Factors affecting height velocity in normal prepubertal children.

Area of Science:

• Pediatric Endocrinology
• Growth and Development
• Biometrics

Background:

• Assessing growth velocity in children is crucial for identifying potential health issues.
• Insulin-like growth factors (IGF) play a role in childhood growth, but their predictive value for height velocity in healthy prepubertal children requires further investigation.

Purpose of the Study:

• To analyze the impact of clinical and laboratory factors, including insulin-like growth factor (IGF) levels, on the height velocity of normal prepubertal children.
• To determine predictors of above-average height velocity in healthy prepubertal children.

Main Methods:

• Ninety-five healthy prepubertal children (mean age 6.3 years) were monitored for one year.
• Measurements included chronological age, height standard deviation score (SDS), body mass index (BMI) SDS, and insulin-like growth factor (IGF-1) and IGF binding protein-3 (IGFBP-3) levels.
• Statistical analyses, including multiple linear and binomial logistic regression, were used to associate baseline factors and changes over one year with height velocity.

Main Results:

• Children with height velocity ≥6 cm/year were younger and had a smaller increase in BMI SDS compared to those with lower height velocity.
• Older chronological age at referral and an increase in BMI SDS over one year were associated with decreased odds of achieving above-average height velocity.
• Baseline IGF-1 SDS and IGFBP-3 SDS did not differ between groups and were not associated with subsequent height velocity.

Conclusions:

• Height velocity in normal prepubertal children is influenced by chronological age and changes in BMI SDS.
• Prepubertal IGF-1 SDS reflects current height status but does not predict future height velocity.
• Clinical factors like age and BMI changes are more indicative of growth potential than IGF levels in this population.