Paediatric anaesthesia & critical care

External Validation of the Risk Assessment of Morbidity in Pediatric Surgery Score

Anesth AnalgPublished External validation of the Risk Assessment of Morbidity in Pediatric Surgery (RAMPS) score

Authors' conclusion

The RAMPS score performed well in this external validation with overall less patient complexity and less morbidity than in the original cohort included for development and internal validation. The score moderately overestimated risk in the most complex patients, which does not diminish its utility in guiding resource allocation to manage or prevent perioperative adverse events. In summary, the RAMPs score is a simple, highly discriminant, well-calibrated, and externally validated tool clinicians and health systems can use to predict morbidity among pediatric surgery patients.

Study context

Population
Patients undergoing noncardiac, nontrauma, and nontransplant pediatric surgeries at an external tertiary care children's hospital in 2019patients included
Participants
13,718 patients
Comparison
RAMPS score predicted risk vs observed composite morbidity
Outcome
Composite morbidity:
  • Transfer to intensive care unit (ICU)
  • Cardiac arrest
  • Unplanned endotracheal intubation
  • Unplanned initiation of PPV in the 72 hours following surgery
Follow-up
72 hours following surgery

Performance

As reported in the abstract

Patients with the composite morbidity outcome

409

2.98%

Postoperative PPV (most common morbidity)

361

2.63%

Further findings

Association of each RAMPS score component with the outcome

Each component of the RAMPS score was significantly associated with the outcome

Discrimination of the RAMPS score

AUC
0.829 (95% CI, 0.809-0.849)
  • Very good discrimination

Calibration of the RAMPS score

Brier score
0.03
  • Good calibration between observed and predicted probabilities

Cohort characteristics

Critically ill
1.5% (n = 205)
At least three chronic conditions
14.1% (n = 1934)
Procedure in intrinsic surgical risk (ISR) quartiles 3 or 4
19.5% (n = 2668)

Original publication

External Validation of the Risk Assessment of Morbidity in Pediatric Surgery Score. Anesth Analg. Published 12 October 2026. doi:10.1213/ane.0000000000008353

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