The Accuracy of Incident Vertebral Fracture Detection in Children Using Targeted Case-Finding Approaches

Area of Science:

• Pediatric Endocrinology
• Pediatric Rheumatology
• Pediatric Oncology
• Pediatric Nephrology

Background:

• Vertebral fractures are significant complications in children with various chronic diseases.
• Glucocorticoid therapy increases the risk of vertebral fractures in pediatric patients.
• Accurate detection of incident vertebral fractures (IVF) is crucial for timely intervention.

Purpose of the Study:

• To assess the effectiveness of different case-finding strategies for detecting incident vertebral fractures (IVF) in glucocorticoid-treated children.
• To compare strategies in both prevalent vertebral fracture (PVF) known and unknown scenarios.
• To provide guidance for optimizing spine radiography in at-risk pediatric populations.

Main Methods:

• A 2-year prospective study of 343 children treated with glucocorticoids for leukemia, rheumatic disorders, or nephrotic syndrome.
• Measurement of lumbar spine bone mineral density (LS BMD) using dual-energy X-ray absorptiometry.
• Quantification of vertebral fractures on spine radiographs (modified Genant method) and assessment of back pain via patient report.

Main Results:

• 12.8% of patients experienced incident vertebral fractures (IVF).
• In the PVF scenario, low LS BMD and PVF were significant predictors of IVF.
• In the non-PVF scenario, low LS BMD plus back pain demonstrated high specificity (87%) and accuracy (82%), with a low radiography rate (17%).

Conclusions:

• Case-finding strategies incorporating low LS BMD and patient-reported symptoms can effectively target spine radiography in children at risk for vertebral fractures.
• The combination of low LS BMD and back pain is a highly specific and accurate approach for detecting IVF in children with unknown baseline fracture status.
• These findings support the development of evidence-based guidelines for vertebral fracture screening in pediatric populations undergoing long-term glucocorticoid therapy.