This Week in Pediatrics
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CDC Reduces US Childhood Immunization Schedule From 17 to 11 Diseases | AJMC
“All vaccines currently recommended by CDC will remain covered by insurance without cost sharing,” Mehmet Oz, MD, administrator of the Centers for Medicare & Medicaid Services, said in a statement.
New Study Questions Four-Decade-Old Theory on Childhood Body Composition
To facilitate accurate clinical assessment, Professor Agbaje’s team has developed and published an accessible waist-to-height ratio calculator, enabling health professionals and caregivers to more precisely detect excess adiposity in children and adolescents. This tool holds prom...
Research of the Day
Duration of Breastfeeding and Childhood Obesity Risk: Meta-Analysis of 150 Cohort Studies
This comprehensive meta-analysis synthesized data from 150 cohort studies involving over 2.5 million children to examine the relationship between breastfeeding duration and obesity risk. Children breastfed for 6+ months showed a 22% reduction in obesity risk at ages 5-10 compared to never-breastfed children.
Key findings: (1) Each additional month of breastfeeding associated with 3% lower obesity odds; (2) Effects persisted after adjusting for socioeconomic status and maternal BMI; (3) Exclusive breastfeeding showed stronger effects than mixed feeding.
These findings strengthen breastfeeding support recommendations. Counsel expectant parents on breastfeeding benefits, ensure access to lactation support, and address barriers to continued breastfeeding.
Popular Beliefs
Cold weather causes colds
What the evidence shows: Colds are caused by viruses, not cold temperatures. The association exists because people spend more time indoors in close proximity during winter, facilitating viral transmission. Additionally, dry indoor air may impair mucosal barriers. Hand hygiene and avoiding sick contacts are the real prevention strategies.
Sugar makes children hyperactive
What the evidence shows: Multiple double-blind, placebo-controlled studies have found no significant effect of sugar on behavior or cognitive performance in children, even in those reportedly 'sensitive' to sugar. The perceived hyperactivity is often due to the context (parties, holidays) or parental expectations. However, limiting added sugars remains important for dental health and nutrition.
Reading to babies is pointless—they don't understand
What the evidence shows: Research consistently demonstrates that reading to infants from birth supports language development, vocabulary acquisition, and later literacy skills. Even before understanding words, babies benefit from hearing language patterns, rhythm, and the bonding experience. The AAP recommends reading aloud beginning in infancy.
Behaviors
Screen Time and Executive Function in Preschoolers: A Longitudinal Analysis
This prospective cohort study followed 850 children from ages 2 to 5 years, examining the relationship between screen time exposure and executive function development. Researchers used validated parent-report measures and direct assessments of working memory, inhibitory control, and cognitive flexibility.
Children with more than 2 hours of daily screen time at age 2 showed lower scores on executive function measures at age 5. Notably, the type of screen content mattered—educational programming showed smaller associations than passive entertainment viewing. Joint parent-child viewing partially mitigated negative effects.
These findings support counseling families on the AAP recommendation of less than 1 hour per day of high-quality programming for children 2-5 years. Emphasize co-viewing and educational content when screens are used. Executive function is crucial for school readiness and later academic success.
Genetics
Genetic Predictors of Peanut Allergy Persistence
Genome-wide association study identifies genetic variants associated with peanut allergy persistence versus resolution. Children with certain variants are more likely to outgrow their allergy, informing timing of oral food challenges.
Key findings: (1) 4 genetic variants strongly associated with persistence; (2) Genetic testing could reduce unnecessary avoidance and challenges; (3) Environmental factors remain important in allergy development.
Genetic testing may soon help predict which children will outgrow allergies. For now, continue regular reassessment with IgE testing and oral challenges as clinically indicated.