A pilot study: does obesity begin in the first year of life?

Interventions Aimed at Decreasing Obesity in Hispanic Children in the First 1000 Days: A Systematic Review

The prevalence of obesity is higher among Hispanic children than among all other ethnicities, and recent efforts have been focused on addressing this growing disparity. The objective of this review was to examine the evidence for interventions designed to reduce obesity in Hispanic children in the first 1000 days of life and to assess and summarize the effectiveness of the interventions. A literature search was conducted using MEDLINE, Scopus, and PubMed. Included in the review were published studies that evaluated an intervention designed to prevent or reduce obesity in Hispanic children in the first 1000 days of life. Quality was assessed using the GRADE system. Out of 134 citations that were retrieved, 11 articles underwent full-text review, and 5 articles met study inclusion criteria. Only one study was of high quality, and the rest were of low or moderate quality. Three of the studies were lifestyle interventions, and two were educational interventions. Four out of the five interventions led to significant improvements in the outcome measures assessed. Very few published studies tested interventions in the population of Hispanic children ages 0-2 years. Limited evidence does suggest that these interventions may improve behaviors related to factors known to increase the risk for obesity. Future research should focus on designing interventions using common themes observed among successful studies. Further, these studies should also include clinical measures of obesity to further establish their effectiveness.

Early Feeding Practices and Weight Status at One Year of Age: A Comparison of Hispanic Immigrant Mother-Infant Dyads with Participants of the Infant Feeding Practices Study II

BACKGROUND

Hispanic preschoolers have higher rates of BMI ≥85th percentile than any other racial/ethnic group. To identify underpinnings of this disparity, we compared early feeding practices and subsequent weight status for a sample of infants of low-income, Hispanic immigrant mothers with participants from the Infant Feeding Practices Study II (IFPS II).

METHODS

Proyecto de Bebés Hispanos Saludables (PBHS) collected medical record data for mother-infant dyads (n = 550) from a large pediatric clinic for low-income families and merged it with IFPS II data (n = 1502) to compare early feeding practices and late infancy weight status.

RESULTS

Mode of milk delivery for PBHS mothers was less likely to be exclusive breastfeeding at 6 months (9.0% vs. 27.5%), but more likely to be both breast and bottle feeding (43.5% vs. 26.3%) compared to IFPS II mothers. No difference was found in age for solid food introduction. Weight for age of PBHS infants was more likely to be ≥85th percentile at 12 months than IFPS II infants (39.1% vs. 25.4%). Both PBHS and IFPS II infants were more likely to be ≥85th percentile at 1 year if mode of milk delivery was bottle only at 6 months compared to those who were breastfed only, even after adjusting for potential confounders.

CONCLUSION

Differences in PBHS and IFPS II feeding practices and weight status suggest additional studies of modifiable, early life risk factors are needed to inform clinical and public health interventions that reduce childhood obesity for this growing sector of the US population.

Early Childhood Disadvantage for Sons of Mexican Immigrants: Body Mass Index Across Ages 2-5

PURPOSE

To distinguish the origins of higher weight status and determine when and why intra- and interracial/ethnic disparities emerge.

DESIGN

The study used a longitudinal analysis of the Early Childhood Longitudinal Study-Birth Cohort (ECLS-B).

SETTING

The study was conducted in the United States.

SUBJECTS

Participants were children of non-Hispanic white mothers and children of U.S.- and foreign-born mothers of Mexican origin from a nationally representative sample of children born in the year 2001 (N ≈ 3700).

MEASURES

The Centers for Disease Control and Prevention growth charts determined sex- and age-specific weight status. Covariates were obtained from birth certificate records and parent interviews.

ANALYSIS

Frequencies, growth curve trajectories, and ordinary least squares regression examined body mass index (BMI) and obesity across survey waves.

RESULTS

Compared to their peers with non-Hispanic white mothers, children of Mexican-heritage mothers have higher average BMI and greater rates of obesity. The BMI of boys with Mexican-born mothers is higher relative to whites and children of U.S.-born Mexican mothers across early childhood, increasing sharply at about age 4.5 years. This divergence is driven by increases in the BMI of boys, as girls do not show the same growth. A number of measures, including descriptors of children's nutritional intake, lifestyle factors, and acculturation, do not explain the increased obesity rates among sons of Mexican mothers.

CONCLUSION

Despite favorable perinatal health and weight, Mexican-American sons of foreign-born mothers show disadvantages in BMI that emerge close to the start of kindergarten.

Risk Factors for Childhood Obesity in the First 1,000 Days: A Systematic Review

CONTEXT

Mounting evidence suggests that the origins of childhood obesity and related disparities can be found as early as the "first 1,000 days"-the period from conception to age 2 years. The main goal of this study is to systematically review existing evidence for modifiable childhood obesity risk factors present from conception to age 2 years.

EVIDENCE ACQUISITION

PubMed, Embase, and Web of Science were searched for studies published between January 1, 1980, and December 12, 2014, of childhood obesity risk factors present during the first 1,000 days. Prospective, original human subject, English-language research with exposure occurrence during the first 1,000 days and with the outcome of childhood overweight or obesity (BMI ≥85th percentile for age and sex) collected between age 6 months and 18 years were analyzed between December 13, 2014, and March 15, 2015.

EVIDENCE SYNTHESIS

Of 5,952 identified citations, 282 studies met inclusion criteria. Several risk factors during the first 1,000 days were consistently associated with later childhood obesity. These included higher maternal pre-pregnancy BMI, prenatal tobacco exposure, maternal excess gestational weight gain, high infant birth weight, and accelerated infant weight gain. Fewer studies also supported gestational diabetes, child care attendance, low strength of maternal-infant relationship, low SES, curtailed infant sleep, inappropriate bottle use, introduction of solid food intake before age 4 months, and infant antibiotic exposure as risk factors for childhood obesity.

CONCLUSIONS

Modifiable risk factors in the first 1,000 days can inform future research and policy priorities and intervention efforts to prevent childhood obesity.

Utilising infant growth to predict obesity status at 5 years

AIM

This study determines if an early life growth pattern in healthy infants can predict obesity at age 5.

METHODS

Randomly selected from all healthy children born from 1997 to 2001 in a Midwestern US Health Maintenance Organization; growth patterns from birth to 5 years were described for children who were categorised by obesity classification at 5 years into normal weight (n = 61), overweight (n = 47), obese (n = 41) and morbidly obese (n = 72) cohorts using World Health Organization body mass index (BMI) criteria. A retrospective longitudinal analysis based on weighted least squares was performed on BMI by age (1 week; 2, 4, 6, 9, 12, 15 and 18 months; and 2, 3, 4 and 5 years). Graphs of the longitudinal repeated measures analysis of variance of means allowed identification of the earliest significant divergence of a cohort's average BMI pattern from other cohorts' patterns.

RESULTS

Distinctions in growth patterns and BMIs were evident before 1-year post-birth. Children who were obese or morbidly obese at 5 years demonstrated a BMI pattern that differed from children who were normal weight at 5 years.

CONCLUSIONS

Identifying obesity development in early life may assist with prevention of later obesity. The results merit future study. An early life BMI growth pattern is clinically important because it permits discrimination of those who do and do not fit a normal weight pattern, guiding individualised interventions in the first year of life while precursors of later health are still forming.