Femoral neck-shaft angle and bone age in 4- to 24-year-olds based on 1005 EOS three-dimensional reconstructions.

Journal of Pediatric Orthopedics. Part B
Ian O'SullivanCsaba Vermes

Abstract

The aim of the study was to assess the correlation between femoral neck-shaft angles (NSAs) and skeletal maturity in EOS reconstructions from a large population of children. Full-body three-dimensional (3D) reconstructions were generated from 1005 children and young adults (4-24 years old; 449 male, 556 female) using the EOS three-dimensional/3D scanner, with images taken during routine clinical practice. The true NSAs were measured and assessed for correlation with individuals' chronological age and bone age, based on cervical vertebral morphology. Statistical analysis was performed using Spearman correlation, independent t-test and multiple linear regression. NSAs of older and younger individuals within each bone age group and chronological age were further assessed by t-test. NSA values fell from mean 131.89° ± 6.07° at 4 years old to 128.85° ± 4.46° at the age of 16, with only minor decreases thereafter. Significantly higher NSAs (3.16° and 4.45°, respectively) were found in those with a bone age advanced or delayed by more two or more stages compared to their peers of the same chronological age (P < 0.001; P < 0.001). Similarly, within most bone age stages, individuals of advanced or delayed chronological age exhibited ele...Continue Reading

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