Determinants of growth retardation in Southern Brazil

Optimum birth interval (36-48 months) may reduce the risk of undernutrition in children: A meta-analysis

Background

Although some studies have highlighted short birth interval as a risk factor for adverse child nutrition outcomes, the question of whether and to what extent long birth interval affects better nutritional outcomes in children remains unclear.

Methods

In this quantitative meta-analysis, we evaluate the relationship between different birth interval groups and child nutrition outcomes, including underweight, wasting, and stunting.

Results

Forty-six studies with a total of 898,860 children were included in the study. Compared with a short birth interval of <24 months, birth interval of ≥24 months and risk of being underweight showed a U-shape that the optimum birth interval group of 36-48 months yielded the most protective effect (OR = 0.54, 95% CI = 0.32-0.89). Moreover, a birth interval of ≥24 months was significantly associated with decreased risk of stunting (OR = 0.61, 95% CI = 0.55-0.67) and wasting (OR = 0.63, 95%CI = 0.50-0.79) when compared with the birth interval of <24 months.

Conclusion

The findings of this study show that longer birth intervals (≥24 months) are significantly associated with decreased risk of childhood undernutrition and that an optimum birth interval of 36-48 months might be appropriate to reduce the prevalence of poor nutritional outcomes in children, especially underweight. This information would be useful to government policymakers and development partners in maternal and child health programs, especially those involved in family planning and childhood nutritional programs.

Risk factors for child stunting in Bangladesh: an analysis using MICS 2019 data

Background

Malnutrition is considered a major public health challenge and is associated with a range of health issues, including childhood stunting. Stunting is a reliable and well-recognized indicator of chronic childhood malnutrition. The objective of this study is to determine the risk factors associated with stunting among 17,490 children below five years of age in Bangladesh.

Methods

Correlates of child stunting were examined using data generated by a cross-sectional cluster survey conducted in Bangladesh in 2019. The data includes a total of 17,490 children (aged < 5 years) from 64,400 households. Multiple logistic regressions were used to determine the risk factors associated with child stunting and severe stunting.

Results

The prevalence of stunting and severe stunting for children was 25.96% and 7.97%, respectively. Children aged 24 to < 36 months [Odds Ratio (OR) = 2.65, 95% CI: 2.30, 3.05] and aged 36 to < 48 months [OR = 2.33, 95% CI: 2.02, 2.69] had more risk of stunting compared to the children aged < 6 months. Children from Sylhet division had the greatest risk of stunting of all the eight divisions [OR = 1.26, 95% CI: 1.09, 1.46]. Children of secondary complete or higher educated mothers were less likely to develop stunting [OR = 0.66, 95% CI: 0.56, 0.79] compared with children of mothers having no education at all. Similarly, children of secondary complete or higher educated father [OR = 0.74, 95% CI: 0.63, 0.87] were found to have lower risk of stunting compared with children whose father hadn’t any education. Substantially lower risk of stunting was observed among children whose mother and father both completed secondary education or above [OR = 0.59, 95% CI: 0.52, 0.69]. Children from the richest households [OR = 0.49, 95% CI: 0.41, 0.58] had 51% lower odds of stunting compared to children from the poorest households.

Conclusions

After controlling for socioeconomic and demographic factors, parental education and household position in the wealth index were found to be the most important determinants of child stunting in Bangladesh.

Malnutrition and its associated factors: a cross-sectional study with children under 2 years in a suburban area in Angola

BACKGROUND

The prevalence of child malnutrition in Angola is still very high, and little is known about its associated factors. The aim of this study was to identify these factors in children under 2 years in a suburban area of the country's capital city.

METHODS

We used data from a cross-sectional population-based study conducted in 2010. The outcomes studied were stunting and underweight. Multivariable analysis was conducted; prevalence ratios were estimated by Poisson regression with robust variance using a hierarchical model.

RESULTS

Of the children studied (N = 749), 232 [32.0% (95% CI: 28.7-35.5%)] were stunted and 109 [15.1% (95% CI: 12.6-17.9%)] were underweight. In multivariable analysis, occurrence of diarrhea (PR 1.39 [95% CI: 1.07-1.87]) and the death of other children in the household (PR 1.52 [95% CI: 1.01-2,29]) were associated with stunting and underweight, respectively. In the model composed only of distal and intermediate factors, the primary caregiver not being the mother increased the prevalence of stunting by 42% (PR 1.42 [95% CI: 1.10-1.84], and a mother's working outside the house while not being self-employed was associated with its reduced prevalence (PR 0.55 [95% CI: 0.34-0.89]). In the intermediate model, each additional month of delay in the onset of prenatal care increased the relative prevalence of underweight by 20% (PR 1.20 [95% CI: 1.03-1.40]).

CONCLUSIONS

Despite the high prevalence rates of stunting and underweight, relatively few risk factors were identified for these conditions, suggesting that collective exposures are likely to play a major role in causing malnutrition in Angola. The individual factors identified can be useful for the development of strategies to deal with this public health problem.

Diagram-based Analysis of Causal Systems (DACS): elucidating inter-relationships between determinants of acute lower respiratory infections among children in sub-Saharan Africa

BACKGROUND

Effective interventions require evidence on how individual causal pathways jointly determine disease. Based on the concept of systems epidemiology, this paper develops Diagram-based Analysis of Causal Systems (DACS) as an approach to analyze complex systems, and applies it by examining the contributions of proximal and distal determinants of childhood acute lower respiratory infections (ALRI) in sub-Saharan Africa.

RESULTS

Diagram-based Analysis of Causal Systems combines the use of causal diagrams with multiple routinely available data sources, using a variety of statistical techniques. In a step-by-step process, the causal diagram evolves from conceptual based on a priori knowledge and assumptions, through operational informed by data availability which then undergoes empirical testing, to integrated which synthesizes information from multiple datasets. In our application, we apply different regression techniques to Demographic and Health Survey (DHS) datasets for Benin, Ethiopia, Kenya and Namibia and a pooled World Health Survey (WHS) dataset for sixteen African countries. Explicit strategies are employed to make decisions transparent about the inclusion/omission of arrows, the sign and strength of the relationships and homogeneity/heterogeneity across settings.Findings about the current state of evidence on the complex web of socio-economic, environmental, behavioral and healthcare factors influencing childhood ALRI, based on DHS and WHS data, are summarized in an integrated causal diagram. Notably, solid fuel use is structured by socio-economic factors and increases the risk of childhood ALRI mortality.

CONCLUSIONS

Diagram-based Analysis of Causal Systems is a means of organizing the current state of knowledge about a specific area of research, and a framework for integrating statistical analyses across a whole system. This partly a priori approach is explicit about causal assumptions guiding the analysis and about researcher judgment, and wrong assumptions can be reversed following empirical testing. This approach is well-suited to dealing with complex systems, in particular where data are scarce.

Nutritional status of children under 5 years of age in the Brazilian Western Amazon before and after the Interoceanic highway paving: a population-based study

BACKGROUND

The aim of this study was to analyse the prevalence of undernutrition, overweight and associated factors, before and after the implementation of the Interoceanic Highway.

METHODS

A population-based cross-sectional study on children under 5 years of age was conducted in the municipality of Assis Brasil, AC, Brazil, in 2003 and 2010. Prevalence of undernutrition was observed by using height-for-age Z-scores (HAZ) and adopting a cut-off point equal to or lower than a -2 Z-score. Overweight prevalence was defined by a cut-off point equal to or greater than a +2 Z-score of the WHZ index. Z-scores were calculated relative to WHO 2006 reference data. Semi-structured questionnaires were applied to the children's guardians, investigating family socio-economic and demographic characteristics, morbidities, access to services and child care. Associated factors were identified by hierarchical multiple logistic regression analysis.

RESULTS

The prevalence of low HAZ (undernutrition) was 7.0% in 2003 and 12.2% in 2010. The prevalence of high WHZ (overweight) was 1.0% and 6.6% for 2003 and 2010, respectively. It was not possible to adjust the multiple model for the year 2003. The factors associated with low HAZ in 2010 were: wealth index, the situation of living with biological parents, maternal height and presence of open sewage, whereas the factors associated with a high WHZ in the same year were: child's age, mother's time of residence in the location, mother's body mass index.

CONCLUSIONS

Overweight increase within this undernutrition scenario reveals that the process of nutritional transition began in this Amazonian city only in the last decade, and therefore, it is delayed when compared to overweight in other parts of Brazil. Such nutritional transition in Assis Brasil may have been facilitated by the construction of the Interoceanic Highway.

Impacts of domestic violence on child growth and nutrition: a conceptual review of the pathways of influence

Domestic violence against women is a global problem, and young children are disproportionate witnesses. Children's exposure to domestic violence (CEDV) predicts poorer health and development, but its effects on nutrition and growth are understudied. We propose a conceptual framework for the pathways by which domestic violence against mothers may impair child growth and nutrition, prenatally and during the first 36 months of life. We synthesize literatures from multiple disciplines and critically review the evidence for each pathway. Our review exposes gaps in knowledge and opportunities for research. The framework also identifies interim strategies to mitigate the effects of CEDV on child growth and nutrition. Given the global burden of child malnutrition and its long-term effects on human-capital formation, improving child growth and nutrition may be another reason to prevent domestic violence and its cascading after-effects.

Hospital admissions from birth to early adolescence and early-life risk factors: the 11-year follow-up of the 1993 Pelotas (Brazil) birth cohort study

The aim of this prospective analysis was to describe the cumulative incidence of hospital admissions in the first year of life and between 1 and 11 years of age and to explore associated factors. Hospital admissions were collected through regular monitoring in the first year of life, and through maternal report on admissions between 1 and 11 years. Analyses were stratified by sex and adjusted for confounding factors. 18.1% of children were hospitalized in the first year of life, and 30.7% between ages 1 and 11 years. Among boys, hospital admission in the first year was associated with low family income, paternal smoking during pregnancy, preterm delivery, and low birthweight. Among girls, in addition to the variables described for boys, black/mixed skin color was also a risk factor for hospital admission. For admissions between 1 and 11 years of age, low family income and gestational age > 37 weeks were found to be significant risk factors.

Risk factors for stunting among under-fives in Libya

Objective

Stunting is a chronic condition reflecting poor nutrition and health. Our aim was to ascertain major predictors of stunting in children <5 years old in Libya.

Population and methods

A nationally representative, cross-sectional, two-stage stratified cluster sample survey enrolled 4549 under-fives from 6707 households. Logistic regression was used to determine individual risk factors in bivariate and multivariate analyses.

Results

Anthropometric measurements were available for 4498 children. Among the 929 stunted children (20·7 %), 495 were boys (53·3 %) and 434 were girls (46·5 %). In multivariate analysis, risk factors were young age (1–2 years: OR = 2·32, 95 % CI 1·67, 3·22; 2–3 years: OR = 1·64, 95 % CI 1·22, 2·21), resident of Al-Akhdar (OR = 1·67, 95 % CI 1·08, 2·58), being a boy (OR = 1·28, 95 % CI 1·05, 1·55), having a less educated father (illiterate: OR = 2·10, 95 % CI 1·17, 3·77; preparatory school: OR = 1·71, 95 % CI 1·11, 2·65), poor psychosocial stimulation (no family visits or trips: OR = 1·52, 95 % CI 1·07, 2·16; father rarely/never plays with child: OR = 2·24, 95 % CI 1·20, 4·16), filtered water (OR = 8·45, 95 % CI 2·31, 30·95), throwing garbage in the street (OR = 13·81, 95 % CI 2·33, 81·72), diarrhoea (OR = 1·58, 95 % CI 1·09, 2·29) and low birth weight (OR = 1·8, 95 % CI 1·17, 2·40). Protective factors were older age of father (OR = 0·53, 95 % CI 0·32, 0·90) and water storage (OR = 0·70, 95 % CI 0·54, 0·90). These variables only explained 20 % of cases of stunting.

Conclusion

Various multilevel actions are needed to improve nutritional status of under-fives in Libya. At risk-groups include those with young age (1–3 years), resident of Al-Akhdar region, boys, father’s low educational level, poor psychosocial stimulation, poor housing environment, diarrhoea and low birth weight.

Reconsidering childhood undernutrition: can birth spacing make a difference? An analysis of the 2002-2003 El Salvador National Family Health Survey

It is well understood that undernutrition underpins much of child morbidity and mortality in less developed countries, but the causes of undernutrition are complex and interrelated, requiring a multipronged approach for intervention. This paper uses a subsample of 3853 children under age 5 from the most recent family health survey in El Salvador to examine the relationship between birth spacing and childhood undernutrition (stunting and underweight). While recent research and guidance suggest that birth spacing of three to five years contributes to lower levels of infant and childhood mortality, little attention has been given to the possibility that short birth intervals have longer-term effects on childhood nutrition status. The analysis controls for clustering effects arising from siblings being included in the subsample, as well as variables that are associated with household resources, household structure, reproductive history and outcomes, and household social environment. The results of the multiple regression analyses find that in comparison to intervals of 36-59 months, birth intervals of less than 24 months and intervals of 24-35 months significantly increase the odds of stunting (<24 months Odds Ratio (OR) = 1.52; 95% confidence interval (CI): 1.21-1.92; 25-36 months OR = 1.30; 95% CI: 1.05-1.64). Other factors related to stunting and underweight include standard of living index quintile, child's age, mother's education, low birthweight, use of prenatal care, and region of the country where the child lives. Policy and program implications include more effective use of health services and outreach programs to counsel mothers on family planning, breastfeeding, and well child care.

Soropositividade para doença celíaca em crianças e adolescentes com baixa estatura

OBJETIVO: Avaliar a frequência da positividade do marcador sorológico para doença celíaca em crianças e adolescentes com baixa estatura, utilizando-se o anticorpo anti-transglutaminase humana como teste de triagem. MÉTODOS: Estudo descritivo com amostra obtida por conveniência. Foi realizado no período de abril a setembro de 2004 no Ambulatório Geral de Pediatria do Instituto Materno Infantil Professor Fernando Figueira e no Ambulatório de Crescimento e Desenvolvimento do Hospital das Clínicas. Foram considerados casos as crianças e os adolescentes portadores de baixa estatura, definida como aquela abaixo do percentil 3 para idade e sexo, utilizando como referência o gráfico de altura/idade do National Center for Health Statistics, 2000. Foi pesquisado o anticorpo anti-transglutaminase humana (AATGh), considerado positivo se concentração >20U/mL e, nos positivos, o anticorpo antiendomísio (AAE). RESULTADOS: Foram avaliados 78 pacientes, sendo 41 (53%) do sexo feminino. O AATGh foi positivo em 3/78 (3,8%) dos pacientes. O AAE foi positivo em um paciente, naquele com concentração mais elevada do AATGh. Considerando-se a positividade para os dois testes, a soropositividade foi de 1,3%. CONCLUSÕES: A presença de marcador sorológico para doença celíaca em crianças e adolescentes portadoras de baixa-estatura e pertencentes a famílias de baixa-renda aponta para a necessidade de investigação sistemática da doença celíaca nesses pacientes.

[Growth of full term low and adequate birth weight infants during the first two years of life]

OBJECTIVE

To assess the growth pattern of full term low and adequate birth weight infants during the first two years of life and to identify the determinants at the time of the greatest growth deceleration.

METHODS

A prospective cohort study was conducted with 148 full term infants in five small towns of the state of Pernambuco, Northeastern Brazil. Newborns were recruited from maternities between January 1993 and January 1994 and their anthropometric measurements were taken at one, two, four, six, 12 and 24 months of life. Risk factors were analyzed using multivariable linear regression.

RESULTS

The increment of mean weight-for-age and length-for-age were more evident for low birth weight when compared with adequate weight infants, especially during the first two months after birth. From this point onward it was observed a progressive mean growth deceleration in both indexes up to 12 months of life. All infants had similar weight and length growth patterns. However, adequate birth weight infants remained in an upper level. Socioeconomic variables explained 23% of variation for weight-for-age, followed by 4% for birth weight. Socioeconomic condition was also the factor mostly affecting length-for-age, explaining 28% of its variation, followed by birth weight, maternal height and diarrhea.

CONCLUSIONS

The study results suggest that interventions aiming to adequate growth should focus on prenatal care and social and environmental factors during childhood as a way of ensuring full expression of the genetic potential of this population.

Parasite and maternal risk factors for malnutrition in preschool-age children in Belen, Peru using the new WHO Child Growth Standards

Child malnutrition, including wasting, underweight and stunting, is associated with infections, poor nutrient intake, and environmental and socio-demographic factors. Preschool-age children are especially vulnerable due to their high growth requirements. To target interventions for preschool-age children in a community of extreme poverty in Peru, we conducted a household survey between October 2005 and January 2006 to determine the prevalence of malnutrition and its risk factors. Of 252 children < 5 years old, the prevalence of wasting, underweight and stunting was 26.6, 28.6 and 32.1 %, respectively, based on the new WHO Child Growth Standards. Risk factors for wasting were: (1) moderate-high intensity Trichuris infection (OR 2.50; 95 % CI 1.06, 5.93); (2) hookworm infection (OR 6.67; 95 % CI 1.08, 41.05); (3) age (OR6-month 1.27; 95 % CI 1.11, 1.46); (4) maternal education (secondary incomplete) (OR 5.77; 95 % CI 2.38, 13.99); and (5) decreasing maternal BMI (OR1 kg/m2 1.12; 95 % CI 1.02, 1.23). Risk factors for underweight were: (1) moderate-high intensity Trichuris infection (OR 4.74; 95 % CI 1.99, 11.32); (2) age (OR6-month 1.22; 95 % CI 1.07, 1.38); (3) maternal education (secondary incomplete) (OR 2.92; 95 % CI 1.40, 6.12); and (4) decreasing maternal BMI (OR1 kg/m2 1.11; 95 % CI 1.02, 1.21). Risk factors for stunting were: (1) age (OR6-month 1.14; 95 % CI 1.02, 1.27) and (2) decreasing maternal height (OR1 cm 1.12; 95 % CI 1.06, 1.20). Overall, risk factors for malnutrition included both child and maternal determinants. Based on these data, locally appropriate and cost-effective dietary, de-worming and educational programmes should be targeted to mothers and preschool-age children.

Does birth spacing affect maternal or child nutritional status? A systematic literature review

This review addresses the question of whether a short birth interval is associated with adverse nutritional outcomes for the mother or the child. Indices of anthropometric status (maternal weight or body mass index; child growth) and micronutrient status (e.g. iron or vitamin A) were included as outcomes. A computerized search of all relevant papers published since 1966 was completed, and the 'snowball' method was used to identify additional relevant published or unpublished papers. In total, 57 papers were found to contain data regarding the relationship between birth spacing and nutritional outcomes (35 for child nutrition, 11 for maternal anthropometric status, and 11 for maternal anaemia or micronutrient status). Of these, 23 papers were excluded from further consideration because they did not include any multivariate analysis, leaving 34 papers that met the criteria for the review (22 for child nutrition, eight for maternal anthropometric status, and four for maternal anaemia or micronutrient status). The studies on child nutrition outcomes indicate that a longer birth interval is associated with a lower risk of malnutrition in some populations, but not all. In those countries in which the relationship was significant, the reduction in stunting associated with a previous birth interval >or=36 months ranged from approximately 10% to 50%. Some of this reduction may be due to residual confounding, i.e. to factors not included in the analysis (such as breastfeeding and maternal height). The studies on maternal anthropometric outcomes yielded mixed results. Because the nutritional burden on the mother between pregnancies depends on the extent of breastfeeding, the interpregnancy interval is not the best measure of whether the mother has had a chance to recover from the pregnancy, in terms of repleting her nutritional status. Therefore, some studies examined the 'recuperative interval' (duration of the non-pregnant, non-lactating interval) instead. Taken as a whole, the studies do not provide clear evidence of a link between interpregnancy or recuperative interval and maternal anthropometric status. This may be due, in part, to changes in the hormonal regulation of nutrient partitioning between the mother and the fetus when a mother is malnourished. Only four papers were identified that related to micronutrient status, three of which examined maternal anaemia. One study showed an increased risk for maternal anaemia when the interpregnancy interval was <6 months, but the analysis did not control for iron supplementation during pregnancy. The other two studies did not show a significant association between interpregnancy interval and maternal anaemia. One study of micronutrient status indicated no significant relationship between interpregnancy interval and maternal serum zinc, copper, magnesium, ferritin, folate or thyroid-stimulating hormone. Important methodological limitations were apparent in most of the studies. Thus, further research with more comprehensive control of potentially confounding variables is needed.

Estado nutricional e fatores associados à estatura de crianças da Terra Indígena Guarita, Sul do Brasil

O estado nutricional de crianças menores de cinco anos e fatores associados à estatura foram estudados usando dados de um programa para controle da desnutrição e mortalidade na Terra Indígena Guarita, Rio Grande do Sul, Brasil, 2001/2002. Índices antropométricos foram calculados em escores-z da referência CDC/2000. Na primeira avaliação pelo programa, 34,7%, das crianças apresentavam baixa estatura, 12,9% baixo peso para idade, 4,2% baixo peso para estatura e 8,7% sobrepeso. Baixa estatura foi mais prevalente em meninos e maiores de um ano. Modelos de regressão linear múltipla sugerem que a altura foi, em média, menor quando a água para alimentação era de fonte/poço/rio (p = 0,046), não havia geladeira para conservar alimentos (p = 0,021), a mãe era menor de 16 anos ao nascimento do mais velho entre os filhos menores de cinco anos (p = 0,019) e analfabeta (p = 0,083). O destino dos dejetos evidenciou efeito apenas no modelo bruto. Não houve evidência de efeito do número de filhos menores de cinco anos. Políticas de inclusão social e provisão de recursos sociais e de saúde são potencialmente relevantes para a saúde e nutrição nessa população.