Prolonged breastfeeding for 24 months or more and mental health at 6 years of age: evidence from the 2004 Pelotas Birth Cohort Study, Brazil

Association of breastfeeding with mental disorders in mother and child: a systematic review and meta-analysis

BACKGROUND

Breastfeeding has long been associated with numerous benefits for both mothers and infants. While some observational studies have explored the relationship between breastfeeding and mental health outcomes in mothers and children, a systematic review of the available evidence is lacking. The purpose of this study is to systematically evaluate the association between breastfeeding and mental health disorders in mothers and children.

METHODS

We systematically searched MEDLINE and EMBASE from inception to June 2, 2023. The inclusion criteria consisted of all studies evaluating links between breastfeeding and development of mental health disorders in children and mothers. Risk of bias was assessed using the Newcastle-Ottawa Scale (NOS) while grading of Recommendations Assessment, Development and Evaluation (GRADE) was used to assess the certainty of evidence. A random-effects meta-analysis was used if possible, to estimate the odds ratio for the association between breastfeeding and mental health outcomes. The Mantel-Haenszel method was utilised for pooling ORs across studies. Study heterogeneity was assessed using the I2 statistic.

RESULTS

Our review identified twenty-one original study. Of these, 18 focused on the association between breastfeeding and child health, assessing depressive disorders, schizophrenia, anxiety disorders, eating disorders and borderline personality disorder. Three studies evaluated the associations between breastfeeding and maternal mental health disorders. Three studies looking at outcomes in children showed no significant association between breastfeeding and occurrence of schizophrenia later in life (OR 0.98; 95% CI 0.57-1.71; I2 = 29%). For depressive disorders (5 studies) and anxiety disorders (3 studies), we found conflicting evidence with some studies showing a small protective effect while others found no effect. The GRADE certainty for all these findings was very low due to multiple limitations. Three studies looking at association between breastfeeding and maternal mental health, were too heterogeneous to draw any firm conclusions.

CONCLUSIONS

We found limited evidence to support a protective association between breastfeeding and the development of mental health disorders in children later in life. The data regarding the association between breastfeeding and maternal mental health beyond the postnatal period is also limited. The methodological limitations of the published literature prevent definitive conclusions, and further research is needed to better understand the relationship between breastfeeding and mental health in mothers and children.

Population neuroscience: challenges and opportunities for psychiatric research in low- and middle-income countries

Objective:

Population neuroscience is an emerging field that combines epidemiology and neuroscience to study how genes and the environment shape typical and atypical brain functioning. The objective of this study was to review key studies on population neuroscience from low- and middle-income countries (LMICs) and to identify potential gaps vis-à-vis studies conducted in high-income countries.

Methods:

We conducted a systematic review to search for longitudinal cohort studies investigating the development of psychiatric disorders in children and adolescents in LMICs. We performed an electronic search in the EMBASE and MEDLINE databases from inception to July 5th, 2019.

Results:

We found six cohorts from four countries that met our search criteria: three cohorts from Brazil, one from China, one from South Africa, and one from Mauritius. Relevant examples of findings from these studies are reported.

Conclusion:

Our results demonstrate the impact of the valuable science output these cohort designs promote, allowing LMICs to have a share in frontline global psychiatry research. National and international funding agencies should invest in LMIC population neuroscience in order to promote replication and generalization of research from high-income countries.

Extended Breastfeeding in Poland: Knowledge of Health Care Providers and Attitudes on Breastfeeding Beyond Infancy

BACKGROUND

Extended breastfeeding is rare in Poland, and lack of acceptance and understanding is often evident in public opinion. The ability to provide reliable information about breastfeeding beyond infancy depends on health professionals' levels of knowledge and attitudes. They are considered by most parents in Poland to be authorities in the field of child nutrition.

RESEARCH AIMS

To determine (1) the level of knowledge and the attitudes of Polish health professionals towards extended breastfeeding; (2) the relationship between personal breastfeeding experience and attitudes towards extended breastfeeding; and (3) the relationship between knowledge about breastfeeding beyond twelve months and attitudes towards breastfeeding beyond infancy.

METHODS

A one-group prospective, cross-sectional, self-report style survey was used. The convenience sample ( N = 495) comprised gynaecologists, neonatologists and midwives. Data were collected via an online questionnaire and the results were analyzed with the use of descriptive statistics, a chi-square independence test, Fisher's exact test, post-hoc testing, and two-part tables using SPSS.

RESULTS

Most of the respondents (76.7%; n = 384) had a low level of knowledge about the benefits of breastfeeding beyond twelve months and even emphasized that this nutritional choice could have negative impacts. There was a positive correlation ( F = 105.847; p = < .01) between levels of knowledge and respondents' attitudes towards breastfeeding beyond infancy. Attitudes were also influenced by the length of time respondents had breastfed.

CONCLUSION

Healthcare providers have an insufficient level of knowledge about extended breastfeeding and need further education in this area.