Orthopaedics · Sport and Exercise Medicine

RAPID Score for Acetabular Chondrolabral Disruption calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Sex

Tönnis grade

Grade 3 was not in the cohort and is not scored.

Alpha angle on the Dunn view

degrees

Allowed range: 20–120 degrees

Above 55 degrees is cam morphology and scores 1. An angle of 55 degrees scores 0.

Result

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Primary source

Hevesi M et al. The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) score: an in-clinic predictive model for high-grade acetabular chondrolabral disruption. Orthop J Sports Med. DOI: 10.1177/2325967118799068. PMID: 30302348. Table 3: female 0, male 1; Tönnis grade 0 scores 0, grade 1 scores 2, grade 2 scores 3; cam morphology absent 0, present 1. Cam morphology is an alpha angle above 55 degrees on the Dunn view. The total is 0–5. The Figure 2 caption calls scores 0–1 low risk, 2–3 intermediate risk, and 4–5 high risk. Printed damage risks are 10.5% at 0 points, 37% at 2 points, and 88.0% at 5 points. A score of 5 had specificity 99.1%. No hip in the cohort was Tönnis grade 3. (2018)

Scope: People undergoing primary hip arthroscopy after nonoperative care, with a preoperative radiograph. Tönnis grade 3 was not present in the derivation cohort and is not scored.

Last reviewed 2026-10-17

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Professional use only

For qualified clinicians. Independently verify inputs, calculations, source guidance, and applicability before any clinical action. This calculator does not replace clinical judgment.

Source: Hevesi M et al. The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) score: an in-clinic predictive model for high-grade acetabular chondrolabral disruption. Orthop J Sports Med. DOI: 10.1177/2325967118799068. PMID: 30302348. Table 3: female 0, male 1; Tönnis grade 0 scores 0, grade 1 scores 2, grade 2 scores 3; cam morphology absent 0, present 1. Cam morphology is an alpha angle above 55 degrees on the Dunn view. The total is 0–5. The Figure 2 caption calls scores 0–1 low risk, 2–3 intermediate risk, and 4–5 high risk. Printed damage risks are 10.5% at 0 points, 37% at 2 points, and 88.0% at 5 points. A score of 5 had specificity 99.1%. No hip in the cohort was Tönnis grade 3. (2018)

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Clinical inputs

Sex
Tönnis grade
Alpha angle on the Dunn view (degrees)Accepted range: 20 to 120

Primary source

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