Simplified Bone Age Method May Aid Review

Single-bone approach showed close agreement with Greulich-Pyle assessments in adolescents, particularly among experienced raters

By
Andrea Surnit
July 2, 2026
3 min

MDSpire News

Objective:

To evaluate a simplified method for assessing adolescent bone age using a single key bone per age group and compare it with the standard Greulich-Pyle method.

Approach:

Study Design: A retrospective study involving 117 hand and wrist radiographs from adolescents referred for short stature evaluation.
Methods: Two experienced pediatric endocrinologists performed duplicate readings using both methods, while two inexperienced pediatric residents assessed radiographs using only the simplified method.

Key Findings:

Approximately 91% of simplified assessments by experienced raters fell within 1 year of Greulich-Pyle estimates.
Mean difference between simplified and GP methods was +0.02 years in boys and -0.14 years in girls.
Repeatability of the simplified method was slightly lower than GP but within clinically acceptable limits.
Agreement was lower among inexperienced raters, with 77% of female and 85% of male assessments within ±1 year of GP estimates.

Interpretation:

The simplified method may serve as a rapid secondary review tool.

Limitations:

Patient population consisted exclusively of adolescents referred for short stature evaluation, limiting generalizability.
Inexperienced raters did not perform parallel GP assessments.