Trends of breastfeeding indicators in Brazil from 1996 to 2019 and the gaps to achieve the WHO/UNICEF 2030 targets

Patterns of complementary feeding introduction and associated factors in a cohort of Brazilian infants

BACKGROUND

Understanding the timing of food introduction in infants is essential for promoting optimal complementary feeding practices. However, existing studies often rely on cross-sectional data, limiting the ability to capture age-specific patterns. We aimed to describe food introduction during the first year of life by identifying patterns related to age at food introduction and associated factors in a cohort of Brazilian infants.

METHODS

Data were collected through standardized questionnaires administered to mothers via face-to-face interviews during the infant's first month of life and at 3, 6, 9, and 12 months of age. Additionally, two telephone interviews were conducted at 2 and 4 months of age. Information regarding food intake was assessed using a list of 48 foods, with two key aspects recorded: whether the food was introduced (yes/no) and the age at introduction. To define food introduction patterns, we employed k-means cluster analysis. Hierarchical Poisson multiple regression was employed to examine the associations between sociodemographic, biological, and healthcare factors and patterns of food introduction.

RESULTS

Three distinct patterns were identified and named according to their main characteristics: Pattern 1 - "Low Infant Formula and Timely CF Introduction"; Pattern 2 - "High Infant Formula and Early CF Introduction"; and Pattern 3 - "High Infant Formula and Later Ultra-processed Food Introduction". Breastfeeding at six months showed a positive association with Pattern 1 (PR = 1.40; 95% CI = 1.10-1.80), while bottle use at four months was negatively associated with Pattern 1 (PR = 0.68; 95% CI = 0.53-0.87). No variables studied exhibited an association with Pattern 2. For Pattern 3, higher prevalences were observed among children whose mothers were aged < 20 years (PR = 1.54; 95% CI = 1.13-2.01) or > 34 years (PR = 1.42; 95% CI = 1.04-1.93). Not receiving guidance on the recommended duration of breastfeeding and complementary feeding during prenatal care was associated with a higher prevalence of children in this pattern (PR = 1.35; 95% CI = 1.01-1.80).

CONCLUSIONS

We identified three distinct patterns of age at food introduction in the study population, although none perfectly aligned with Brazilian or WHO dietary recommendations. These findings underscore the need for targeted interventions to promote timely and healthy complementary feeding practices in Brazilian infants.

Nipple shield use in the maternity ward increases risk of exclusive breastfeeding interruption in the first six months of infant's life

OBJECTIVE

The objective of this study was to investigate the association between use of silicone nipple shields in the maternity ward and exclusive breastfeeding interruption in the first 6 months of the infant's life.

DESIGN

Cohort study.

SETTING

Interviews were conducted personally at the mother's home at 1 and 6 months postpartum and by telephone at 2 and 4 months.

PARTICIPANTS

287 mother-infant dyads.

METHODS

Lactating mothers were randomly selected at two maternity wards (one public, one private) in Porto Alegre, Brazil. Data were analyzed using Kaplan-Meier survival curves and Cox multivariate regression. The outcome of interest was exclusive breastfeeding interruption before 6 months of the infant's life.

FINDINGS

Nipple shields were used by 6.2 % of the women in the public maternity ward and by 25.8 % of those in the private setting. Median duration of exclusive breastfeeding was 11 days (95 %CI 0.0-36.9) among women who used the accessory vs. 89 days (95 %CI 60.8-117.2) among those who did not. Nipple shield use in the maternity ward was associated with exclusive breastfeeding interruption before 6 months of infant's life (adjusted risk ratio = 1.47; 95 %CI 1.01-2.15). The risk was higher in the first months of breastfeeding, ranging from 2.0 to 1.47 in the first and sixth months, respectively.

CONCLUSIONS

The use of silicone nipple shields in the maternity ward increased the risk of exclusive breastfeeding interruption before 6 months of the infant's life, especially in the first months. These findings suggest caution in recommending this accessory to new mothers.

Women's Satisfaction with Breastfeeding and Risk of Exclusive Breastfeeding Interruption

This prospective cohort study was conducted to evaluate the association between women's satisfaction with breastfeeding at 1 month post-partum and the risk of exclusive breastfeeding (EBF) interruption before 6 months. 287 mother-infant dyads randomly selected from two maternity hospitals were followed from birth to 24 months of infant's age. Women's satisfaction with breastfeeding was assessed using the Maternal Breastfeeding Evaluation Scale (MBFES) at 1 month. The association between women's satisfaction with breastfeeding and risk of EBF interruption before 6 months was estimated using Cox proportional hazards model. Kaplan-Meier survival curves for EBF were compared between women with lower satisfaction with breastfeeding (MBFES score < median 124) and those with higher satisfaction (MBFES score ≥ 124). Median EBF duration in women with higher satisfaction was 120 days (95%CI 109-131), vs. 26 days (95%CI 19-33) in less satisfied women. Each additional point on MBFES promoted a reduction of 2.0% in the risk of EBF interruption. Among women with satisfaction scores < 124, the risk of EBF interruption was 86% higher when compared with those ≥ 124 (adjusted hazard ratio 1.86; 95%CI 1.41-2.46). Lower maternal satisfaction with breastfeeding in the first month post-partum is associated with a higher risk of EBF interruption before 6 months.