:

What is the standard deviation of bone age? Understanding Normal Variation

The typical standard deviation for bone age is approximately one year at any given chronological age, a figure widely accepted in clinical practice. This means a significant amount of natural, healthy variation exists in skeletal maturity among children of the same age. Understanding **what is the standard deviation of bone age** is crucial for interpreting these assessments, differentiating normal growth patterns from potential medical conditions that affect a child's development.