Stunting, recovery from stunting and puberty development in the MINIMat cohort, Bangladesh

Early Life Environmental Exposure to Cadmium, Lead, and Arsenic and Age at Menarche: A Longitudinal Mother-Child Cohort Study in Bangladesh

BACKGROUND

Several metals act as endocrine disruptors, but there are few large longitudinal studies about associations with puberty onset.

OBJECTIVES

We evaluated whether early life cadmium, lead, and arsenic exposure was associated with timing of menarche.

METHODS

In a mother-child cohort in rural Bangladesh (n=935), the exposure was assessed by concentrations in maternal erythrocytes in early pregnancy and in girls' urine at 5 and 10 years of age using inductively coupled plasma mass spectrometry. The girls were interviewed twice, at average ages 13.3 [standard deviation (SD)=0.43] and 13.8 (SD=0.43) y, and the date of menarche, if present, was recorded. Associations were assessed using Kaplan-Meier analysis and multivariable-adjusted Cox regression.

RESULTS

In total, 77% of the girls (n=717) had reached menarche by the second follow-up. The median age of menarche among all girls was 13.0 y (25th-75th percentiles: 12.4-13.7 y). At 10 years of age, median urinary cadmium was 0.25μg/L (5th-95th percentiles: 0.087-0.72μg/L), lead 1.6μg/L (0.70-4.2μg/L), and arsenic 54μg/L (19-395μg/L). Given the same age, girls in the highest quartile of urinary cadmium at 5 and 10 years of age had a lower rate of menarche than girls in the lowest quartile, with an adjusted hazard ratio of (HR) 0.80 (95% CI: 0.62, 1.01) at 5 years of age, and 0.77 (95% CI: 0.60, 0.98) at 10 years of age. This implies that girls in the highest cadmium exposure quartile during childhood had a higher age at menarche. Comparing girls in the highest to the lowest quartile of urinary lead at 10 years of age, the former had a higher rate of menarche [adjusted HR = 1.23 (95% CI: 0.97, 1.56)], implying lower age at menarche, whereas there was no association with urinary lead at 5 years of age. Girls born to mothers in the highest quartile of erythrocyte arsenic during pregnancy were less likely to have attained menarche than girls born to mothers in the lowest quartile [adjusted HR= 0.79 (95% CI: 0.62, 0.99)]. No association was found with girls' urinary arsenic exposure.

DISCUSSION

Long-term childhood cadmium exposure was associated with later menarche, whereas the associations with child lead exposure were inconclusive. Maternal exposure to arsenic, but not cadmium or lead, was associated with later menarche. https://doi.org/10.1289/EHP11121.

Diet and Nutrients Intakes during Infancy and Childhood in Relation to Early Puberty: A Systematic Review and Meta-Analysis

The onset of puberty has become earlier over the decades, and nutrients and diet are related to the timing of puberty onset. Hence, we aimed to investigate the association between diet or nutrients in infancy, childhood and early puberty. PubMed, Embase, and Cochrane library were searched systematically up to 15 April 2022. The pooled relative risks (RRs) or regression coefficients (beta) were estimated using the random-effect model or fixed-effect model according to the heterogeneity between studies. Twenty-two articles on diet or nutrients in childhood and six about breastfeeding in infancy were included. The prolonged breastfeeding duration in infancy could reduce the risk of early menarche (beta 0.31, 95% CI: 0.01, 0.60, p = 0.045). The high intake of yogurt was associated with a 35% reduction in the risk of earlier menarche (RR 0.65, 95% CI: 0.47, 0.89, p = 0.008). Girls with severe food insecurity experienced later menarche (RR 0.81, 95% CI: 0.67, 0.98, p = 0.027). Conversely, due to the high intake of protein, the risk of early menarche increased by 8% (RR 1.08, 95% CI: 1.01, 1.16, p = 0.016). High intake of yogurt, longer duration of breastfeeding, and food insecurity decreased the possibility of earlier menarche, while high intake of protein increased that risk. As a modifiable factor, diet and nutrients in infancy and childhood provide new insights into the future prevention of early puberty.

Systematic review to evaluate a potential association between helminth infection and physical stunting in children

Background

Despite considerable public health efforts over the past 20 years, childhood stunting (physical and/or cognitive) levels globally remain unacceptably high—at 22% amongst children under 5 years old in 2020. The aetiology of stunting is complex and still largely unknown. Helminths can cause significant mortality and morbidity and have often been cited as major causative agents for stunting, although their actual role in childhood stunting remains unclear. Our aim was to systematically review the current evidence to help support or refute the hypothesis that helminths cause physical stunting in children.

Methods

Inclusion criteria were as follows: infected with (and/or exposed to) helminths (soil-transmitted helminths, schistosomes or food-borne trematodes), children, pregnant or breastfeeding women as study participants (children included infants 0–1 year old, preschool-age children 1–5 years and school-age children > 5 years old), anthelmintic treatment intervention, stunting-related variables reported (e.g. height, height-for-age z-score, birth weight), helminth infection reported in relation to stunting, any geographic location, any date, peer-reviewed literature only. Exclusion criteria were: non-primary research, study protocols, studies with no new data, non-English language papers and animal (non-human) helminth studies. Seven databases were searched on 28 May 2021. Risk of bias was assessed for included studies and GRADE was used for studies included in RCT subgroup meta-analyses (in preschool-age children and pregnant women). This systematic review was registered with PROSPERO (CRD42021256201).

Results

Eighty studies were included in the analyses. No significant overall evidence was found in support of the hypothesis that helminths cause physical stunting in children, although there was some association with wasting.

Conclusions

Whilst analyses of the available literature to date failed to support a direct association between helminth infection and childhood stunting, there was significant heterogeneity between studies, and many had follow-up periods which may have been too short to detect impacts on growth. Most apparent was a lack of available data from key demographic groups wherein one may predict the greatest association of helminth infection with stunting—notably that of infants, preschool-age children, and pregnant or nursing women. Thus this review highlights the urgent need for further targeted empirical research amongst these potentially most vulnerable demographic groups.

Graphical Abstract

Supplementary Information

The online version contains supplementary material available at 10.1186/s13071-022-05235-5.

Healthy Family Index of Families with Children Experiencing Stunting

Stunting is a global problem that has a long-term impact on the quality of human resources. Stunting prevention can be achieved throughout supervision during the first 1000 days of life. The study aimed to examine whether health-conscious families can reduce and prevent stunting. The study location was in the operational area of Mifa Bersaudara Ltd. from March to September 2019. The research method used in this study was a quantitative observational study using a cross-sectional design. The instrument assessing the family health indicators issued by the Ministry of Health of Indonesia was used. The data were analysed using the health-conscious family index formula and Z-score for the infant nutritional status. The study participants were 293 families with toddlers. The study results show that the families living surrounding the operational area of the Mifa Bersaudara Ltd. are mostly pre-healthy families (51.5%) with more than 30% (n=88) of stunted children. There is a relationship between a healthy family index and stunting (p-value<0.05). The logistic regression test shows a significant relationship between the incidence of stunting and the families following the family planning program, exclusive breastfeeding, toddlers receiving monitoring, and no family members who smoke. Stunting is associated with health-conscious families. The incidence of stunting in infants and toddlers is associated with families that plan the pregnancy spacing (family planning), babies getting exclusive breastfeeding, toddlers getting growth monitoring, and no smoking family members.

Maternal education and sibling inequalities in child nutritional status in Ethiopia

In many societies child nutritional status varies between siblings because of parental gender and birth order preferences and differential intra-household resource allocation. While more educated women have been found to improve children's nutrition overall, it is unclear whether they also buffer sibling inequalities in nutritional status. We study the interplay between parental preferences, maternal education, and sibling inequalities in child nutritional status in Ethiopia, the second most populous country in sub-Saharan Africa, with high rates of malnutrition, rapid socio-economic change, urban fertility decline, and low, but increasing female education. We base our analysis on a pooled sample of the 2011/12, 2013/14, and 2015/16 waves of the Ethiopian Socioeconomic Survey using 8275 observations from 4402 children between the age of six months and 9 years old nested in 1687 households. Results from multilevel and fixed effects models show sizable gender and birth order differences in nutritional status. Boys had a better nutritional status than girls and earlier born children had a better nutritional status than later born children, both in terms of height-for-age and weight-for-age. More educated mothers buffered sibling inequalities in nutritional status according to birth order, but not according to gender. The height penalty of being a higher order child disappeared for children whose mothers had about eight years of education or more (primary school finished/some secondary school). The beneficial impact of maternal education, counteracting some within-family inequalities, asks for continued investments in girls' and women's education.

•

The maternal education and siblings' nutrition relationship is not well understood.

•

We found steep gender and birth order gradients in child nutritional status.

•

Educated mothers buffer sibling inequalities in nutrition according to birth order.

•

Educated mothers do not compensate inequalities between boys and girls.

•

Maternal education's influence is independent of household wealth and residence.

Increasing Mothers’ Knowledge of Infant and Young Child Feeding through Booklets in Banggai Regency, Central Sulawesi Province, Indonesia

Background: Stunting is caused in part by feeding behavior in infants and young children. Knowledge is the most important factor in shaping one's attitude and behavior, particularly when it comes to infants and young children feeding. This study aims to find out how the mothers’ knowledge of infant and child feeding could be increased through booklets in Banggai Regency, Central Sulawesi Province, Indonesia. Method: This study is a quasi-experimental non-randomized study with pre and post-test only control design. Study was conducted in Jayabakti Village, Banggai Regency. Sample consisted of 40 mothers of children under five collected with purposive sampling method from October to December 2020. At the local Integrated Health Service Post, booklets were distributed once a month as part of the study intervention. Over the duration of the three-month study period, booklets were distributed three times. The used booklets were the modified version of the WHO-developed Infant and Young Child Feeding Counseling: An Integrated Course. The mean difference was used to compare the results of the pre- and post-tests on knowledge of infant and young child feeding. The hypothesis test was applied with a 95% confidence level of 0.05. Result: The respondents with ages ranging between 15 and 20 were 42.5%. Mothers graduated from senior high schools were 45%. Mothers that had three children were 55.0%. Family income was 586,000 rupiahs in average. After the booklets distribution for three months, there was an increase in the mothers’ knowledge regarding infant and young child feeding. The older the mother's age, the better her knowledge (p=0,015). Factors of children's age and mother's education did not have a significant effect. Conclusion: Mothers knowledge regarding infant and young child feeding at Banggai Regency Central of Sulawesi is generally good. After using the booklets, their knowledge has increased. With time, the mother's knowledge expands. Formal education has no significant effect on infants and young children nutrition knowledge

Phenomenology Study of Stunting Nutrition for Babies in the Work Area of Pante Kuyun Health Center, Aceh Jaya District

BACKGROUND: Stunting causes organs not to grow and develop optimally. One of the factors that indirectly influence stunting in children is the mother’s parenting style. Parenting includes the family’s ability to provide time, attention, and support in meeting the physical, mental and social needs of children growing in the family. AIM: This is to find out the nutrition parenting patterns of children who are stunted in the working area of the Health Center Pante Kuyun, Aceh Jaya Regency. METHODS: This study uses qualitative methods with a phenomenological approach. This research was conducted in the working area of Pante Kuyun Health Center, Aceh Jaya Regency. The research was carried out for 1 month, starting from August to September. The choice of research location was due to the high incidence of stunting in the area. The number of samples was determined 15 people consisting of 10 children under five who were stunted, two people as the head of the Health Center, and two community leaders from various elements. This study uses recording devices, video recording devices (camcorders), tape recorders, group discussion guidelines, and field notes. Data analysis techniques used in qualitative research include transcript analysis of interview results, data reduction, analysis, data interpretation, and triangulation. RESULTS: Stunting is closely related to the social construction of society. There are differences in social constructs that shape the parenting styles’ understanding for toddlers who are stunted. During pregnancy, most mothers follow the restrictions recommended by their parents and in-laws. The number of taboo foods to be consumed during pregnancy to breastfeeding generally comes from the food group of animal protein sources such as squid, shrimp, crab, shellfish, and so on. These foods are believed to cause the, etc., become sticky, making it difficult for the delivery process, and milk is difficult to pass. It turns out that the customs, culture, and hereditary habits that continue to be carried out influence stunting in children under five. The pattern of nutrition parenting during the postpartum, postpartum period also causes stunting. During postpartum, the culture in society prohibits food other than white rice, and the fish is only anchovies. It turns out that the lack of intake during the postpartum period up to 40 days has an impact on the health of the postpartum, postpartum mother, especially only a little breast milk, dry skin, weakness, dizziness, and even sickness. Community beliefs also influence nutritional care patterns. For infants aged 0–6 months, none of the informants’ toddlers receive exclusive; breastfeeding. Exclusive breastfeeding is not given to children due to the mother’s lack of knowledge about exclusive breastfeeding benefits. The eating habit prioritizes elders’ advice such as parents, in-laws, and religious leaders are still related to myths about health and nutrition in pregnant women and toddlers. The pattern of nutrition parenting performed by mothers for infants >6 months is not under the Indonesian Ministry of Health recommendations. In the Aceh Jaya district, mothers habitually give instant noodles as a substitute for the rice to consume toddlers. However, their mothers also have parenting styles, whereas if the working mothers provide food for toddlers, they are older siblings, grandmothers, or nieces. Inadequate care, such as improper feeding from infancy to toddlerhood, causes toddlers to suffer from illness more often due to disruption of digestion because the baby’s intestines are still vulnerable. CONCLUSION: Parenting affects toddlers who experience stunting in the working area of Pante Kuyun Community Health Center, Aceh Jaya Regency.

Characterization of pubertal development of girls in rural Bangladesh

This study aimed to describe the timing and patterns of pubertal maturation of girls living in rural Bangladesh. Starting in September 2015, a total of 15,320 girls from a birth cohort, aged 9 to 15 years at initial encounter, were visited twice at about a one year interval, typically in their birth month. Participants were asked to self-report extent of pubertal maturation, including breast development, pubic hair growth and age at menarche, if applicable. Pubertal stage (abbreviated as B2 and B3-4 for breast development and PH2 and PH3-4 for pubic hair growth) was assigned. Data from both visits were pooled, yielding a total of 29,377 age-related observations per pubertal characteristic. Probit regression models were used to estimate distributions of age at which each stage of pubertal development was attained. Before age 8, <3% of the study population initiated pubertal maturation as indicated by onset of breast development (B2). The median (95% confidence interval) age of B2 and B3-4 was 11.02 (11.00–11.04) and 12.82 (12.80–12.83) years, respectively; and 12.93 (12.91–12.94) and 14.29 (14.27–14.31) years for the onset (PH2) and advanced stage (PH3-4) of pubic hair growth, respectively. Median age at menarche was 13.17 (13.15–13.19) years, with 2.15 years of timespan from B2 to menarche. Girls in rural Bangladesh progressed through puberty following a well-documented sequence of sexual maturation stages. The age at which each pubertal milestone took place was somewhat later, but the tempo from breast development to menarche was comparable to that observed elsewhere. Our findings present a current norm of pubertal maturation in a typical, rural adolescent population in South Asia, which could help inform future studies and interventions to preserve or improve early adolescent health and development.

Sociocultural and economic determinants of stunting and thinness among adolescent boys and girls in Nepal

Despite the increasing interest in the determinants of adolescent undernutrition in low- and middle-income countries, a comprehensive multi-level overview at the country level is missing. Using the nationally representative 2014 Nepal Adolescent Nutrition Survey, this study aimed to provide a comprehensive overview of the sociocultural and economic determinants of stunting and thinness of adolescent boys and girls in Nepal. Multivariate logistic regression models were used to estimate the associations between multiple individual, household and community determinants and stunting and thinness among 3773 adolescents aged 10-19 years (1888 boys and 1885 girls). The prevalence rates of stunting and thinness indicated suboptimal nutritional status and an inadequate growth environment in Nepali adolescents. The results highlighted an association of paternal occupation and education, household income, number of earning household members, geographical place of residence, caste/ethnicity and nutritional knowledge with stunting, with higher odds for males and older adolescents. Paternal occupation, education, household income, geographical region, caste/ethnicity and nutrition knowledge were associated with thinness, with higher odds for males and younger adolescents. The findings underscore the importance of involving adolescents, their parents and their communities in interventions. Such interventions should not only be aimed at improving adolescent nutrition but also at optimizing adolescents' growth environment for better health and development. Future research should focus on context-specific causal pathways and mechanisms through which sociocultural and economic determinants influence nutritional outcomes within broader societal, cultural and political settings. A longitudinal approach, including a range of dietary and nutrition indicators would allow understanding how and when the relative importance of these factors change during adolescence.

Can Children Catch up from the Consequences of Undernourishment? Evidence from Child Linear Growth, Developmental Epigenetics, and Brain and Neurocognitive Development

Recovery from nutritionally induced height deficits continues to garner attention. The current literature on catch-up growth, however, has 2 important limitations: wide-ranging definitions of catch-up growth are used, and it remains unclear whether children can recover from the broader consequences of undernutrition. We addressed these shortcomings by reviewing the literature on the criteria for catch-up in linear growth and on the potential to recover from undernutrition early in life in 3 domains: linear growth, developmental epigenetics, and child brain and neurocognitive development. Four criteria must be met to demonstrate catch-up growth in height: after a period in which a growth-inhibiting condition (criterion 1) causes a reduction in linear growth velocity (criterion 2), alleviation of the inhibiting condition (criterion 3) leads to higher-than-normal velocity (criterion 4). Accordingly, studies that are observational, do not use absolute height, or have no alleviation of an inhibiting condition cannot be used to establish catch-up growth. Adoption and foster care, which provide dramatic improvements in children's living conditions not typically attained in nutrition interventions, led to some (but incomplete) recovery in linear growth and brain and neurocognitive development. Maternal nutrition around the time of conception was shown to have long-term (potentially permanent) effects on DNA methylation in the offspring. Undernourishment early in life may thus have profound irreversible effects. Scientific, program, and policy efforts should focus on preventing maternal and child undernutrition rather than on correcting its consequences or attempting to prove they can be corrected.