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Purpose <p>To investigate the changes in pelvic measurements and lumbar lordosis with age in children and adolescents and to find a relationship between pelvic parameters and lumbar lordosis to estimate appropriate lordosis in the adolescent idiopathic scoliosis surgery.</p> Methods <p>A retrospective analysis of 382 abdominal-pelvic CT scans was conducted, with pelvic incidence, sacral slope, pelvic tilt, supine lumbar lordosis, and a derived parameter L1 slope measurements performed. Participants were divided into three age groups: 3–10, 11–15, and 16–18 years. Statistical correlations are performed among parameters and between age groups.</p> Results <p>Showed that pelvic incidence, sacral slope, pelvic tilt and supine lumbar lordosis increased significantly with age, with pelvic incidence rising by 7.2° from childhood to late adolescence. Notably, L1 slope remained constant across age groups, suggesting its potential as a stable parameter during growth. Strong correlations were observed between sacral slope and supine lumbar lordosis (<i>R</i> = 0.904). Mathematical formulas for estimating supine lumbar lordosis from pelvic incidence (SLL = 0.714xPI + 12.297) and sacral slope (SLL = 1.19xSS + 2.22) were derived.</p> Conclusion <p>L1 slope as a stable parameter during the growth period is a potentially overlooked but critical parameter in pediatric spinal assessments. Derived mathematical formulas may offer clinical utility for surgical planning in adolescent idiopathic scoliosis.</p>

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Changes in pelvic measurements and lumbar lordosis with age in children and adolescents

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Atakan Küskün,
  • Ahmet Celal İplikçioğlu,
  • Muzaffer Savaş Tepe

摘要

Purpose

To investigate the changes in pelvic measurements and lumbar lordosis with age in children and adolescents and to find a relationship between pelvic parameters and lumbar lordosis to estimate appropriate lordosis in the adolescent idiopathic scoliosis surgery.

Methods

A retrospective analysis of 382 abdominal-pelvic CT scans was conducted, with pelvic incidence, sacral slope, pelvic tilt, supine lumbar lordosis, and a derived parameter L1 slope measurements performed. Participants were divided into three age groups: 3–10, 11–15, and 16–18 years. Statistical correlations are performed among parameters and between age groups.

Results

Showed that pelvic incidence, sacral slope, pelvic tilt and supine lumbar lordosis increased significantly with age, with pelvic incidence rising by 7.2° from childhood to late adolescence. Notably, L1 slope remained constant across age groups, suggesting its potential as a stable parameter during growth. Strong correlations were observed between sacral slope and supine lumbar lordosis (R = 0.904). Mathematical formulas for estimating supine lumbar lordosis from pelvic incidence (SLL = 0.714xPI + 12.297) and sacral slope (SLL = 1.19xSS + 2.22) were derived.

Conclusion

L1 slope as a stable parameter during the growth period is a potentially overlooked but critical parameter in pediatric spinal assessments. Derived mathematical formulas may offer clinical utility for surgical planning in adolescent idiopathic scoliosis.