Child temperament predicts the adiposity rebound. A 9-year prospective sibling control study

Area of Science:

• Child Psychology
• Pediatric Endocrinology
• Developmental Behavioral Science

Background:

• Adiposity rebound timing is a critical indicator of future obesity risk.
• Child temperament, encompassing behavioral and emotional traits, may influence early development trajectories.
• Understanding early markers for adiposity rebound is crucial for timely intervention.

Purpose of the Study:

• To investigate the association between child temperament and the timing of adiposity rebound.
• To explore how sociability, shyness, and negative emotionality relate to adiposity rebound timing.
• To examine developmental changes in temperament's influence on adiposity rebound.

Main Methods:

• Longitudinal study of 25,889 siblings from pregnancy to age 8 in the Norwegian Mother and Child Cohort Study.
• Data collection via health registries, maternal reports (height, weight), and temperament questionnaires (ages 1.5, 3, 5).
• Growth curve and multilevel analyses to assess associations between temperament and adiposity rebound timing.

Main Results:

• High sociability scores predicted an earlier adiposity rebound (6-16 weeks earlier).
• High shyness scores predicted a later adiposity rebound (6-16 weeks later).
• Negative emotionality did not significantly predict adiposity rebound timing; associations strengthened with child age.

Conclusions:

• Child temperament traits serve as early predictive markers for adiposity rebound timing.
• Sociability and shyness are significant temperament predictors of adiposity rebound.
• Future research should incorporate broader personality measures, like the Five Personality Factors, to further elucidate these links.