Keywords
Responsive feeding, caregiver, infant, overweight, obesity, systematic review, protocol
This article is included in the Maternal and Child Health collection.
Responsive feeding, caregiver, infant, overweight, obesity, systematic review, protocol
Recent figures indicate that the number of children overweight under the age of five is estimated to be over 41 million1, leading to prevalence of overweight and obesity in infants and children being identified as a major public health issue2. Infancy is posited to be a sensitive period for the development of child overweight, particularly the first two years3,4. Childhood obesity can lead to immediate and long term health complications, including, obstructive sleep apnoea, high blood pressure and obesity related cardiovascular disease5. Children who are obese are more likely to be obese in adulthood, therefore exposing themselves to a higher risk of many chronic diseases6. Parental feeding practices and styles (as outlined in Table 1) are a crucial determinant in the aetiology of childhood obesity7, with responsive feeding (both bottle and breast feeding) identified as having a protective effect against child overweight and obesity, and an associated reduced risk of overweight and obesity8,9.
Parental feeding styles example | Definition |
---|---|
Instrumental feeding | Using food as a reward for a desired outcome (i.e. a positive behaviour). This may strengthen the preference for that food (often high calorie)11. |
Pressuring to eat | Prompting to eat more food; the caregiver is concerned with increasing the child’s food intake (such as adding cereal to a child’s bottle to increase intake)27. |
Monitoring food intake | Monitoring a child’s food intake; may be expected to result in a lower BMI, however research has often identified no weight change28. |
Responsive feeding | Responding promptly and in a developmentally appropriate manner to infant cues of satiety and hunger3. |
Food restriction | Minimising access to food to reduce child’s weight. This can result in the opposite effect by causing the child to seek out the restricted food11. |
Responsiveness is a reciprocal dimension of feeding in which an infant or young child provides clear feeding cues, such as hunger and satiety, and the caregiver responds in a prompt and developmentally appropriate manner3. Responsive feeding can relate to early consumption of breast and/or formula milk, as well as in relation to introducing and establishing solid food consumption. From a very young age infants have the ability to self-regulate their food intake10 but the volume of food an infant consumes depends on their caregiver’s ability to recognise and respond appropriately to their infant’s hunger and satiety cues, as well as this ability to self-regulate their intake. Non-responsive feeding may occur between an infant and caregiver when a caregiver misinterprets or misunderstands the infant’s hunger and satiety cues, and so responds by offering a developmentally inappropriate amount, type or texture of food. Non-responsive feeding may include, instrumental feeding, pressuring a child to eat, and controlling food intake, which have all been associated with childhood overweight and obesity11–13. Non-responsive feeding can be conceptualised as being at the opposite end of the spectrum to responsive feeding and research suggests it has a role in childhood weight gain and overweight3. For example, caregivers who have an inability to recognise an infant’s weight is within a healthy range, often utilise non-responsive feeding styles such as food restriction, or pressuring-to eat14. These feeding styles have been associated with children developing unhealthy eating styles (such as emotional eating and eating in the absence of hunger), leading to an increased risk of obesity15.
Multiple factors may affect how caregivers engage in feeding behaviours. A recent qualitative review of parental experiences of infant feeding highlighted that some of these factors are environmentally based (including socio-economic status, sources and consistency of information about infant feeding16). Additional factors include psychological factors (such as maternal mental health17 and maternal executive functioning18), and social factors (including, interpersonal relationships, marital status, occupation, and the influence of family and friends)16. Parental knowledge, beliefs, and prior experience also influence their feeding practices and styles16. Although sources such as the WHO UNICEF Baby Friendly Initiative (BFI) exist to provide guidance on improving caregivers’ knowledge about responsive feeding19,20, parents still report uncertainty about how ‘best’ to feed their infants16. It is also suggested that healthcare professionals have not been equipped appropriately to assist caregivers in responsive feeding21. In order to improve information and support for caregivers it is necessary to examine the barriers and enablers to responsive feeding. Understanding the underlying factors that influence responsive feeding will contribute to the development of a caregiver-focused supports that supports responsive feeding. Systematic reviews have reported that healthcare professionals providing responsive feeding guidance to mothers on identifying and responding to children’s satiety and hunger cues can lead to healthy weight status/gain in early childhood10,22–25.
Of central importance to improving and supporting appropriate responsive feeding behaviours is the fact that some determinants of this behaviour are modifiable, such as caregiver knowledge, and may be specifically targeted through interventions. Models of behaviour change are fundamental to informing such interventions and strategies to promote positive public health26. The COM-B (capability, opportunity, motivation and behaviour) model for example provides a framework for understanding behaviour change, and incorporates ‘capability’, ‘opportunity’, and ‘motivation’ are conceptualised as the three conditions necessary for behavioural change26. Utilising the COM-B model to map barriers and enablers of responsive feeding behaviours provides a useful and tangible first step towards development of interventions and supports to assist primary caregivers to engage in responsive feeding behaviours that are associated with reduced risk of childhood obesity.
This study has been registered with the international Prospective Register of Systematic Reviews on 6th August 2019 (PROSPERO; registration number, CRD42019144570).
A step-by-step flow diagram will be used in accordance with the Preferred Reporting Items for Systematic review and Meta-analysis protocol (PRISMA-P) guidelines, to demonstrate the study selection process, and rationale will be provided for excluded studies. The entirety of the review will follow the PRISMA-P checklist.
Ethical approval is not required for this review as no experimental or observational research will be carried out, and no identifying personal information will be present or collected.
This review will examine both qualitative and quantitative primary studies that have examined factors associated with caregiver responsive and nonresponsive feeding of children up to 2 years old. All studies collecting primary data, or analysing primary data through secondary analyse will be included. Quantitative research such as, randomised control trials, case-control studies, retrospective and prospective cohort studies, cross-sectional and longitudinal studies will be included. In addition, qualitative studies, including research conducted as part of the process evaluation of an intervention trial, will be included. A broad remit of studies will be included in order to ensure factors that emerge in a variety of contexts and settings are identified. The studies must be published in English due to limitations in translation resources, and there will be no restriction on publication date.
Primary caregivers (parents, guardians) of healthy children ≤ 2 years old. Studies of infants with medical conditions affecting feeding and growth, very preterm infants <32 weeks gestation, low birth weight (VLBW) <2500 g29, and those who have been fed via a naso-gastric tube will be excluded from this review. We will also exclude studies including infants with major sensory and physical disabilities (e.g. blindness, deafness) because of the additional challenges that caregivers of these infants may find implementing responsive feeding in early life. To ensure the findings can contribute to the development of an intervention to reduce the risk of childhood overweight in a UK and Ireland-relevant population, studies conducted in countries where responsive feeding is used to improve weight gain in malnourished infants will be excluded. Studies will only be included if they are carried out in an economically developed country (as indicated by membership of the Organisation for Economic Co-operation and Development (OECD))30.
The exposures of interest are the barriers and enablers associated with primary caregiver feeding responsiveness and non-responsiveness. Examples of non-responsive feeding include, pressuring a child to eat, instrumental feeding, and controlling food intake which have all been associated with childhood overweight and obesity11–13.
To be included, studies need to report a factor that could be a barrier or enabler to responsive feeding, for example an intervention that includes anticipatory guidance. Responsive feeding during first 2 years of life as reported by the study authors. This will include outcomes measured using established scales, e.g. Child Feeding Questionnaire31, and qualitative data in relation to caregiver feeding practices (such as, ensuring feeding context with few distractions)32. Results from quantitative studies (for example, p-values, odds ratios, and confidence intervals) will be used to determine the existence and strength of associations between factors and feeding, whilst results from the qualitative studies (such as themes) will be synthesised to narratively explore barriers and enablers experienced by caregivers to responsive feeding.
The following databases will be searched: CINAHL, Cochrane Library, Medline, Embase, PubMed, PsycINFO, Maternity and Infant Care database. All databases will be searched from inception. All databases will be searched using the comprehensive search strategy outlined below.
The searches will be based on concepts associated with infant feeding behaviours to include proxy terms for responsive and non-responsive feeding and any barriers or enablers to primary caregiver engagement. We will use the following search strategy:
Feeding type concept: authoritarian OR authoritative OR bottle feeding OR breastfeeding OR breast feeding OR breast-feeding OR complementary feeding OR controlled feeding OR controlling feeding OR emotional feeding OR formula feeding OR non-responsive* OR pressured OR restricted feeding OR restricting feeding OR responsive* OR self-feeding OR unresponsive* OR weaning
Influencing factors concept: barrier* OR belief* OR challenge* OR determinant* OR enabler* OR experiences OR facilitator* OR facto* OR influenc* OR obstacle* OR parenting style* OR risk OR risk factors OR view*
Subject concept: babies OR baby OR child OR infant* OR maternal OR mother* OR neonat* OR newborn* OR parent* OR paediatric OR pediatric OR toddler*
Study design concept: cohort OR cross-sectional OR experiment* OR intervention OR interview OR observation* OR process evaluation OR qualitative.
One researcher (VS) will independently screen titles and abstracts of all identified papers against eligibility criteria. Two other researchers (JR, SR) will each screen titles and abstracts of half of the identified papers. At least two members of the researcher team (VS, JR, KM, EO, SR) will then independently screen full texts of potentially eligible articles for inclusion. Any discrepancies will be resolved by discussion or recourse to a third reviewer from the team (VS, JR, KM, EO, SR). If necessary, the reviewers will attempt to contact authors of original articles to request missing information or for clarification. All references will be imported into EndNote and duplicates will be removed through EndNote and through manual screening.
Raw data from qualitative studies will be extracted onto an Excel spreadsheet and qualitative and quantitative data will be extracted using pre-determined standardised data extraction forms (see extended data33,34).
For the qualitative data extraction one researcher (SR) will extract the study participant, setting and design details of each paper and another researcher (JR) will download any qualitative data from each study to word files. Qualitative data will include the quotes, interpretative text and any other supplementary data. Two researchers (JR, SR) will each examine the qualitative data from three of the included papers and code the data relevant to barriers and enablers to responsive feeding to the COM-B framework. The researchers will meet to compare their interpretation of the data and coding, and any discrepancies will be discussed and resolved.
The quantitative data will be extracted independently by two reviewers (KM, EO), with one researcher (VS) extracting data from all quantitative studies, whilst two more researchers (KM, EO) will each extract data from half of the identified studies. The general study details (including author, title, date) will be extracted along with more specific details such as participant information, infant weight, and intervention details. Results of the study will be recorded (such as, confidence intervals, p-values, and standard deviations). Identified determinants and association factors identified in quantitative studies will be mapped onto the COM-B model, and will be synthesised with consideration given to the context of the strength of associations and effects. Researchers (VS, KM, EO) will meet to discuss findings of the data extraction and resolve any discrepancies.
Two reviewers (VS, SR) will independently assess the methodological quality of these studies using the Mixed Methods Appraisal Tool (MMAT)35; any discrepancies will be resolved through consensus discussion or recourse to a third member of the research team (JR, KM, EO). MMAT provides two screening questionnaires, which are used in the appraisal stage of mixed methods systematic reviews. The MMAT is used to appraise five study types: randomised control trials, non-randomised studies, quantitative studies, qualitative research, and mixed methods design studies.
We will use narrative text along with tables of the findings from the included studies, structured around: 1) the relation of barriers and enablers to responsive feeding and non-responsive feeding, and 2) the existence and strength of association between factors and responsive and/or non-responsive feeding outcomes. Depending on the heterogeneity of quantitative studies identified, a meta-analysis will be conducted.
To synthesise the extracted qualitative data, we will use a ‘best fit’ framework synthesis, as outlined by Booth and Carroll36. Framework synthesis is a structured approach in which data are analysed using concepts or themes specified a priori37,38. The ‘best fit’ approach follows seven distinct steps, which includes incorporation of inductively emerging themes with pre-specified themes within the a priori framework. This allows for a flexible and rigorous approach to qualitative evidence synthesis39. It provides a pragmatic approach to providing context-specific information and understanding of parents’ experiences of, and barriers and facilitators to responsive feeding. The framework to be used is the Capability, Opportunity, and Motivation Model of Behaviour (COM-B model)27, and findings will be mapped onto this model.
Participant quotations and authors’ interpretations in the results sections of included papers will be coded using the a priori COM-B framework. An inductive thematic analysis of the data will also be conducted and additional themes, which are not accounted for by the COM-B model, will be added to the coding framework. Concepts from the COM-B framework and inductive thematic analysis will then be revisited and synthesised into a final set of themes.
Quantitative data will be extracted onto the COM-B model, with evidence of each barrier and enabler to responsive feeding. All stages of analysis will be conducted by one researcher (VS) and will be reviewed and discussed by all members of the study team to reach consensus on the final evidence synthesis.
Subgroup analysis will be determined and led by the data, but may include high/low income, mothers/fathers, primi/multiparous mothers.
The aim of this systematic review is to analyse the scientific literature exploring and reporting on barriers and enablers to responsive feeding. The findings will inform researchers, health professionals and caregivers about the ways in which responsive feeding during infancy might be promoted, supported and improved. This could include identification of the groups of caregivers who find responsive feeding more challenging and a clear understanding of the behavioural components which may make this difficult. This should inform the co-production of specific education and support packages for both health professionals and caregivers.
Evidence around the barriers and enablers associated with responsive feeding will also enable researchers to inform health professional communities and to develop and/or adapt any existing interventions. This has the potential to contribute to reduce inappropriate feeding and could be particularly important in the prevention of childhood obesity. It is anticipated that the findings may also inform intervention development in ensuring that barriers to responsive feeding are tackled. In regards to intervention development and improvement, it is important that where it is not possible to modify a particular determinant (for example, maternal executive functioning, or infant temperament) the intervention may be adapted to suit the caregivers specific needs.
This review will only include studies which are published in English, due to limitations in translation resources. This could mean excluding other relevant information based on language barriers. Secondly, unpublished literature will not be included, possibly leaning towards an increased risk of publication bias in the research that is included.
If we need to make any amendments to this protocol, we will give the date of each amendment, describe the change and provide rationale in this section.
Figshare: CRiB Quantitative Data Extraction Form. https://doi.org/10.25411/aru.11498637.v140
This project contains the following extended data:
Figshare: CRiB Qualitative Data Extraction Form. https://doi.org/10.25411/aru.11498667.v133
This project contains the following extended data:
Repository: PRISMA-P checklist for ‘Barriers and enablers to Caregivers Responsive feeding Behaviour (CRiB): A mixed method systematic review protocol’. https://doi.org/10.25411/aru.11378844.v234
Data are available under the terms of the Creative Commons Zero "No rights reserved" data waiver (CC0 1.0 Public domain dedication).
Is the rationale for, and objectives of, the study clearly described?
Yes
Is the study design appropriate for the research question?
Yes
Are sufficient details of the methods provided to allow replication by others?
Yes
Are the datasets clearly presented in a useable and accessible format?
Not applicable
Competing Interests: No competing interests were disclosed.
Reviewer Expertise: Parent feeding practices, child temperament, infant and child feeding, childhood obesity.
Is the rationale for, and objectives of, the study clearly described?
Yes
Is the study design appropriate for the research question?
Yes
Are sufficient details of the methods provided to allow replication by others?
Yes
Are the datasets clearly presented in a useable and accessible format?
Not applicable
Competing Interests: No competing interests were disclosed.
Reviewer Expertise: Childhood obesity prevention, parent-child interactions, parent-child feeding interactions, child attachment, maternal and child obesity prevention in early parenting years, observational measures for assessing parent-child feeding interactions.
Alongside their report, reviewers assign a status to the article:
Invited Reviewers | ||
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Version 1 16 Jan 20 |
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