Coronary disease & ACSDiagnostic or prognostic study
Retrograde Coronary Chronic Total Occlusion Intervention (JR-CTO) Score
- Prediction model development and validation study (registry-based)
- derivation and validation cohorts (2:1 random split)
- multicentre registry
Authors' conclusion
The JR-CTO (Japanese Retrograde Chronic Total Occlusion) score, a simple 4-item score that predicts successful guidewire crossing in patients undergoing retrograde CTO-PCI, has the potential to support clinical decision-making for the retrograde approach.
Study context
- Population
- Patients undergoing primary retrograde CTO-PCI, Japanese CTO-PCI Expert Registry, January 2016–December 2022
- Participants
- 2,374 patients
- Comparison
- Derivation vs Validation
- Outcome
- Guidewire failure in retrograde CTO-PCI (JR-CTO score: 1 point per factor, summed)
Performance
As reported in the abstract
Discrimination of the JR-CTO score for guidewire failure
| Test or model | C-statistic |
|---|---|
| Derivation | 0.72 (95% CI: 0.67-0.76) |
| Validation | 0.71 (95% CI: 0.64-0.77) |
Further findings
Guidewire and technical success, guidewire crossing time, procedural time by score
- Lower scores: higher guidewire and technical success rates, shorter guidewire crossing and procedural times
- P < 0.01
Original publication
Retrograde Coronary Chronic Total Occlusion Intervention (JR-CTO) Score. JACC Cardiovasc Interv. Published 1 May 2024. doi:10.1016/j.jcin.2024.03.023
Summarised from the published abstract; every number is checked against it