Predictors of adolescents' weight misclassification: A longitudinal study.

Area of Science:

• Pediatric Health
• Adolescent Medicine
• Public Health Nutrition

Background:

• Accurate body weight perception is crucial for adolescent health.
• Misclassification of weight can impact health behaviors and outcomes.
• Understanding predictors of misclassification is vital for targeted interventions.

Purpose of the Study:

• To investigate the prevalence of adolescents' and mothers' misclassification of adolescent body weight.
• To identify early life predictors associated with weight misclassification.

Main Methods:

• Longitudinal Australian birth cohort study data analyzed (n=3925 adolescents, n=3721 mothers).
• Adolescent body weight categorized objectively (measured height/weight) and subjectively (self-report).
• Maternal perception of adolescent offspring's weight also recorded; predictors examined from pregnancy, childhood, and adolescence.

Main Results:

• Approximately 30% of adolescents and 25% of mothers misclassified adolescent body weight.
• Underestimation was more common in overweight adolescents; overestimation in underweight adolescents.
• Predictors included being female, dieting, maternal BMI status, and poor mental health.

Conclusions:

• Adolescent weight misclassification is prevalent across all BMI categories.
• Female sex, dieting behaviors, poor mental health, and maternal BMI are significant predictors.
• Further research is needed to determine the public health implications of these weight misclassifications.