaining breastfeeding. Particular attention could be given to the assessment of antenatal interventions aimed at improving breastfeeding initiation in women with a raised BMI, and not just focusing on recruiting women who have an intention to breastfeed. Given that the majority of current trials were undertaken in the USA, further trials in a diverse range of countries and settings are required. Future trials need to give consideration to the theoretical basis of the intervention using established frameworks to enable replicability by others and to better determine the components of effective interventions.