Role of Breastfeeding in Mitigating Childhood Asthma

THE ROLE OF BREASTFEEDING IN MITIGATING CHILDHOOD ASTHMA: A COMPREHENSIVE NARRATIVE LITERATURE REVIEW

Name

Institution/Affiliation

Due Date

Table of Contents

STUDENT DECLARATION.. 2

Acknowledgements. 3

Table of Contents. 4

Abstract. 6

Chapter 1: INTRODUCTİON.. 7

1.1.1 Background. 7

Rationale. 9

Aim.. 10

Objectives. 10

2. Research Questions. 10

3. Significance of the Study. 11

Public Health Significance. 11

Identifying Preventive Interventions. 11

Contribution to Existing Knowledge. 11

Implications for Healthcare Practitioners and Policymakers. 11

4. 0 Ethical Considerations. 12

Chapter 2: Literature Review.. 13

2.1 Introduction. 13

2.2. Understanding Childhood Asthma. 14

2.3 Mechanisms of Breastfeeding in Asthma Prevention. 16

2.4 Duration and Exclusive Breastfeeding. 17

2.5 Literature Review Conclusion. 18

Chapter 3: Methodology. 19

Search Strategy. 19

Inclusion and Exclusion Criteria. 19

Data Extraction. 20

Sources of Information. 20

Screening and Selection Process. 20

Initial Identification of Potentially Relevant Articles. 20

Managing Duplicates. 20

Screening Titles and Abstracts. 20

Full-Text Review Process. 21

Chapter 4: Results. 22

Search Findings. 22

Critical Appraisal 22

Data Extraction. 24

Thematic Analysis. 26

Strengths and Limitations. 32

Implications for Future Research. 32

Chapter 6: Conclusion. 33

References. 34

Appendices. 40

Appendix 1: PICOS Search Strategy. 40

Appendix 2: Keywords / Alternative Terminology. 40

Appendix 3: Reflective Account. 41 

Abbreviations

List of Figures

PRISMA flow diagram for searches and study selection ........................................................

List of Appendices

PICOS Search Strategy ........................................................................................................

 PRISMA Checklist ....................................................................................................................

Abstract

Overview: This narrative literature review investigates the critical role of breastfeeding in mitigating childhood asthma. Our study aims to comprehensively examine existing research, elucidate the procedures employed, summarize key findings, and offer insights into the potential impact of breastfeeding on reducing the risk of childhood asthma.

Objective: Our research aimed to comprehensively explore the relationship between breastfeeding and childhood asthma, examining its duration, age-related effects, impact of supplemental feeding, and associations with adverse childhood experiences.

Methodology: Through a systematic review incorporating narrative literature analysis, we meticulously assessed 14 key studies, employing critical appraisal tools like NOS and AMSTAR 2 for quality evaluation. Thematic analysis further enriched our understanding, allowing for the identification of prominent themes across studies.

Results: The findings consistently supported a protective association between longer exclusive breastfeeding and reduced childhood asthma risk. Studies showcased varying degrees of protection, stronger effects in younger children, and the influence of exclusive versus partial breastfeeding on asthma outcomes. Additionally, associations weakened in the presence of adverse childhood experiences.

Discussion: Longer durations of exclusive breastfeeding emerged as a crucial factor in mitigating childhood asthma risk, aligning with WHO guidelines. Policy implications advocate for public health initiatives and healthcare interventions promoting and supporting exclusive breastfeeding for at least six months.

Conclusion: Our research underscores the critical role of breastfeeding in reducing childhood asthma risk, emphasizing the need for targeted public health campaigns and healthcare policies to encourage and enable exclusive breastfeeding practices for optimal child respiratory health. Further research is warranted to explore long-term impacts and mechanisms beyond early childhood, addressing remaining gaps in understanding this vital relationship.

Chapter 1: INTRODUCTİON

1.1.1 Background

Childhood asthma is a significant global health issue, affecting millions of children and their families (WHO, 2021). It is a chronic respiratory condition characterized by inflammation and constriction of the airways, resulting in recurrent symptoms such as wheezing, coughing, chest tightness, and shortness of breath. Asthma not only affects physical health but also has a substantial impact on a child's daily life, often limiting their participation in physical activities, sports, and social interactions due to the fear of triggering an asthma attack (Mammen, et al., 2019). This can lead to feelings of isolation and hinder their overall development.

Asthma can have significant other adverse effects on other aspects of their development and growth. For example, for kids with poor management of the condition are likely to have academic challenges stemming from missing school days and other academic challenges (Kopel, et al., 2018). Frequent visits to healthcare providers and hospitalizations can disrupt their education, affecting their academic performance and long-term prospects. Thus, living with asthma can take a toll on a child's psychological and emotional well-being. The constant worry about asthma symptoms and potential emergencies can lead to anxiety and depression in children (McQuaid, et al., 2018). Moreover, parents and caregivers may also experience stress and anxiety as they strive to manage their child's condition effectively.

The burden of childhood asthma extends to families as well. Parents often must take time off work to care for their asthmatic child. In some cases, they may be forced to leave the workforce or even relocate to meet the needs of the child. Cumulatively, these problems affect the family and more often than not they translate to financial challenges (Butz, et al., 2017). Parents may also experience emotional distress and guilt, feeling responsible for their child's health condition. Balancing the needs of the asthmatic child with those of other family members can be challenging.

Childhood asthma places a significant financial burden on healthcare systems. This includes not only the direct costs of medications, hospitalizations, and doctor visits but also the indirect costs associated with emergency room admissions and lost productivity (Chen, et al., 2020). Effective management of asthma can reduce these costs, making it imperative for healthcare systems to prioritize preventive care and education.

Additionally, asthma does not affect all children equally, and health disparities are a significant concern. This may exacerbate the health inequality, especially for minority groups. Minority and socioeconomically disadvantaged populations often experience higher asthma prevalence and worse outcomes due to factors such as limited access to healthcare, substandard housing conditions, and exposure to environmental triggers like pollution and allergens. Thus, asthma creates a multifaceted problem for not only the patient but also for their family, community and the government. Its pervasive effects coupled with the disparities it accentuates underscore the urgent need to find sustainable and comprehensive strategies towards preventive care. Research has shown that breastfeeding harbours immense potential towards preventing this condition and this paper aims to explore the literature on this avenue of asthma preventive care.

In conclusion, childhood asthma is a multifaceted health issue with wide-ranging effects on children, their families, and society as a whole. It impacts physical health, mental well-being, educational attainment, and healthcare systems. Addressing childhood asthma comprehensively requires a multi-pronged approach that includes effective management, prevention, research, and advocacy to enhance the quality of life for children living with asthma.

Breastfeeding

Breastfeeding, as a vital aspect of early infant nutrition, has garnered considerable attention for its potential role in the development and prevention of childhood asthma (Lodge, et al., 2015) (Dogaru, et al., 2012) (Kramer, et al., 2017). Numerous studies have explored the association between breastfeeding practices and the risk of childhood asthma, and they have remained inconclusive. Some studies suggest that breastfeeding may confer protective effects against the development of childhood asthma (Lodge, et al., 2015) (Oddy, 2018). Breast milk contains various immunological components, including secretory IgA antibodies and bioactive molecules, which bolster the infant's immune system and provide defence against respiratory infections and allergens (Oddy, 2018) (Greer & Sicherer, 2012). Breastfeeding is thought to enhance respiratory and immune maturation, potentially reducing the risk of asthma (Kramer, et al., 2017).

One area of focus is understanding the link between breastfeeding duration and the potential to develop asthma for kids under five years. The duration and timing of breastfeeding are critical factors in assessing its potential protective role. Longer durations of exclusive breastfeeding, especially beyond six months, have been associated with a reduced risk of childhood asthma (Lodge, et al., 2015) (Dogaru, et al., 2012). The protective effect of breastfeeding seems to be most pronounced during the first year of life, a period when the infant's immune system is particularly vulnerable to environmental influences (Kramer, et al., 2017).

However, it's important to note that the relationship between breastfeeding and asthma is not solely determined by breastfeeding practices. Genetic factors play a significant role in a child's susceptibility to asthma (Kramer, et al., 2017). The impact of breastfeeding on asthma risk may interact with genetic predispositions, making it essential to consider gene-environment interactions in asthma research (Vercelli, 2008) (Lockett, et al., 2010).

Mechanisms underlying the protective effect of breastfeeding on childhood asthma are not fully understood. It is believed that breast milk's immune-boosting properties, its influence on the gut microbiome, and the transfer of bioactive compounds all contribute to this effect (Greer & Sicherer, 2012) (Oddy, 2018). Breast milk promotes a balanced immune response, potentially reducing the likelihood of developing allergic sensitization and asthma (Lodge, et al., 2015).

It's important to acknowledge that the relationship between breastfeeding and asthma risk is complex and subject to confounding factors (Lodge, et al., 2015). While some studies report a protective association, others have found no significant effect. Factors such as maternal asthma, smoking during pregnancy, and exposure to environmental allergens can confound the relationship (Kramer, et al., 2017).

In conclusion, the role of breastfeeding in mitigating childhood asthma is a subject of ongoing research and debate. While evidence suggests that breastfeeding, especially when practised exclusively and for an extended duration, may provide some protection against childhood asthma, the relationship is influenced by various genetic and environmental factors. Further research is needed to better understand the degree to which all these factors are involved and to inform breastfeeding recommendations for asthma prevention.

Rationale

The rising prevalence of childhood asthma in the UK, despite significant advancements in its treatment and management, underscores the urgent need for further investigation (Piazza, et al., 2016) ( Asthma UK, 2019). Childhood asthma poses a substantial public health challenge, with increasing numbers of children experiencing its burdens on their health and well-being ( Asthma UK, 2019). Despite the development of effective therapies, the condition's prevalence continues to rise, affecting approximately 1 in 11 children in the UK (Piazza, et al., 2016) ( Asthma UK, 2019). This prevalence trend necessitates a deeper exploration of potential contributing factors.

Breastfeeding has emerged as a potential protective factor against the development of childhood asthma (Lodge, et al., 2015) (Kramer, et al., 2017) (Dogaru, et al., 2012). Breast milk is known to contain various immunological components that enhance an infant's immune system and provide defence against respiratory infections and allergens (Oddy, 2018) (Greer & Sicherer, 2012). However, the existing evidence regarding the relationship between breastfeeding and childhood asthma remains ambiguous, with conflicting findings across studies (Lodge, et al., 2015) (Oddy, 2018). Some research suggests that breastfeeding, especially when practised exclusively and for an extended duration, may reduce the risk of childhood asthma (Lodge, et al., 2015). Conversely, other studies have found no significant association or complex interactions with genetic and environmental factors (Kramer, et al., 2017).

Given the potential of breastfeeding to mitigate childhood asthma and the inconclusive nature of existing research, there is a critical need for further investigation. A comprehensive examination of the role of breastfeeding in childhood asthma development can provide valuable insights for healthcare practitioners, policymakers, and parents. Understanding the interplay between breastfeeding practices and asthma risk in the UK's context is essential for designing targeted interventions and strategies to combat the rising prevalence of this chronic condition among children.

Aim

The primary aim of this research proposal is to comprehensively investigate and analyze the relationship between breastfeeding practices and the development or prevention of childhood asthma. Through a narrative literature review, this research aims to provide a nuanced understanding of how breastfeeding may mitigate childhood asthma and contribute to the existing body of knowledge on this critical topic.

Objectives

To achieve this aim, the following specific research objectives will guide the narrative literature review:

1. To investigate the relationship between breastfeeding and the development of paediatric asthma.
2. Investigate the role of breastfeeding duration in mitigating the onset and frequency of pediatric asthma symptoms.
3. Evaluate the influence of exclusive breastfeeding on minimizing the likelihood and severity of pediatric asthma manifestations.
4. To assess the correlation between breastfeeding practices and the prevalence of childhood asthma in the United Kingdom
5. To investigate if there is evidence regarding the protective role of breastfeeding in preventing or mitigating childhood asthma
6. Evaluate how primary risk factors for childhood asthma interact with breastfeeding practices to understand their combined influence on asthma development.