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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

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Clinical Report: Simplified Bone Age Method May Aid Review

Overview

A simplified method for assessing adolescent bone age demonstrated strong agreement with the Greulich-Pyle method, with 91% of assessments falling within 1 year of GP estimates.

Background

Bone age assessment is crucial in pediatric endocrinology for evaluating growth disorders. Traditional methods can be complex and time-consuming, necessitating the development of simplified approaches.

Data Highlights

GroupMean Difference (Years)Within ±1 Year (%)
Boys+0.0292%
Girls−0.1491%
Inexperienced Raters (Boys)N/A85%
Inexperienced Raters (Girls)N/A77%

Key Findings

  • The simplified method showed a mean difference of +0.02 years in boys and 0.14 years in girls compared to the GP method.
  • Approximately 91% of assessments by experienced raters were within 1 year of GP estimates.
  • Repeatability of the simplified method was slightly lower than that of the GP method but remained clinically acceptable.
  • Inexperienced raters had lower agreement, with 85% of male and 77% of female assessments within 1 year of GP estimates.

Clinical Implications

The simplified bone age assessment method should not replace detailed GP assessments.

Conclusion

The simplified method aligns closely with established standards.

Related Resources & Content

  1. Limony Y., et al., Clinical Endocrinology, 2023 -- Simplified Bone Age Method May Aid Review
  2. The Journal of Clinical Endocrinology & Metabolism — Development of an Enhanced Model for Bone Age Evaluation in Chinese Children Aged 3 to 18 Years
  3. conexiant — Combined Clavicle Model May Improve Age Estimates
  4. European Radiology — A Systematic Review of Knee Magnetic Resonance Imaging for Estimating Chronological Age
  5. European Radiology — Ultrasound-Based Tanner-Whitehouse Skeletal Maturity Assessment for Bone Age Evaluation
  6. Development of an Enhanced Model for Bone Age Evaluation in Chinese Children Aged 3 to 18 Years
  7. Combined Clavicle Model May Improve Age Estimates
  8. A Systematic Review of Knee Magnetic Resonance Imaging for Estimating Chronological Age
  9. Ultrasound-Based Tanner-Whitehouse Skeletal Maturity Assessment for Bone Age Evaluation
  10. Bone age assessment: comparative analysis of Greulich-Pyle and Tanner-Whitehouse 3 by pediatric radiologists and endocrinologists
  11. Central Precocious Puberty | Endocrine Society
  12. Artificial Intelligence-Based Models for Automated Bone Age Assessment from Posteroanterior Wrist X-Rays: A Systematic Review | MDPI

Original Source(s)

Simplified Bone Age Method May Aid Review

  • by Andrea Surnit

  • July 2, 2026

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