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The associations between 2D:4D ratio and behavior problems among Chinese preschool children: A cross-sectional study

Lan Tao1, Ruoyao Wu2, Xingxing Song1

  • 1Department of Child and Adolescents Health, School of Public Health, Bengbu Medical College, 2600 East Sea Avenue, Bengbu 233030, Anhui, China.

Early Human Development
|October 5, 2023
PubMed

Insights

The digit ratio (2D:4D) may correlate with behavior issues in Chinese preschoolers. Prenatal testosterone exposure appears to influence these behaviors, offering insights for early intervention strategies.

Area of Science:

  • Developmental Psychology
  • Pediatrics
  • Endocrinology

Background:

  • The 2D:4D digit ratio is a recognized marker for prenatal androgen exposure.
  • Prenatal hormone levels can significantly impact a child's psychological development and behavior.

Purpose of the Study:

  • To investigate the relationship between the 2D:4D ratio and behavioral problems in Chinese preschool children.
  • To inform early intervention approaches for addressing behavioral issues in young children.

Main Methods:

  • Recruited 548 Chinese preschool children (ages 3-6) using stratified cluster sampling.
  • Assessed behavior problems using the Child Behavior Checklist (CBCL).
  • Measured finger lengths using an electronic vernier caliper and collected demographic data.

Main Results:

  • Child's sex, age, mother's education, and sibling status influenced behavior problems.
  • A lower right-hand 2D:4D ratio correlated with increased anxiety/depression and attention problems.
  • Higher prenatal testosterone exposure, indicated by a lower 2D:4D ratio, may elevate risks for specific behavioral issues, contrasting some prior research.

Conclusions:

  • The 2D:4D ratio shows potential association with behavioral problems in Chinese preschoolers.
  • Prenatal testosterone exposure is a key factor potentially influencing children's behavior, warranting further investigation.
Abstract

Keywords:
2D:4DBehavior problemsDepressionDigit ratioPreschool childrenTestosterone

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