RESUMO

OBJECTIVE: To examine associations between weight and head circumference (HC) changes and neurodevelopment in preterm infants. STUDY DESIGN: This retrospective cohort study of Canadian Neonatal Network and Canadian Neonatal Follow-Up Network sites included preterm infants born 2010-2018. Logistic regression and model diagnostics evaluated relationships between changes in z score and velocity of weight and HC from birth to discharge from a tertiary neonatal intensive care unit, discharge to 18-24 months corrected age (CA), and birth to 18-24 months CA and significant cognitive/motor impairment at 18-24 months CA classified using a Bayley Scales of Infant and Toddler Development-Third Edition cognitive or motor composite score <70. RESULTS: In total, 4530 infants (53.0% male) with a mean (SD) gestational age of 26.3 (1.4) weeks and birth weight of 920 (227) g were included. Weight and HC changes were associated with lower odds of significant cognitive/motor impairment including an OR of 0.87 (95% CI: 0.83, 0.91; P < .001) for a 1-g/d increase in weight from discharge to 18-24 months CA and 0.81 (95% CI: 0.75, 0.88; P < .001) for a 1-unit increase in HC z score from birth to 18-24 months CA. Associations were not statistically significant in morbidity-free neonates. Weight and HC gains poorly discriminated between infants with and without significant cognitive/motor impairment (areas under the receiver operating characteristic curve of <0.64). No growth measure had a clinically useful balance of sensitivity and specificity. CONCLUSIONS: Weight and HC changes were associated with significant cognitive/motor impairment but had poor discriminatory capability. Neonatal morbidities may make a larger contribution than postnatal growth to neurodevelopment.

Assuntos

Desenvolvimento Infantil , Recém-Nascido Prematuro , Lactente , Recém-Nascido , Humanos , Masculino , Gravidez , Feminino , Idade Gestacional , Estudos Retrospectivos , Canadá/epidemiologia

RESUMO

OBJECTIVE: To evaluate the relationship between the timing of infant cereal introduction between 4 and 6 months of age and growth and dietary intake in later childhood. STUDY DESIGN: A longitudinal cohort study was conducted among healthy children 0-10 years of age participating in The Applied Research Group for Kids cohort study between June 2008 and August 2019 in Toronto, Canada. RESULTS: Of 8943 children included, the mean (SD) age of infant cereal introduction was 5.7 (2.1) months. In the primary analysis, children who were introduced to infant cereal at 4 vs 6 months had 0.17 greater body mass index z score (95% CI 0.06-0.28; P = .002) and greater odds of obesity (OR 1.82; 95% CI 1.18-2.80; P = .006) at 10 years of age. In the secondary analysis, children who were introduced to infant cereal at 4 vs 6 months had 0.09 greater height-for-age z score (95% CI 0.04-0.15; P = .002) at 1 year of age, an association that was not observed at 5 or 10 years of age. Children who were introduced to infant cereal at 4 vs 6 months had greater nutrition risk which was primarily determined by a less-favorable eating behavior score at 18 months to 5 years of age (0.18 units higher; 95% CI 0.07-0.29; P = .001). CONCLUSIONS: Introduction of infant cereal at 4 vs 6 months was associated with greater body mass index z score, greater odds of obesity, similar height-for-age z score, and less favorable eating behavior. These findings support recommendations for introducing solid food around 6 months of age.

Assuntos

Desenvolvimento Infantil , Grão Comestível , Alimentos Infantis , Fatores Etários , Estatura , Índice de Massa Corporal , Criança , Pré-Escolar , Estudos de Coortes , Comportamento Alimentar , Feminino , Humanos , Lactente , Estudos Longitudinais , Masculino , Obesidade Infantil/epidemiologia , Estudos de Amostragem

RESUMO

OBJECTIVES: To determine the association between cow's milk-fat and non-high-density lipoprotein (non-HDL) cholesterol, a marker of cardiovascular disease (CVD) risk in young children, and whether this association is mediated by the typical volume of cow's milk consumed. STUDY DESIGN: A longitudinal study in 2- to 8-year-old children (n = 2890) was conducted through The Applied Research Group for Kids (TARGet Kids!), a practice-based research network in Toronto, Canada. Generalized estimating equations were used to examine the relationship between parent-reported cow's milk-fat percentage intake and serum non-HDL cholesterol concentrations as well as having high non-HDL cholesterol (≥3.75 mmol/L [145 mg/dL]), adjusting for covariates including age, sex, body mass index z score, breastfeeding duration, mother's ethnicity, and parental history of CVD. Bootstrap resampling (10 000 repetitions) was used to assess whether typical volume consumed mediated the association between cow's milk-fat percentage and non-HDL cholesterol. RESULTS: In total, 156 (5.4%) had high non-HDL cholesterol. Each percent increase in cow's milk-fat was associated with a 0.035 mmol/L (1.35 mg/dL) (P < .001) and 0.024 mmol/L (0.92 mg/dL) (P = .01) increase in non-HDL cholesterol, unadjusted and adjusted for covariates respectively. Cow's milk-fat percentage was not associated with greater odds of having high non-HDL cholesterol. Volume of cow's milk partially mediated the association between cow's milk-fat percentage and non-HDL cholesterol, accounting for 28% of the relationship (P < .001). CONCLUSIONS: Consumption of higher-fat cow's milk was associated with a small increase in non-HDL cholesterol but not greater odds of having high non-HDL cholesterol. Further research is needed to assess this relationship with other CVD risk factors in young children. TRIAL REGISTRATION: ClinicalTrials.gov: NCT01869530.

Assuntos

Doenças Cardiovasculares/sangue , Colesterol/sangue , Gorduras na Dieta/administração & dosagem , Lipoproteínas/sangue , Leite/efeitos adversos , Animais , Índice de Massa Corporal , Aleitamento Materno , Canadá/epidemiologia , Doenças Cardiovasculares/epidemiologia , Sistema Cardiovascular , Bovinos , Criança , Pré-Escolar , Coleta de Dados , Gorduras na Dieta/efeitos adversos , Feminino , Humanos , Estudos Longitudinais , Masculino , Leite/química , Atenção Primária à Saúde , Fatores de Risco , Resultado do Tratamento

RESUMO

Early nutritional support of preterm infants is critical to life-long health and well being. Numerous studies have demonstrated that preterm infants are at increased risk of mortality and morbidity, including disturbances in brain development. To date, much attention has focused on enhancing the nutritional support of very low and extremely low birth weight infants to improve survival and quality of life. In most countries, preterm infants are sent home before their expected date of term birth for economic or other reasons. It is debatable whether these newborns require special nutritional regimens or discharge formulas. Furthermore, guidelines that specify how to feed very preterm infants after hospital discharge are scarce and conflicting. On the other hand, the late-preterm infant presents a challenge to health care providers immediately after birth when decisions must be made about how and where to care for these newborns. Considering these infants as well babies may place them at a disadvantage. Late-preterm infants have unique and often-unrecognized medical vulnerabilities and nutritional needs that predispose them to greater rates of morbidity and hospital readmissions. Poor or inadequate feeding during hospitalization may be one of the main reasons why late-preterm infants have difficulty gaining weight right after birth. Providing optimal nutritional support to late premature infants may improve survival and quality of life as it does for very preterm infants. In this work, we present a review of the literature and provide separate recommendations for the care and feeding of late-preterm infants and very preterm infants after discharge. We identify gaps in current knowledge as well as priorities for future research.

Assuntos

Cuidado do Lactente/métodos , Fenômenos Fisiológicos da Nutrição do Lactente , Recém-Nascido Prematuro/fisiologia , Necessidades Nutricionais/fisiologia , Alta do Paciente , Desenvolvimento Infantil/fisiologia , Suplementos Nutricionais , Alimentos Fortificados , Idade Gestacional , Gráficos de Crescimento , Humanos , Fórmulas Infantis , Recém-Nascido , Doenças do Prematuro/prevenção & controle , Desnutrição/prevenção & controle , Leite Humano , Avaliação Nutricional , Estado Nutricional , Readmissão do Paciente

RESUMO

Breast milk reduces the incidence of necrotizing enterocolitis (NEC). BH4 is a cofactor for endothelial NOS (eNOS). Reduced BH4 levels, or its oxidation to dihydrobiopterin (BH2), uncouple eNOS resulting in formation of reactive oxygen species (ROS) that have been implicated in the pathogenesis of NEC. We evaluated colostrum and mature breast milk, as well as infant formula, BH4 and BH2 content. In addition, we tested the BH4 effect on the newborn rat mesenteric arterial vascular tone. BH4 and BH2 content increased 3-fold in mature breast milk, when compared with colostrum (p < 0.01), without a change in their ratio. Infant formula had a negligible BH4 content and lower biopterins ratio, when compared with breast milk. eNOS is the predominant synthase isoform in newborn rat mesenteric arteries. In the presence of BH4, mesenteric arteries contracted less to thromboxane A2 analog U46619 (p < 0.01) and this effect was abolished following eNOS inhibition. BH4 (10⁻6 M) vasorelaxed the newborn rat mesenteric arteries. We conclude that when compared with infant formula, breast milk has a high BH4 content that increases as breastfeeding continues. Given its mesenteric arterial vasorelaxing effect, BH4 may play an important role in the reduced NEC incidence among breast fed infants.

Assuntos

Animais Recém-Nascidos/anatomia & histologia , Biopterinas/análogos & derivados , Artérias Mesentéricas/efeitos dos fármacos , Leite Humano/química , Vasodilatação/efeitos dos fármacos , Animais , Biopterinas/química , Biopterinas/farmacologia , Bovinos , Cromatografia Líquida , Enterocolite Necrosante/patologia , Enterocolite Necrosante/prevenção & controle , Feminino , Humanos , Fórmulas Infantis/química , Isoenzimas/metabolismo , Óxido Nítrico Sintase/metabolismo , Período Pós-Parto , Ratos , Ratos Sprague-Dawley , Espectrometria de Massas em Tandem

RESUMO

Data from the menu ordering system was used to calculate servings/child/day of food groups ordered by pediatric inpatients. The children ordered a mean of 5.0 +/- 0.56 servings of fruits and vegetables/day, which decreased to 3.5 +/- 0.27 servings when juice was removed. "Foods-to-limit" were ordered 3.8 +/- 0.31 times/day. Interventions to improve healthier choices are warranted.

Assuntos

Inquéritos sobre Dietas , Ingestão de Alimentos/psicologia , Comportamento Alimentar/fisiologia , Alimentos/estatística & dados numéricos , Pacientes Internados , Seguimentos , Humanos , Lactente , Política Nutricional , Ontário , Estudos Retrospectivos , Inquéritos e Questionários

RESUMO

The purpose of this study was to examine whether maternal iron and/or folate status influences human milk folate secretion and is responsible for growth faltering of Otomi infants in Capulhuac, Mexico. Breast-feeding mothers (n = 71) were randomized at 22 +/- 13 d (baseline) postpartum to receive a daily multivitamin supplement containing folic acid (400 microg) with and without iron (18 mg). Mothers provided blood and milk samples at baseline, and at 82 +/- 15 and 138 +/- 18 d postpartum. Iron supplementation significantly improved hematocrit and transferrin receptor concentrations but had no influence on maternal folate status or milk folate or iron concentrations. Forty-three percent of mothers (29/68) had low blood folate concentrations at baseline, whereas only 6% (4/66) had low blood folate concentrations at approximately 138 d postpartum. Milk folate concentrations did not differ between Fe-deficient and Fe-sufficient women and provided adequate levels of dietary folate by approximately 82 d postpartum. While milk iron concentrations were unrelated to maternal iron status, they decreased during lactation, and, by approximately 138 d, they provided only 55% of the current recommendation. In conclusion, milk folate concentrations appear to be well preserved during maternal iron deficiency; hence, faltering growth among infants in Capulhuac, Mexico is unlikely the result of reduced milk folate concentration secondary to maternal Fe deficiency. However, milk Fe concentrations showed a temporal decline. Whether the disjuncture between recommended and actual Fe intakes among infants born with low Fe reserves and weaned to foods low in bioavailable Fe has functional consequences is worthy of further investigation.

Assuntos

Anemia Ferropriva/metabolismo , Ácido Fólico/metabolismo , Leite Humano/metabolismo , Disponibilidade Biológica , Aleitamento Materno , Dieta , Suplementos Nutricionais , Ingestão de Energia , Feminino , Ácido Fólico/administração & dosagem , Ácido Fólico/sangue , Hematócrito , Humanos , Ferro/análise , Ferro da Dieta/administração & dosagem , Lactação , Fenômenos Fisiológicos da Nutrição Materna , México , Leite Humano/química , Estado Nutricional , Período Pós-Parto , Receptores da Transferrina/sangue , Vitaminas/administração & dosagem

RESUMO

The purpose of this study was to investigate the usefulness of soluble serum transferrin receptor (TfR) concentration, TfR index and log TfR:ferritin ratio (TfR outcomes) in detecting tissue Fe deficiency among breast-feeding Otomi women residing in Capulhuac, Mexico (2800 m above sea level) and to determine whether folate deficiency modifies the interpretation of these data. Lactating women (n = 68) provided blood samples at 22 +/- 13 d (mean +/- SD) postpartum. Using the 3-index Fe assessment model with and without Hb, 2 women (3%) had Fe-deficient erythropoiesis, 24 (36%) Fe deficiency anemia, and 19 (29%) indeterminate Fe status; 29 (43%) and 5 (7.5%) women had plasma and erythrocyte folate concentrations below normative cutoff values, respectively. Mean values for TfR outcomes were higher among women classified as Fe deficient than those who were Fe sufficient, but did not differ with low or normal blood folate concentrations. Similarly, TfR outcomes did not differ among women with normocytic or macrocytic erythrocytes. Receiver-operating characteristic (ROC) curves generated for TfR outcomes yielded areas under the curve from 0.62 to 0.68, indicating that each of these measures, on its own, is a poor predictor of tissue Fe deficiency in lactating women. In conclusion, low blood folate concentrations or the presence of macrocytosis in Otomi women from Capulhuac, Mexico (moderate altitude) did not influence the utility of TfR outcomes for the detection of Fe deficiency during early lactation. Further, on their own, TfR, TfR index, and TfR:ferritin ratio were poor predictors of tissue Fe deficiency for any given individual.

Assuntos

Deficiência de Ácido Fólico/sangue , Deficiências de Ferro , Lactação/fisiologia , Receptores da Transferrina/sangue , Coleta de Amostras Sanguíneas/métodos , Eritrócitos/metabolismo , Feminino , Ácido Fólico/sangue , Hematócrito , Humanos , Ferro/sangue , México

RESUMO

BACKGROUND: We were interested in identifying possible nutritional reasons for growth faltering among breastfed infants in the rural farming community of San Mateo, Capulhuac, Mexico (2800 m above sea level). OBJECTIVE: We examined the prevalence of inadequate iron and folate status among lactating Otomi women and determined to what extent their iron and folate nutriture influenced the milk concentrations of these nutrients. DESIGN: Lactating women (n = 71) provided blood and milk samples and dietary information at a mean (+/- SD) of 22 +/- 13 d postpartum. Blood indexes included hemoglobin, hematocrit, serum iron, total-iron-binding capacity, ferritin, transferrin receptor, mean cell volume, plasma folate, and erythrocyte folate. RESULTS: Approximately 62% and 58% of the women had nutritional anemia defined as a hemoglobin concentration

Assuntos

Dieta , Ácido Fólico/metabolismo , Ferro , Lactação , Leite Humano/química , Adolescente , Adulto , Antropometria , Feminino , Ácido Fólico/administração & dosagem , Deficiência de Ácido Fólico/sangue , Deficiência de Ácido Fólico/epidemiologia , Humanos , Lactente , Recém-Nascido , Ferro/administração & dosagem , Ferro/metabolismo , Deficiências de Ferro , México/epidemiologia , Estado Nutricional , População Rural