Effectiveness of a community-based support programme to reduce social inequality in exclusive breastfeeding: study protocol for a cluster-randomised trial

Trends in social inequality in breastfeeding duration in Denmark 2002-2019

AIMS

The aim of the present study was to analyse trends in full breastfeeding for at least 4 months across socioeconomic position in Denmark over a 17-year-long period from 2002 to 2019 using parental education as the indicator of socioeconomic position.

METHODS

The study used data on full breastfeeding collected between 2002 and 2019 by community health nurses in the collaboration Child Health Database, n=143,075. Data were linked with five categories of parental education from population registers. Social inequality was calculated as both the relative (odds ratio) and absolute social inequality (slope index of inequality). A trend test was conducted to assess changes in social inequality over time.

RESULTS

A social gradient in full breastfeeding was found for the entire study period. The odds ratio for not being fully breastfed for at least 4 months ranged from 3.30 (95% confidence interval 2.83-3.84) to 5.09 (95% confidence interval 4.28-6.06) during the study period for infants of parents with the lowest level of education (primary school) compared with infants of parents with the highest level of education (5+ years of university education). The slope index of inequality was between -38.86 and -48.81 during the entire study period, P=0.80. This indicated that both the relative and absolute social inequality in full breastfeeding to at least 4 months of age was unchanged in the study period from 2002 to 2019.

CONCLUSIONS

This study showed a persistent relative and absolute social inequality in full breastfeeding for at least 4 months from 2002 to 2019 in Denmark.

Establishing trust through home visits during pregnancy: a realist evaluation of a Danish breastfeeding support intervention

BACKGROUND

Breastfeeding has numerous health benefits but social inequality in breastfeeding is documented in many high-income countries. The evidence for improving breastfeeding support through prenatal encounters is conflicting, but points towards a mechanism activated through a positive relationship between the families and their health care providers. A Danish intervention included a home visit by a health visitor during pregnancy to prolong breastfeeding and reduce social inequality in its rates. The purpose of this study was to investigate how this home visit affected breastfeeding support across socioeconomic groups with attention to how, and for whom, it activated a mechanism of improved relationship and trust between the health visitor and the family.

METHODS

Our study used a realist evaluation approach and was embedded in a cluster randomized trial carried out in 20 municipalities. In the intervention arm, we observed 35 home visits delivered by the health visitors, interviewed 16 mothers and conducted 6 focus groups with a total of 34 health visitors to examine the intervention mechanisms and contextual factors that influence the generation of outcomes. The analysis applied Luhmann's, and Brown and Meyers' concepts of trust as middle-range theories.

RESULTS

The pregnancy home visit helped early establishment of trust which enhanced the subsequent breastfeeding support postpartum in numerous ways. In realist terms, our central mechanism of change, the establishment of trust, had optimal conditions for success in the contextual setting of the pregnancy home visit where there was time, peace, undisturbed conversations, mental capacity to reflection, and a perceived more even power balance between the family and the health visitor which resulted in a range of positive outcomes. The mechanism resulted in improved tailored breastfeeding support postpartum, families reaching out to the health visitor sooner when experiencing breastfeeding difficulties, and families expressing a more positive experience of breastfeeding. The mechanism was activated across the different socioeconomic groups.

CONCLUSIONS

The circumstances of the pregnancy home visit helped to establish trust between the health visitor and the family. Especially for families in vulnerable positions, the pregnancy home visit seems to be a potent driver for enhancing the gains from breastfeeding support.

Process evaluation of a breastfeeding support intervention to promote exclusive breastfeeding and reduce social inequity: a mixed-methods study in a cluster-randomised trial

BACKGROUND

Breastfeeding is a powerful public health intervention that produces long-term health benefits. However, in high-income countries such as Denmark, breastfeeding rates are suboptimal and unequally distributed across socio-economic positions. The 'Breastfeeding - a good start together' intervention, to promote longer duration of exclusive breastfeeding and reduce social inequity, was implemented in a cluster-randomised trial during 2022-2023 across 21 municipalities in two Danish regions. A process evaluation was conducted to assess the implementation, mechanisms of impact, and possible contextual factors affecting the intervention.

METHODS

The study was guided by the Medical Research Council's guidance for conducting process evaluations and employed a mixed-methods approach in a convergence design. Quantitative data: contextual mapping survey (n = 20), health visitor survey (n = 284), health visitor records from 20 clusters and intervention website statistics. Qualitative data: dialogue meetings (n = 7), focus groups (n = 3) and interviews (n = 8).

RESULTS

Overall, the intervention was delivered as planned to intended recipients, with few exceptions. Health visitors responded positively to the intervention, noting that it fitted well within their usual practice and enhanced families' chances of breastfeeding. Mothers expressed having received the intervention with few exceptions, and reacted positively to the intervention. Although health visitors were concerned about the potential stigmatisation of mothers receiving the intensified intervention, none of the interviewed mothers felt stigmatised. Contextual factors impacting the intervention implementation and mechanisms included staff and management turnover, project infrastructure and mothers' context, such as resources, social networks and previous experiences. The overall fidelity of the intervention delivery was high.

CONCLUSIONS

Health visitors and families responded well to the intervention. Interventions aimed at enabling health care providers to deliver simplified and structured breastfeeding support, in alignment with support provided in other sectors of the health care system, may increase breastfeeding rates and reduce social inequity in breastfeeding, even in international contexts.

TRIAL REGISTRATION

Clinical Trials: NCT05311631. First posted April 5, 2022.

Development of a complex intervention to strengthen municipality-based breastfeeding support to reduced social inequity in breastfeeding

BACKGROUND

Breastfeeding is the ideal nutrition for infants and protects infants and mothers from a range of adverse health outcomes during their lifespan. In Denmark, while the breastfeeding initiation rate is high, only 14% of mothers meet the World Health Organization's recommendation of exclusive breastfeeding at six months. Furthermore, a notable social inequity exists among those who achieve this recommendation. Knowledge of effective interventions to reduce breastfeeding inequity is limited. A previous hospital-based intervention succeeded in increasing breastfeeding duration. However, most breastfeeding support is provided in Danish municipalities by health visitors. This called for adapting the intervention to the health visiting program and developing an intensified intervention addressing the social inequity in breastfeeding. This article describes the adaptation and development process of a municipality-based intervention.

METHODS

During a 15-month period in 2020-21, the municipal intervention was iteratively developed using a three-stage framework for developing complex health interventions described by Hawkins et al. The three stages were 1) need assessment and stakeholder consultation, 2) co-production and 3) prototyping. The process was inspired by O'Cathain et al.'s principles for a user-centred, co-created and theory- and evidence-based approach, involving parents and health visitors.

RESULTS

In stage 1, we identified the needs and priorities of the target groups of the intervention. In stage 2, the intervention was developed through action research design and inspired by Duus' 'learning cycles' as the method to enhance motivation and ownership and to strengthen the implementation process by creating a joint room for learning and reflection with health visitors and developers. In stage 3, the intervention was tested for feasibility and usefulness during a 2.5-month period accompanied by monthly dialogue meetings with health visitors and developers. In this period, the intervention was refined based on the gathered experiences and was subsequently prepared for evaluation.

CONCLUSION

The description of the development of this complex intervention, aimed at increasing breastfeeding duration and reducing inequity, offers breastfeeding practitioners and researchers a transparent foundation for continuously improving breastfeeding support and a methodology for complex intervention development.

TRIAL REGISTRATION

Registered at Clinical Trials NCT05311631.

Strengthening health visitors' breastfeeding support: Results from a cluster randomised study

AIMS

To assess the effect of the education programme on three constructs of health visitors' breastfeeding support: knowledge, self-efficacy and action competence. Furthermore, the study aimed to confirm the factor structure of these three constructs.

BACKGROUND

Health professionals are key in supporting breastfeeding women but studies report gaps in health professionals' breastfeeding support knowledge and competences. The present intervention study aimed to strengthen the breastfeeding support of families to improve breastfeeding rates. Health visitors received an interactive education programme to enhance their breastfeeding support knowledge, self-efficacy and action competence, including e-learning and a two-day course of lectures, role plays and discussions.

DESIGN

A pre- and post-test study was applied in a cluster randomised trial METHODS: Cluster units were Danish municipal health visiting programmes, randomised by stratifying for region and annual births per cluster. Health visitors from 21 clusters (11 intervention, 10 control) participated. The knowledge, self-efficacy and action competence were assessed in self-reported questionnaires before and after education (n=368; intervention n=176, control n=196). To analyse the effects, the intention-to-treat principle and linear mixed models were applied. Confirmatory Factor Analysis was used to confirm the factor structures of the hypothesised knowledge, self-efficacy and action competence constructs.

RESULTS

158 health visitors in the control arm and 157 in the intervention arm completed the baseline questionnaire and were analysed in intention-to-treat analyses. 125 and 116, respectively, completed the follow-up questionnaire and were analysed in sensitivity analyses. Health visitors in both trial arms had high levels of self-efficacy and action competence at baseline. Mean treatment effect of the education programme was 0.5 points (CI95 % 0.1-0.8) for knowledge, 2.4 points (CI95 % 1.6-3.3) for self-efficacy and 1.4 points (CI95 % 0.7-2.0) for action competence. The factor structure of the items used to measure knowledge, self-efficacy and action competence were confirmed.

CONCLUSIONS

The education programme improved the self-reported breastfeeding support knowledge, self-efficacy and action competence of health visitors. The factor structures of the instruments used to measure effects were confirmed by confirmatory factor analysis.

TRIAL REGISTRATION

Clinical Trials: NCT05311631. First posted April 5, 2022.

Parental smoking in the first two years of a child's life and its associations with breastfeeding

BACKGROUND

Exclusive breastfeeding for the first 6 months followed by ongoing breastfeeding to 12 months and beyond is associated with multiple benefits for both mother and child. Maternal smoking is associated with a reduction in breastfeeding. Little is known about the effect of partner smoking on breastfeeding.

AIMS

This study explores the smoking behaviour of mothers and their partners in the first two years of a child's life and its associations with breastfeeding practice.

MATERIALS AND METHODS

We performed a secondary data analysis using survey data on 1155 mothers from their third trimester of pregnancy and at six, 12 and 24 months after delivery. Survey questions included smoking status of both mother and partner and breastfeeding intention and practice. Logistic regression models were conducted at each time point.

FINDINGS

Where the mother or both parents smoke, babies were less likely to be breastfed at six months of age (adjusted odds ratio (aOR) 0.29, 95% CI: 0.13-0.66) compared with families where neither parent smoked. Non-smoking mothers with smoking partners were less likely to intend to breastfeed (aOR 0.29, 95% CI: 0.11-0.82) and their babies were less likely to be breastfed at six and 12 months of age (aOR 0.64, 95% CI: 0.42-0.98 and 0.64, 95% CI: 0.43-0.95 respectively). There was no difference in breastfeeding behaviour between smoking and non-smoking parents at 24 months.

CONCLUSION

Smoking parents are less likely to breastfeed their babies at ages six and 12 months. Breastfeeding promotion should target both smoking mothers and smoking partners.