Reevaluating Patellar Height Indices in Pediatric Patellofemoral Instability: Comparative Accuracy of Caton Deschamps Index, Patellotrochlear Index, and Sagittal Patellar Engagement.

Q: What does this research mean for the field?

The Caton Deschamps Index (CDI) is more accurate than the Patellotrochlear Index (PTI) and Sagittal Patellar Engagement (SPE) in discriminating patella alta in pediatric patients with patellofemoral instability. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

Giulia Beltrame; Marco Crippa; Samuel A. Beber; Sarah Lu; Ariana I. Matarangas; Diego Jaramillo; Daniel W Green

doi:10.1177/03635465261426564

March 8, 2026

Reevaluating Patellar Height Indices in Pediatric Patellofemoral Instability: Comparative Accuracy of Caton Deschamps Index, Patellotrochlear Index, and Sagittal Patellar Engagement.

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Key Points

The aim is to evaluate the accuracy of different patellar height indices in identifying patella alta in children with patellofemoral instability.
Comparative analysis of Caton Deschamps Index (CDI), Patellotrochlear Index (PTI), and Sagittal Patellar Engagement (SPE).
MRI assessments to classify patellar height and engagement.
Assessment of discriminative ability of each index for patella alta.
CDI showed superior discriminative ability for detecting patella alta compared to PTI and SPE.
MRI often indicated preserved patellofemoral engagement, even with CDI-defined patella alta.
The indices demonstrated complementary roles in evaluation.

Implication

Research reveals that Caton Deschamps Index is more accurate for patella alta in children, suggesting improved diagnostic approaches.

Abstract

PTI and SPE demonstrated poorer discriminative ability for patella alta than CDI. However, MRI-based indices frequently indicated preserved patellofemoral engagement despite CDI-defined patella alta, underscoring their complementary role.

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Cite This Study

Beltrame et al. (2026) studied this question.

synapsesocial.com/papers/69b2589696eeacc4fcec85b8 https://doi.org/10.1177/03635465261426564

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Reevaluating Patellar Height Indices in Pediatric Patellofemoral Instability: Comparative Accuracy of Caton Deschamps Index, Patellotrochlear Index, and Sagittal Patellar Engagement.

Key Points

Implication

Abstract

Discussion

Cite This Study

Reevaluating Patellar Height Indices in Pediatric Patellofemoral Instability: Comparative Accuracy of Caton Deschamps Index, Patellotrochlear Index, and Sagittal Patellar Engagement.

Key Points

Implication

Abstract

Discussion

Cite This Study

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