Never‐breastfed children face a higher risk of suboptimal cognition at 2 years of corrected age: A multinational cohort of very preterm children

Direct breastfeeding: Predictive factors and possible effects on neurodevelopment in very preterm infants

BACKGROUND

the importance of sucking milk directly at the mother's breast is often underestimated and many aspects of direct breastfeeding of very preterm infants are not investigated.

AIM

The primary endpoint of the study was to identify maternal and infant clinical predictors of direct breastfeeding in a cohort of infants born at <32 weeks of gestation or weighing <1500 g. The secondary endpoint was to evaluate the possible effects of direct breastfeeding on infant neurodevelopment.

STUDY DESIGN

Seventy-two infants born between July 2018 and December 2019 were divided into the subgroup that were directly breastfed (n = 42) and not directly breastfed (n = 30) at discharge. Maternal and infant characteristics were compared, and differences were analysed.

RESULTS

Logistic regression analysis demonstrated that the percentage of maternal milk taken during hospitalization, maternal age, and weight (z-score) at discharge were positively correlated with the likelihood of direct breastfeeding at discharge. Direct breastfeeding was not correlated with the cognitive score at 24 months corrected age.

CONCLUSIONS

Direct breastfeeding at discharge is more probable in infants of older mothers who receive more breastmilk and who experience greater weight gain. Direct breastfeeding is not correlated with the cognitive score at 24 months corrected age.

Role of breastfeeding in disease prevention

Human milk provides the infant with many bioactive factors, including immunomodulating components, antimicrobials and prebiotics, which modulate the infant microbiome and immune system maturation. As a result, breastfeeding can impact infant health from infancy, through adolescence, and into adulthood. From protecting the infant from infections, to reducing the risk of obesity, type 1 diabetes and childhood leukaemia, many positive health outcomes are observed in infants receiving breastmilk. For the mother, breastfeeding protects against postpartum bleeding and depression, increases weight loss, and long-term lowers the risk of type 2 diabetes, breast and ovarian cancer, and cardiovascular diseases. Beyond infants and mothers, the wider society is also impacted because of avoidable costs relating to morbidity and mortality derived from a lack of human milk exposure. In this review, Medline was used to search for relevant articles to discuss the health benefits of breastfeeding and its societal impact before exploring future recommendations to enhance our understanding of the mechanisms behind breastfeeding's positive effects and promote breastfeeding on a global scale.

A structured programme to promote breastfeeding improved the rates in very preterm infants at discharge

AIM

We developed the Promotion of Breastfeeding (PROBREAST) programme and evaluated what effect it had on the breastfeeding rate in infants born at less than 32 weeks of gestation or weighing ≤1500 grams.

METHODS

We compared the breastfeeding rate in two cohorts of patients who were born before (n = 72; January 2017 to June 2018) and after (n = 80; July 2018 to December 2019) the application of the programme. Moreover, we compared the correlation between type of feeding at discharge and post-discharge breastfeeding rate, between exclusive breastfeeding, postnatal growth and neurodevelopment.

RESULTS

Infants in the PROBREAST group had an exclusive breastfeeding rate at discharge higher (42 vs. 16%, p < 0.001) than that in the historical control group. Exclusive breastfeeding was negatively correlated with weight z-score at discharge, but not at 12 and 24 months corrected age, and was positively correlated with cognitive score at 24 months corrected age.

CONCLUSION

The application of a structured programme for the promotion of breastfeeding improved the breastfeeding rate in very preterm infants. We demonstrated that exclusive breastfeeding at discharge improved their neurodevelopment without impairing growth.

Where does the time go? Temporal patterns of pumping behaviors in mothers of very preterm infants vary by sociodemographic and clinical factors

Background

Mothers of very preterm (<32 weeks gestational age [GA]) infants are breast pump dependent and have shorter duration of milk provision than mothers of term infants. The opportunity (i.e., time) cost of pumping and transporting mother's own milk (MOM) from home to the NICU may be a barrier. There is a paucity of data regarding how much time mothers actually spend pumping.

Objective

To investigate the variation in pumping behavior by postpartum week, maternal characteristics, and infant GA.

Methods

Prospectively collected pump log data from mothers enrolled in ReDiMOM (Reducing Disparity in Mother's Own Milk) randomized, controlled trial included pumping date and start time and end time of each pumping session for the first 10 weeks postpartum or until the infant was discharged from the NICU, whichever occurred first. Outcomes included number of daily pumping sessions, number of minutes spent pumping per day, and pumping behaviors during 24-h periods, aggregated to the postpartum week. Medians (interquartile ranges) were used to describe outcomes overall, and by maternal characteristics and infant GA.

Results

Data included 13,994 pump sessions from 75 mothers. Maternal characteristics included 55% Black, 35% Hispanic, and 11% White and 44% <30 years old. The majority (56%) of infants were born at GA 28-31 weeks. Mothers pumped an average of less than 4 times per day, peaking in postpartum week 2. After accounting for mothers who stopped pumping, there was a gradual decrease in daily pumping minutes between postpartum weeks 2 (89 min) and 10 (46 min). Black mothers pumped fewer times daily than non-Black mothers after the first 2 weeks postpartum.

Conclusion

On average mothers pumped less intensively than the minimum recommendation of 8 times and 100 min per day. However, these pumping behaviors represent significant maternal opportunity costs that should be valued by the institution and society at large.

Evaluation of neurodevelopmental impairments and risk factors in children following cardiac surgery: The first cohort from China

Objective

Neurodevelopmental impairment has been realized as the most common complication in children with congenital heart disease undergoing cardiac surgery during the past 30 years. But little attention has been paid to this problem in China. The potential risk factors for adverse outcomes include demographic, perioperative, and socioeconomic factors, which are vastly different in China compared with the developed countries in previous reports.

Methods

Four hundred twenty-six patients (aged 35.9 ± 18.6 months) at about 1- to 3-year follow-up after cardiac surgery were prospectively enrolled from March 2019 to February 2022. Griffiths Mental Development Scales-Chinese was used to evaluate the quotients of overall development and 5 subscales of the child's locomotor, language, personal-social, eye-hand coordination, and performance skills. Demographic, perioperative, socioeconomic, and feeding type during the first year of life (breastfeeding, mixed, or never breastfeeding) were examined to identify the risk factors for adverse neurodevelopmental outcomes.

Results

Mean scores were 90.0 ± 15.5 for development quotient, 92.3 ± 19.4 for locomotor, 89.6 ± 19.2 for personal-social, 85.5 ± 21.7 for language, 90.3 ± 17.2 for eye-hand coordination, and 92 ± 17.1 for performance subscales. For the entire cohort, the impairment in at least 1 subscale was found in 76.1% of the cohort (>1 SD below population mean) with 50.1% being severe (>2 SDs below the mean). The significant risk factors included prolonged hospital stay, peak level of postoperative C-reactive protein, socioeconomic status, and never breastfeeding or mixed feeding.

Conclusions

Neurodevelopmental impairment is substantial in terms of incidence and severity in children with congenital heart disease undergoing cardiac surgery in China. Risk factors contributing to the adverse outcomes included prolonged hospital stay, early postoperative inflammatory response, socioeconomic status, and never breastfeeding or mixed feeding. There is an urgent need for standardized follow-up and neurodevelopmental assessment in this special group of children in China.

Regulation of Gut Microbiota through Breast Milk Feeding Benefits Language and Cognitive Development of Preterm Toddlers

Feeding practice is essential to growth and development of preterm toddlers. However, the relationship of feeding mode with gut microbiota and neurodevelopment outcomes of preterm toddlers has not been characterized fully. We conducted this cohort study to assess neurodevelopment outcomes and gut microbiota community structures of preterm toddlers who received either breast milk, formula or mixed feeding. Fifty-five preterm toddlers born <37 weeks and 24 term toddlers were recruited in the study. Bayley III mental and physical index scores were measured among preterm toddlers at 12 ± 2 and 18 ± 2 months corrected age (CA). Gut microbiome composition was analyzed by 16S rRNA gene sequencing in fecal samples collected from all participants at 12 months, 16 months and 20 months after birth. We found exclusive breast milk feeding for over three months in the first six months after birth was associated with significant increase in language composite score at 12 months CA (86 (79,97) vs. 77 (71.75,79), p = 0.008) and both language (106.05 ± 14.68 vs. 90.58 ± 12.25, p = 0.000) and cognitive composite score at 18 months CA (107.17 ± 10.85 vs. 99.00 ± 9.24, p = 0.007). The alpha diversity, beta diversity and composition of gut microbiota from those breastfed preterm toddlers not only resembled healthy term toddlers but also followed similar structure of preterm toddlers with enhanced language and cognitive performance. Our results suggest exclusive breast milk feeding for over three months in preterm toddlers leads to optimal cognitive and language development and well-balanced microbiota.