Lower Body Mass Index Z-score Research Articles

Case-control study of heart rate variability and sleep apnea in childhood sickle cell disease.

Obstructive sleep apnea (OSA) is common in sickle cell disease (SCD) despite the absence of overweight, suggesting a specific pathophysiology. We previously showed that otherwise healthy children with increased pharyngeal compliance, a main endotype of OSA, exhibited decreased sympathetic modulation. Our objective was to assess whether modifications of heart rate variability (HRV) and compliance are associated in SCD. Cases (children with SCD, African or Caribbean ethnicity) and controls (otherwise healthy children, same ethnicity), aged 4-18 years, were selected from our database of children referred for OSA and matched for sex, age, and obstructive apnea-hypopnoea index (OAHI) score. The children underwent polysomnography and acoustic pharyngometry (to compute compliance). HRV analyses were performed from 5 min ECG recordings in wakeful, NREM, and REM sleep states and from the whole night. Twenty-one pairs were analysed (median age 10.5 years, 24 girls). Children with SCD had lower BMI z-scores and more tonsil hypertrophy than control children. Children with SCD and OSA (OAHI ≥2/hour) were characterised by lower compliance than children with SCD without OSA. An inverse relationship between compliance and SD2 (HRV from whole night, inversely related to sympathetic modulation) was evidenced (negative relationship in SCD: R = -0.63, p = 0.002 vs. positive relationship in controls R = 0.59, p = 0.006). In conclusion, while the decrease in sympathetic modulation in control children may contribute to increasing pharyngeal compliance, its decrease seems protective in children with sickle cell disease, which underlines the specificity of OSAS pathophysiology in SCD that could be due to sickle cell disease related smooth muscle dystonia.

Sibship Composition and BMI Z-Score Among Saudi Preschoolers: A Cross-Sectional Study.

Background and objective The association between sibship composition and child body mass index (BMI) has not been investigated in any Arab/Middle Eastern populations. In light of this, this study aimed to examine the association of the number of siblings, number of older siblings, and number of younger siblings with child BMI z-score (BMIz) among preschoolers in the Kingdom of Saudi Arabia (KSA). Methods A total of 209 mothers and their children were recruited from preschools in Jeddah, KSA. Mothers reported their responses to the study questionnaire via telephone. Child anthropometry was objectively measured; BMIz was calculated based on age- and sex-specific World Health Organization (WHO) growth standards and reference data. We used hierarchical multiple linear regression to examine the association between sibship composition variables and child BMIz, independent of the effect of potential confounders, and to evaluate changes in model fit. Results The number of siblings was negatively associated with child BMIz [b = -0.18, 95% confidence interval (CI) = -0.35, -0.06, p<0.01, adjusted R2= 0.16]. There was a negative association between the number of older siblings and child BMIz (b = -0.23, 95% CI = -0.38, -0.11, p<0.01, adjusted R2= 0.21) as well as between the number of older sisters and child BMIz (b = -0.18, 95% CI = -0.52, -0.09, p<0.01, adjusted R2= 0.19). However, there were no significant associations between the number of older brothers or the number of younger siblings and child BMIz. Conclusions Based on our findings, sibship composition was found to be associated with BMIz among a sample of preschoolers in KSA. More research is needed to further establish this association and to understand the underlying mechanism of the association of the greater number of older siblings and older sisters with lower BMIz.

Estimating effects of longitudinal and cumulative exposure to PFAS mixtures on early adolescent body composition.

Few methods have been used to characterize repeatedly measured biomarkers of chemical mixtures. We applied latent profile analysis (LPA) to serum concentrations of 4 perfluoroalkyl and polyfluoroalkyl substances (PFAS) measured at 4 time points from gestation to age 12years. We evaluated the relationships between profiles and z scores of height, body mass index, fat mass index, and lean body mass index at age 12years (n=218). We compared LPA findings with an alternative approach for cumulative PFAS mixtures using g-computation to estimate the effect of simultaneously increasing the area under the receiver operating characteristic curve (AUC) for all PFAS. We identified 2 profiles: a higher PFAS profile (35% of sample) and a lower PFAS profile (relative to each other), based on their average PFAS concentrations at all time points. The higher PFAS profile had generally lower z scores for all outcomes, with somewhat larger effects for males, though all 95% CIs crossed the null. For example, the higher PFAS profile was associated with a 0.50-unit lower (β = -0.50; 95% CI, -1.07 to 0.08) BMI z score among males but not among females (β = 0.04; 95% CI, -0.45 to 0.54). We observed similar patterns with AUCs. We found that a higher childhood PFAS profile and higher cumulative PFAS mixtures may be associated with altered growth in early adolescence. This article is part of a Special Collection on Environmental Epidemiology.

Infant feeding practices and risk of preschool obesity in AlAin, UAE: A cross-sectional study

Early childhood obesity is serious public health problem, and poses a risk of obesity in later life. The study aimed to investigate whether infant feeding affects risk of overweight and obesity in preschool children in the United Arab Emirates (UAE). A cross-sectional study was carried out. Data was collected in a kindergarten in Al Ain, UAE. One hundred and fifty parents and preschool children aged 2 to 6 years participated in the study. Univariate and multivariate linear regression were used to investigate associations. A longer duration of breastfeeding and later introduction of complementary foods were associated with a lower BMI z-score in preschool children. Each month of any breastfeeding was associated with a lower BMI z-score in the unadjusted model (β = -0.03; 95% CI -0.05, -0.01; p = 0.01), and each month increase in the age of introducing complementary foods was associated with a lower BMI z-score in the unadjusted model (β = -0.43; 95% CI: -0.60 to—0.027; p&lt;0.001). These associations remained after adjustment for potential confounding factors (age, sex, maternal BMI, maternal education level, mother’s age, social class, father’s BMI) for duration of breastfeedinig (β = -0.02; 95% CI: -0.05 to 0.00; p&lt;0.001) and age of complementary feeding (β = -0.39; 95% CI: -0.57 to—0.21; p&lt;0.001). Poor infant feeding practices (shorter duration of breastfeedinig and early introduction of complementary foods) were found to be associated with higher BMI in preschool children. Promoting appropriate proper infant feeding practices in line with recommendations could be one strategy to help prevent childhood obesity in the UAE.

Underweight in the first 2 years of life and nutrition risk in later childhood: a prospective cohort study.

Children with underweight in the first 2 years have lower body mass index z-score (zBMI) and height-for-age z-score (HAZ) in later childhood. It is not known if underweight in the first 2 years is associated with nutrition risk in later childhood. (1) Determine the relationship between underweight (zBMI < -2) in the first 2 years and nutrition risk measured by the Nutrition Screening for Toddlers and Preschoolers (NutriSTEP) score from 18 months to 5 years. (2) Explore the relationship between underweight in the first 2 years and the NutriSTEP subscores for eating behaviours and dietary intake from 18 months to 5 years. This was a prospective study, including healthy full-term children in Canada aged 0-5 years. zBMI was calculated using measured heights and weights and the WHO growth standards. NutriSTEP score was measured using a parent-completed survey and ranged from 0 to 68. Nutrition risk was defined as a score ≥21. Linear mixed effects models were used. Four thousand nine hundred twenty-nine children were included in this study. At enrolment, 51.9% of participants were male. The prevalence of underweight children was 8.8%. Underweight in the first 2 years was associated with higher NutriSTEP (0.79, 95% CI: 0.29,1.29), higher eating behaviour subscore (0.24, 95% CI: 0.03, 0.46) at 3 years and higher odds of nutrition risk (OR: 1.39, 95% CI: 1.07,1.82) at 5 years. Children with underweight in the first 2 years had higher nutrition risk in later childhood. Further research is needed to understand the factors which influence these relationships.

Association between gut microbiota at 3.5 years of age and body mass index at 5 years: results from two French nationwide birth cohorts.

The relationship between gut microbiota and changes in body mass index (BMI) or pediatric overweight in early life remains unclear, and information regarding the preterm population is scarce. This study aimed to investigate how the gut microbiota at 3.5 years of age is associated with (1) later BMI at 5 years, and (2) BMI z-score variations between 2 and 5 years in children from two French nationwide birth cohorts. Bacterial 16S rRNA gene sequencing was performed to profile the gut microbiota at 3.5 years of age in preterm children (n = 143, EPIPAGE 2 cohort) and late preterm/full-term children (n = 369, ELFE cohort). The predicted abundances of metabolic functions were computed using PICRUSt2. Anthropometric measurements were collected at 2 and 5 years of age during medical examinations or retrieved from children's health records. Statistical analyses included multivariable linear and logistic regressions, random forest variable selection, and MiRKAT. The Firmicutes to Bacteroidetes (F/B) ratio at 3.5 years was positively associated with the BMI z-score at 5 years. Several genera were positively ([Eubacterium] hallii group, Fusicatenibacter, and [Eubacterium] ventriosum group) or negatively (Eggerthella, Colidextribacter, and Ruminococcaceae CAG-352) associated with the BMI z-scores at 5 years. Some genera were also associated with variations in the BMI z-scores between 2 and 5 years of age. Predicted metabolic functions, including steroid hormone biosynthesis, biotin metabolism, glycosaminoglycan degradation, and amino sugar and nucleotide sugar metabolism, were associated with lower BMI z-scores at 5 years. The unsaturated fatty acids biosynthesis pathway was associated with higher BMI z-scores. These findings indicate that the gut microbiota at 3.5 years is associated with later BMI during childhood, independent of preterm or term birth, suggesting that changes in the gut microbiota that may predispose to adult obesity begin in early childhood.

The Importance of Screening for Food Insecurity in Children with Sickle Cell Anemia: An Ancillary Study to the Severe Acute Malnutrition Feasibility Trial in Nigeria

Introduction Household food insecurity-lacking access to, or having uncertain access to, food that meets a person's dietary needs-is a longstanding problem in Nigeria that has continued to worsen in recent years. One of its most severe consequences is malnutrition, particularly affecting children due to their high nutrient demand coupled with higher energy expenditure. Even in high-income countries, such as the United States, many children with sickle cell anemia have lower weights and heights than their healthy peers. Due to their elevated nutrient requirements, children with sickle cell anemia may be at an even greater risk of malnutrition when faced with limited access to adequate food. The relationship between childhood food insecurity and malnutrition has been previously studied in younger children in Nigeria, but rarely in older children, and to our knowledge, never in older children with sickle cell anemia. We tested the hypothesis that there is a direct association between increased food insecurity and more severe malnutrition (lower body mass index [BMI] z-score) in older children with sickle cell anemia in Nigeria. Methods This was a planned analysis of the data of children enrolled in a feasibility trial for managing severe acute malnutrition in older children with sickle cell anemia in Nigeria (SAMS trial; #NCT03634488). In this study, children 5-12 years old with sickle cell anemia and uncomplicated severe acute malnutrition (BMI z-score &amp;lt;-3.0) were randomly assigned to receive either supplemental ready-to-use therapeutic food (RUTF) only or RUTF combined with moderate fixed-dose hydroxyurea therapy for 12 weeks. Baseline anthropometric data were obtained for each participant. Upon enrollment in the trial, the participants' caregivers completed the US Household Food Security Survey Module (HFSSM). Using the eight questions in the childhood portion of this standardized survey, we categorized the participants into three food security statuses: food security (0-1), low food security (2-4), and very low food security (5-8). Childhood food security scores were also measured as a continuous variable on a scale of 0-8, with higher scores indicating greater food insecurity. We constructed a linear regression model to estimate the association between childhood food insecurity and baseline BMI z-score. Results Data were collected between August 2021 and May 2022. The median age of the 108 participants in the study was 10.3 years (IQR 8.8-11.5). Most participants had low (55%) or very low (34%) food security. BMI z-score was not associated with categorical food security status (p=0.108). However, higher food insecurity as a continuous variable was associated with a lower BMI z-score (Pearson correlation -0.23, p=0.015; Figure 1). In a multivariable linear regression with sex, age at study entry, total hemoglobin, employment status, and head of household educational status, the childhood food insecurity score was negatively associated with the BMI z-score (Beta coefficient = -.05, p=0.047). Conclusions Our study reveals a high prevalence of food insecurity among older children with sickle cell anemia in Nigeria. Moreover, children experiencing higher food insecurity also exhibited more severe malnutrition, as evidenced by their lower BMI z-scores. Based on these results, we have started implementing food insecurity assessment as routine medical care in children with sickle cell anemia at multiple clinics in northern Nigeria. Children experiencing higher levels of food insecurity are referred to nutritional counseling, where they receive guidance on locally available nutrient-dense foods and preparation strategies. Figure 1.The predicted baseline body mass index z-score with 95% confidence intervals based on childhood food insecurity scores from a linear regression model of the participants in the SAMS trial.

OR15-04 Accelerated Longitudinal Weight Gain Among Infants With In Utero COVID-19 Exposure

Abstract Disclosure: M.W. Ockene: None. S.C. Russo: None. H. Lee: None. C. Monthé-Drèze: None. T.L. Stanley: Consulting Fee; Self; RosVivo Therapeutics. Grant Recipient; Self; Pfizer, Inc. I.L. Ma: None. M. Toribio: None. L.L. Shook: None. S.K. Grinspoon: Consulting Fee; Self; Theratechnologies. A.G. Edlow: Consulting Fee; Self; Mirvie, Inc. Grant Recipient; Self; Merck. L.T. Fourman: Consulting Fee; Self; Amryt Pharmaceuticals. Grant Recipient; Self; Amryt Pharmaceuticals. Background: Since its initial outbreak in 2019, coronavirus disease 2019 (COVID-19) has led to unprecedented morbidity and mortality worldwide. Due to a high burden of infection among pregnant women, a novel population of children with in utero exposure to maternal COVID-19 has emerged for which health outcomes are largely unknown. Given the role of the intrauterine environment in shaping chronic disease risk over the life course through effects on fetal programming, there is a pressing need to delineate longitudinal growth patterns among infants born to mothers with COVID-19 during pregnancy. Methods: We conducted a longitudinal cohort study leveraging a prospectively-enrolled perinatal biorepository among 149 infants with in utero exposure to maternal COVID-19 and 127 unexposed controls. Weight, length, and BMI were abstracted from health records at 0, 2 (±0.5), 6 (±1), and 12 (±1) months and standardized using World Health Organization (WHO) growth charts. Linear mixed effect and linear regression models were used to examine differences in anthropometric z-score trajectories over the first year of life between groups. Analyses were adjusted for maternal age, ethnicity, parity, insurance type, and BMI as well as infant sex, birthdate, and breastfeeding. Our pre-specified primary endpoint was change in BMI z-score from birth to 12 months. Results: Infants with in utero COVID-19 exposure versus controls exhibited differential trajectories of weight and BMI, but not length, z-scores over the first year of life (study group x time interaction, P &amp;lt; 0.0001 for weight and BMI z-scores). Infants born to mothers with prenatal COVID-19 had lower BMI z-score at birth (effect size: -0.35, 95% CI, -0.66 to -0.03) and greater increase in BMI z-score from birth to 12 months (effect size: 0.53, 95% CI, 0.06 to 0.99). Change in BMI z-score was greater than the WHO population average of 0 within the exposed (P &amp;lt; 0.0001) but not the unexposed group. Birth weight z-score was found to mediate a significant proportion of the relationship between COVID-19 exposure and postnatal growth (estimate ± standard error, 32 ± 14%, P = 0.02). Conclusions: Infants with in utero exposure to maternal COVID-19 were found to exhibit lower birth weight and accelerated weight gain over the first year of life compared to their unexposed peers. The exaggerated growth trajectory observed in these children may be a catch-up response to a prenatal growth deficit. Lower birth weight and accelerated postnatal weight gain are established risk factors for obesity, abdominal adiposity, and cardiovascular disease later in life. Thus, children born to mothers with prenatal COVID-19 may be at heightened risk of long-term cardiometabolic complications and require close monitoring over the life course. Further studies are now needed to delineate cardiometabolic sequelae of in utero COVID-19 exposure among this emerging global population. Presentation: Friday, June 16, 2023

Attained body mass index among children attending rural outdoor or urban conventional kindergartens.

This study aimed to examine whether children in rural outdoor kindergartens had attained a lower body mass index z-score (BMIz) and were at lower risk of overweight after school entrance compared to children in urban conventional kindergartens. This is a longitudinal observational study of 1,544 children from outdoor kindergartens and 1,640 from conventional kindergartens. The mean age at kindergarten enrolment was 3.5 years (SD: 0.9) in the outdoor kindergartens and 3.6 years (SD: 1.0) in the conventional kindergartens. Anthropometry was measured after school entry by school health nurses when the children were 6 to 8 years old. Attained BMIz was included as the primary outcome. The risk of attaining overweight (including obesity) was included as a secondary outcome. Register-based information was available on potential confounding factors. Linear and logistic regression models were used to assess group differences in outcome measures. Our basic models, with information on outcome, kindergarten type, and birth weight showed a borderline statistically significantly lower attained BMIz (-0.07 [95% CI: -0.14, 0.00], P = 0.060) and a lower risk of overweight (adjusted risk ratio: 0.83 [95% CI: 0.72, 0.97], P = 0.016) among children attending outdoor kindergartens. However, when adjusting for sociodemographic factors and parental BMI, there was no evidence of differences in attained BMIz (P = 0.153) or overweight (P = 0.967). When considering confounding factors, our findings indicate no differences in attained BMIz or risk of overweight after school entry among children attending rural outdoor kindergartens compared to those attending urban conventional kindergartens.

Relationships between dental fluorosis and fluoride concentrations in bottled water and groundwater in low-income children in Mexico.

The aim of the current study was to investigate associations between dental fluorosis in children living in low socioeconomic areas in Mexico, and fluoride concentrations in tap water, fluoride concentrations and in bottled water, and body mass index (BMI). A cross-sectional study involving 585 schoolchildren aged 8-12 years was conducted in communities in a southern state of Mexico with >0.7 parts per million (ppm) fluoride in the groundwater. The Thylstrup and Fejerskov index (TFI) was used to evaluate dental fluorosis, and the World Health Organization growth standards were used to calculate age-adjusted and sex-adjusted BMI Z-scores. A BMI Z-score ≤ -1 SD was used as the cut-off point for thinness, and multiple logistic regression models for dental fluorosis (TFI ≥ 4) were constructed. The mean fluoride concentration in tap water was 1.39 ppm (SD 0.66), and the mean fluoride concentration in bottled water was 0.32 ppm (SD 0.23). Eighty-four children (14.39%) had a BMI Z-score ≤ -1 SD. More than half (56.1%) of the children presented with dental fluorosis in TFI categories ≥ 4. Children living in areas with higher fluoride concentrations in the tap water [odds ratio (OR) 1.57, p = 0.002] and bottled water (OR 3.03, p < .001) were more likely to have dental fluorosis in the severe categories (TFI ≥ 4). BMI Z-score was associated with the probability of dental fluorosis (TFI ≥ 4; OR 2.11, p < 0.001), and the effect size was 29.3%. A low BMI Z-score was associated with a higher prevalence of dental fluorosis in the severe category. Awareness of the fluoride concentrations in bottled water may help prevent dental fluorosis, particularly in children exposed to several high fluoride content sources. Children with a low BMI may be more vulnerable to dental fluorosis.

Accelerated Longitudinal Weight Gain Among Infants With In Utero COVID-19 Exposure.

Since the initial outbreak of coronavirus disease 2019 (COVID-19), a novel population of children with in utero exposure to maternal infection has emerged whose health outcomes are largely unknown. To compare longitudinal growth trajectories among infants with vs without in utero COVID-19 exposure. We conducted a longitudinal cohort study leveraging a prospectively enrolled perinatal biorepository among 149 infants with in utero COVID-19 exposure and 127 unexposed controls. Weight, length, and body mass index (BMI) were abstracted from health records at 0, 2, 6, and 12 months and standardized using World Health Organization growth charts. Analyses were adjusted for maternal age, ethnicity, parity, insurance, and BMI as well as infant sex, birthdate, and breastfeeding. Infants with in utero COVID-19 exposure vs controls exhibited differential trajectories of weight and BMI, but not length, z-score over the first year of life (study group × time interaction, P < .0001 for weight and BMI). Infants born to mothers with prenatal COVID-19 had lower BMI z-score at birth (effect size: -0.35, 95% CI -0.66 to -0.03) and greater gain in BMI z-score from birth to 12 months (effect size: 0.53, 95% CI 0.06 to 0.99). Birth weight z-score mediated a significant proportion of the relationship between COVID-19 exposure and postnatal growth (estimate ± SE, 32 ± 14%, P = .02). Infants with in utero COVID-19 exposure exhibited lower birth weight and accelerated weight gain in the first year of life, which may be harbingers of downstream cardiometabolic pathology. Further studies are needed to delineate cardiometabolic sequelae among this emerging global population.

Gestational weight gain in women with pre-pregnancy overweight or obesity and anthropometry of infants at birth.

To examine the association of gestational weight gain (GWG) among women with pre-pregnancy overweight or obesity with infant weight and BMI z-score at birth. This study is a secondary analysis of a randomized controlled trial including data from 208 infants at birth born by mothers with pre-pregnancy BMI between 28 and 45 kg/m2 who completed the APPROACH study (randomized to a high-protein low-glycemic index diet or a moderate-protein moderate-glycemic index diet). This analysis pooled the two diet treatment groups together and data were analyzed using a linear mixed model. Limiting GWG by 1 kg was associated with lower birthweight (-16 g, P = 0.003), BMI z-score (-0.03SD, P = 0.019), weight z-score (-0.03SD, P = 0.004), and infant abdominal circumference (-0.06 cm, P = 0.039). Infants born by mothers whose GWG was ≤9 kg weighed less (122 g, 95% CI: 6-249, P = 0.040), had similar BMI z-score (0.2SD, 95% CI: -0.06 to 0.55, P = 0.120), and lower incidence of emergency cesarean deliveries (11.5% vs. 23.1%, P = 0.044) compared to infants born by mothers whose GWG was >9 kg. When women were classified into GWG quartiles, women in Q1 (GWG range: -7.0 to 3.2 kg) gave birth to smaller infants (3,420 g, P = 0.015) with lower BMI z-score (-0.5SD, P = 0.041) than women in Q2 (3.3-7.1 kg), Q3 (7.2-10.9 kg) and Q4 (11.1-30.2 kg). Limiting GWG among women with pre-pregnancy overweight or obesity was associated with lower infant weight, BMI z-score, weight z-score, and abdominal circumference at birth. Moreover, GWG below the Institute of Medicine guideline of a maximum of 9 kg was associated with lower birthweight and fewer emergency cesarean deliveries.

Bone Mineral Density in Patients with Pediatric Inflammatory Bowel Disease Using Dual Energy X-Ray Absorptiometry.

Inflammatory bowel disease (IBD) is a chronic inflammatory immune-mediated condition that affects the gastrointestinal system and alters bone growth and bone mineral density (BMD). Here we aimed to study the prevalence and predictors of a low BMD in pediatric patients with IBD. This retrospective cross-sectional analytical study included pediatric patients with IBD in whom BMD was evaluated using dual energy X-ray absorptiometry of the total body and lumbar spine. Osteoporosis was defined as a BMD Z-score ≤-2, osteopenia as -2 to -1, and normal as >-1. Clinical and laboratory findings were compared between patients with and without osteoporosis. Of the 48 patients, 30 (62.5%) were males, 35 (72.9%) had Crohn's disease, and 13 (27.1%) had ulcerative colitis. The mean age at diagnosis was 9.9±2.8 years. The median age at the time of the BMD scans was 11.9 (interquartile range, 9.9-14.3) years. Total body BMD scans identified 13 (27.1%) and 16 (33.3%) patients with osteoporosis and osteopenia, respectively. Spinal BMD scans revealed that 17 (39.5%) and 14 (32.6%) patients had osteoporosis and osteopenia, respectively. A low body mass index (BMI) Z-score (p=0.038), ileocolonic disease location (p=0.008), and a low calcium level (p=0.008) were significant predictors of osteoporosis on the total body BMD scans. A low BMI Z-score (p=0.039), decreased hemoglobin level (p=0.018), low calcium level (p=0.033), and infliximab use (p=0.019) were significant predictors of osteoporosis on the spinal BMD scans. This study showed a high prevalence of low BMD among pediatric patients with IBD. A low BMI, ileocolonic disease location, low hemoglobin and calcium levels, and infliximab use were significantly associated with osteoporosis.

Effects of a parent-led childhood obesity management program for socioeconomically vulnerable families: A randomised controlled trial

Background There is little information on the effects of parent-led interventions on promoting obesity-specific parenting behaviours and reducing children’s obesity status among socioeconomically vulnerable families. Aim We examined the effects of a parent-led childhood obesity management program on parenting antecedent factors, parenting behaviours, children’s healthy lifestyle behaviours, and children’s obesity status, based on the Theory of Planned Behaviour framework. Methods A randomised controlled trial was conducted (Trial no. KCT0006351KCT0006351). The participants were 52 pairs of parents and their overweight/obese children who were enrolled in either one of the Dream Start Centres or Community Child Centres in Seoul, South Korea. They were randomly allocated into either the intervention group (n = 26) or the control group (n = 26). The intervention group received a 12-week program that consisted of multiple behavioural and environmental strategies implemented through four intervention modes including home visits. The primary outcome was parenting behaviour; secondary outcomes were parenting antecedent factors and children’s variables. Outcomes were measured at baseline and after 12 weeks. Findings Compared to the control group, the intervention group showed significantly higher overall scores of parenting behaviours with significantly increased levels of parenting antecedent factors, higher percentages of recommended fruit and vegetable intake and moderate physical activity (p < 0.05 for all), and lower body mass index z-scores among children (p < 0.001). Discussion and conclusion The parent-led childhood obesity management program may effectively improve parenting behaviours for promoting children’s healthy eating and activity behaviours and reducing children’s obesity status among socioeconomically vulnerable families.

Is small for gestational age status independently correlated with body composition during childhood?

This study aims to examine if small for gestation age (SGA) status is correlated with alterations in body composition at prepuberty, independently of other factors, comparing SGA-born children with appropriate for gestational age (AGA)-born children. We examined anthropometrics, waist circumference, body mass index (BMI), six skinfold thickness, and body composition using the method of bioelectrical impedance in 636 children aged 7 to 10 years. We also considered age, gender, birth mode, mother’s age, prepregnancy weight, weight gain during pregnancy, social status, parental BMI, type of feeding, and daily exercise. We examined 636 children at a mean age of 9 years: 106 SGA-born and 530 AGA-born children. SGA as compared to AGA-born children had a lower BMI z-score (0.26 ± 0.89 kg/cm2 vs 0.46 ± 0.84 kg/cm2, p < 0.050) and a lower lean mass, although that was not statistically significant (24.0 ± 6.6 kg vs 25.6 ± 6.4 kg, p < 0.100). SGA-born children presented no difference in waist circumference or fat mass in comparison to children born AGA. Logistic regression analysis revealed a strong independent negative association between SGA status and BMI (beta = − 2.33, OR = 0.70 p = 0.019) and SGA status and lean mass (beta = − 2.43, OR = 0.95 p = 0.010). Conclusion: Our findings suggest that SGA-born children had a lower BMI as compared to AGA-born subjects, whereas SGA status was negatively associated with BMI and lean mass.What is Known:• Deviant birth weight for gestation has been associated with an increased risk of childhood adiposity.• Evidence remains scarce on whether small for gestational age status affects body composition and obesity later in childhood.What is New:• Among school-aged children, small for gestational age subjects had a lower body mass index as compared to appropriate for gestational age counterparts, whereas small for gestational age status was negatively associated with body mass index and lean mass.• A meticulous observation is needed during childhood in children born with deviant birth weight.

Long-Term Outcome of Necrotizing Enterocolitis and Spontaneous Intestinal Perforation.

Necrotizing enterocolitis (NEC) and spontaneous intestinal perforation (SIP) are complications in preterm infants associated with high morbidity, mortality, impaired growth, and neurodevelopmental (ND) outcomes. Few studies have reported growth or ND outcomes of infants born extremely preterm with NEC/SIP beyond early childhood. Here, we compared anthropometric and ND outcomes, at 10 and 15 years, for children with medical NEC, surgical NEC, SIP, and neither NEC nor SIP. Participants from the prospective longitudinal extremely low gestational age newborns study were evaluated at ages 10 and 15 years for anthropometrics, neurocognition, attention-deficit/hyperactivity disorder, epilepsy, and gross motor function. At age 10 years, 889 children were followed-up (medical NEC = 138, surgical NEC = 33, SIP = 29, no NEC/SIP = 689), and 694 children were followed up-at 15 years. Children with medical NEC had similar weight, BMI, height, and head circumference compared with controls at both 10 and 15 years. At 15 years, children with surgical NEC had lower weight z-score (adjusted β: -0.75, 95% confidence interval [CI]: -1.25 to -0.25), lower BMI z-score (adjusted β: -0.55, 95% CI: -1.09 to -0.01), and lower height z-score (adjusted β: -0.65, 95% CI: -1.16 to -0.14). Children with SIP had lower weight and height z-scores at age 10 years when adjusted for sample attrition, but these differences were not significant when adjusted for confounders. We observed no differences in long-term ND outcomes. Surgical NEC- and SIP-associated growth impairment may persist through late childhood. ND outcomes among school-aged children born extremely preterm with any NEC or SIP are no different from children without NEC/SIP.

Reduced Consumption of Sugar-Sweetened Beverages Is Associated with Lower Body Mass Index Z-Score Gain among Chinese Schoolchildren.

To examine whether reducing sugar-sweetened beverage (SSB) consumption is associated with reduced body mass index z-score gain among Chinese schoolchildren in Nanjing, China, a randomized controlled trial (RCT) was conducted in four selected primary schools from September 2019 to September 2020. Students in the third grade in the Intervention Group received school-based and home-based interventions for two consecutive semesters to reduce SSB consumption, while two schools in the Control Group did not receive any interventions. Weight changes were expressed as body mass index (BMI) z-scores as standard deviations of the BMI distribution per age and sex group. Changes in SSB consumption before and after the interventions were categorized into Level-Up if it increased, Level-Same if it was maintained and Level-Down if it decreased. Multivariable linear regression models were used to explore the association of different levels of changes in SSB consumption pre- and post-intervention with the BMI z-score. Among 1633 participants who completed the trial, the mean age at baseline was 9.36 years (±0.48 SD).The median baseline BMI z-score was −0.24 (25th percentile −0.72; 75th percentile 0.58). After the intervention, the median BMI z-score increased by 0.06 (−0.17~0.37) in the Intervention Group and by 0.14 (−0.08~0.41) in the Control Group (p < 0.001). A higher increase in BMI was found in the Control Group than in the Intervention Group (1.20 vs. 0.94) during the 12-month period. Among participants whose parents’ educational attainment was above 9 years, the median BMI z-score increased by 0.07 (−0.17~0.37) in the Intervention Group and by 0.16 (−0.06~0.41) in the Control Group (p < 0.001). In a linear regression analysis adjusted for potential confounders, the BMI z-score decreased by 0.057 more in Level-Down than in Level-Up (95% CI: −0.103 to −0.012, p = 0.014). These results indicate that the decreased consumption of SSBs might have reduced the prevalence of overweight in schoolchildren in China, especially in students whose parents had high educational levels.

Feasibility of Fitbit Use in Adolescent Survivors of Pediatric Cancer: Who Consistently Uses It and for How Long?

Purpose: Wearable activity trackers with real-time feedback and goal-setting features are being incorporated into programs to increase physical activity among childhood cancer survivors. This analysis describes the adoption and use of a Fitbit® Flex™ among adolescent-aged survivors of childhood cancer without incentives, reminders, or interventions to encourage use. Procedures: Cancer survivors aged 13-18 and ≥2 years from therapy received a Fitbit Flex with instructions to wear it daily. Researchers downloaded participants' daily total steps and active minutes for 1 year. Participants were classified as consistent (≥5 days/week for >4 weeks during the first 12 weeks) or inconsistent users, and comparisons between user types were made. Longitudinal use of the Fitbit and participants' 1-year acceptability evaluations are described. Results: Overall, 67.1% (47/70) of survivors enrolled, and Fitbit data were available for 36 participants. Initially, 30.6% (11/36) were consistent users. Consistent users had lower body mass index z-scores at enrollment (0.4 ± 0.7 vs. 1.2 ± 0.9; p = 0.01), but were otherwise comparable with inconsistent users. Over time survivors' use declined; at 12 months, only one participant was using his or her Fitbit. Survivors who completed a survey (n = 22) reported their Fitbit helped them self-monitor their exercise (72.7%, 16/22) and lead a more active lifestyle (63.6%, 14/22), but found it challenging to charge and not lose, forget about, or break the device. Conclusions: In the real-world setting, only a small subset of adolescent-aged survivors will initially consistently use a Fitbit and their interest diminishes over time. To maximize engagement, interventions incorporating wearable activity trackers likely need to include additional behavior change strategies.

Street-View Greenspace Exposure and Measured Adiposity in Early Adolescence

Background and Aim: Research on greenspace and adiposity in adolescents is dominated by satellite-derived exposure measures and self-reported adiposity. Google Street View (GSV) images measure ground-level specific greenspace exposures, which may better capture pathways linking greenspace to adiposity. We examined GSV-based greenspace assessed in childhood and adolescence and research-measures of adiposity in adolescence in Project Viva, a cohort in eastern Massachusetts participating in the Environmental influences on Child Health Outcomes (ECHO) consortium. Methods: We applied deep learning algorithms to GSV images to derive novel metrics of visible greenspace within 250m of participant’s residential addresses in 2007-2010 (mid-childhood, mean age 7.9y) and 2012-2016 (early adolescence, 13.2y). We calculated % total greenspace (combined % grass, % trees, % plants, % fields, and % flowers) within each image, and % grass and % trees separately. At in-person early adolescence research visits, trained research assistants assessed age- and sex-specific body mass index (BMI) z-scores, waist circumference, and dual-energy x-ray absorptiometry (DXA). We used linear regression to examine cross-sectional (adolescence) and longitudinal associations (mid-childhood to adolescent) between greenspace (per IQR) and adiposity, adjusting for child’s sex, race/ethnicity, and age; mother’s education, marital status, and pre-pregnancy BMI; father’s education and BMI; household income; neighborhood median income, and population density. Results: In cross-sectional analyses (N=652), higher % grass was associated with lower BMI z-score (-0.13 (-0.25,-0.01)); lower waist circumference (-1.38cm (-2.65,-0.10)); and lower DXA total fat (-0.30 kg/m² (-0.67, 0.08)) and trunk fat (-0.14 kg/m² (-0.32, 0.04)). No cross-sectional associations were observed for % total greenspace or % trees. In longitudinal analyses (N=400), there was a suggestion that higher % grass was associated with lower waist circumference (-0.86cm (-1.98, 0.27)), but no other associations were present. Conclusions: Street-view grass exposure was associated with lower measured adiposity among participants in early adolescence in cross-sectional analyses.

Family structure in relation to body mass index and metabolic score in European children and adolescents.

Living in single parent and blended families or as an only child-compared to living in two-parent biological families or with siblings, respectively-is associated with a higher body mass index (BMI) in cross-sectional studies. However, longitudinal research addressing the children's BMI in this context is scarce. Further, little is known about the association between family structure and metabolic health. This study aimed at investigating the association between both aspects of family structure with BMI and a metabolic score (MetS). Cross-sectional data from 7804 children participating in the European multi-center I.Family study (2013/2014) and longitudinal data from 5621 children who also participated previously in the IDEFICS study (2007-2010) were used. Family structure was assessed by a detailed interview. BMI z-score and the MetS were based on measured anthropometry, blood pressure, high-density lipoprotein, blood glucose, and triglycerides. Linear regressions were performed to model associations between family structure with BMI and MetS. Children from single-parent families had higher BMI z-scores in the cross-sectional (β=0.09, 95% confidence interval [CI]: 0.001 to 0.18) and longitudinal analyses compared to those from two-parent families. Cross-sectionally, the number of siblings was associated with lower BMI z-scores (β=-0.07, 95% CI: -0.10 to -0.03) and lower MetS (β=-0.14, 95% CI: -0.26 to -0.01). Longitudinally, only children between baseline and follow-up had higher BMI z-scores at follow-up (β=0.07, 95% CI: 0.01 to 0.14) compared to stable siblings. Obesity prevention measures should focus on single-parent households and families with an only child.