Browsing by Author "Moreira, AC"
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- Evolution of Resting Energy Expenditure, Respiratory Quotient, and Adiposity in Infants Recovering from Corrective Surgery of Major Congenital Gastrointestinal Tract Anomalies: A Cohort StudyPublication . Pereira-da-Silva, L; Barradas, S; Moreira, AC; Alves, M; Papoila, AL; Virella, D; Cordeiro-Ferreira, GThis cohort study describes the evolution of resting energy expenditure (REE), respiratory quotient (RQ), and adiposity in infants recovering from corrective surgery of major congenital gastrointestinal tract anomalies. Energy and macronutrient intakes were assessed. The REE and RQ were assessed by indirect calorimetry, and fat mass index (FMI) was assessed by air displacement plethysmography. Longitudinal variations over time are described. Explanatory models for REE, RQ, and adiposity were obtained by multiple linear regression analysis. Twenty-nine infants were included, 15 born preterm and 14 at term, with median gestational age of 35.3 and 38.1 weeks and birth weight of 2304 g and 2935 g, respectively. In preterm infants, median REE varied between 55.7 and 67.4 Kcal/kg/d and median RQ increased from 0.70 to 0.86-0.92. In term infants, median REE varied between 57.3 and 67.9 Kcal/kg/d and median RQ increased from 0.63 to 0.84-0.88. Weight gain velocity was slower in term than preterm infants. FMI, assessed in a subset of 15 infants, varied between a median of 1.7 and 1.8 kg/m2 at term age. This low adiposity may be related to poor energy balance, low fat intakes, and low RQ¸ that were frequently recorded in several follow-up periods.
- The Effect of Long-Chain Polyunsaturated Fatty Acids Intake During Pregnancy on Adiposity of Healthy Full-Term Offspring at BirthPublication . Pereira-da-Silva, L; Cabo, C; Moreira, AC; Papoila, AL; Virella, D; Neves, R; Bridges, KM; Cordeiro-Ferreira, GOBJECTIVE: The adjusted effect of long-chain polyunsaturated fatty acid (LCPUFA) intake during pregnancy on adiposity at birth of healthy full-term appropriate-for-gestational age neonates was evaluated. STUDY DESIGN: In a cross-sectional convenience sample of 100 mother and infant dyads, LCPUFA intake during pregnancy was assessed by food frequency questionnaire with nutrient intake calculated using Food Processor Plus. Linear regression models for neonatal body composition measurements, assessed by air displacement plethysmography and anthropometry, were adjusted for maternal LCPUFA intakes, energy and macronutrient intakes, prepregnancy body mass index and gestational weight gain. RESULT: Positive associations between maternal docosahexaenoic acid intake and ponderal index in male offspring (β=0.165; 95% confidence interval (CI): 0.031-0.299; P=0.017), and between n-6:n-3 LCPUFA ratio intake and fat mass (β=0.021; 95% CI: 0.002-0.041; P=0.034) and percentage of fat mass (β=0.636; 95% CI: 0.125-1.147; P=0.016) in female offspring were found. CONCLUSION: Using a reliable validated method to assess body composition, adjusted positive associations between maternal docosahexaenoic acid intake and birth size in male offspring and between n-6:n-3 LCPUFA ratio intake and adiposity in female offspring were found, suggesting that maternal LCPUFA intake strongly influences fetal body composition.
- Valores de Referência de Robustez Óssea: Avaliados Próximo ao Nascimento por Ultrassonografia Quantitativa em Recém-Nascidos de Termo e Pré-TermoPublication . Pereira-da-Silva, L; Brito Costa, A; Pereira, L; Filipe, AF; Virella, D; Moreira, AC; Mendes, L; Serelha, MObjectivo: Estabelecer valores de referência da robustez óssea nos primeiros dias de vida, em recém-nascidos de termo e pré-termo adequados para a idade de gestação nascidos em Portugal. Métodos: Foi medida a velocidade do som (VdS) (m/s) por ultrassonografia quantitativa, numa amostra sistemática de recém-nascidos adequados para a idade de gestação, de termo e pré-termo, respectivamente nos primeiros dois e cinco dias após o nascimento. Foi avaliada a homogeneidade de valores entre géneros e entre grupos de idade de gestação. Resultados: A amostra constou de 158 recém-nascidos, 34 de termo e 124 pré-termo (idade de gestação entre 26 a 41 semanas), com peso de nascimento de 595 g a 4195 g, 84 do sexo masculino (53,2%) e 20 gémeos (10,8%). A média da VdS aumenta significativamente com a idade de gestação. São providenciados valores de referência da VdS para os percentis 10, 25, 50, 75 e 90, para grupos de idade de gestação, sem distinção para o género. Conclusão: São disponibilizados valores de referência de VdS nos primeiros dias de vida, de recém-nascidos adequados para a idade de gestação, de termo e pré-termo, nascidos em Portugal. Estes valores reflectem a robustez óssea intrauterina e servem de referência basal para estudos evolutivos realizados em Portugal.