Oncologic Diagnoses Linked to 72-Hour Pediatric ED Returns

Key Takeaways

• Among children using one Chinese tertiary hospital’s high-priority pediatric emergency pathway, underlying diagnosis was associated with 72-hour same-pathway return, while abnormal vital-sign count was not independently associated.
• Established oncologic conditions had the strongest adjusted diagnostic association with return, with exploratory evidence that the association was stronger in yellow-zone encounters.
• Yellow-zone encounters had greater adjusted return odds than red-zone encounters, although the association weakened when neonates or frequent visitors were excluded.
• Hematologic diagnoses were associated with return in the primary model, but that association weakened under some sensitivity restrictions.

Which children re-present soon after leaving high-priority pediatric emergency care? In children with established cancer, initial physiology may not reflect the burden of underlying disease. The hospital’s locally assigned red and yellow zones raise another question: do return patterns differ between them? New registrations to the same pathway offered a way to examine these questions.

At a tertiary women’s and children’s hospital in China, investigarors conducted a retrospective cohort. Local triage levels I and II entered the red zone, and level III entered the yellow zone; this pathway was broader than immediate resuscitation.

The cohort comprised 24,479 children contributing 30,170 eligible visits from January 1 through December 31, 2025, which were the analytical units. A return was the child’s next new, nurse-triaged registration to the same pathway within 72 hours of index registration, not discharge. Every visit could be an index, including a return visit; continuous emergency observation created no new visit.

In-hospital deaths and records lacking essential fields were excluded; a small number of level-IV yellow-zone encounters remained. Mixed-effects logistic regression used a patient-level random intercept and adjusted for zone, sex, age, first-recorded focused diagnosis, abnormal vital-sign count, night shift, and season. Triage level was substituted for its structurally linked zone in a sensitivity model; a separate model tested zone-by-diagnosis interaction.

Overall, 1,507 of 30,170 index visits were followed by an unscheduled return to the same pathway within 72 hours (5%). This outcome did not capture all emergency revisits.

Crude returns were more frequent in the yellow zone. The adjusted odds ratio (aOR) for yellow versus red was 2.28 (95% confidence interval [CI] 1.34–3.87); zone assignment was not tested as a cause of return.

Oncologic conditions had the strongest adjusted diagnostic association with return: aOR 6.48 (95% CI 3.54–11.87). This association persisted across sensitivity restrictions.

Hematologic disease was also associated with return: aOR 2.49 (95% CI 1.06–5.89). Its association weakened after high-frequency patients or chained returns were excluded. Circulatory disease’s crude association did not persist after adjustment; neonatal or perinatal diagnoses, abnormal vital-sign count, and night-shift presentation were not independently associated.

A distinct yellow-zone-by-oncology interaction yielded an aOR of 5.10 (95% CI 1.25–20.84; p = 0.023), suggesting a stronger oncology association in yellow-zone encounters. The red-zone comparison showed no clear association, which does not establish absence of risk. The wide interval makes the interaction an imprecise, exploratory signal.

These retrospective associations come from one Chinese hospital’s locally defined pathway; neonatal routing and zone allocation may differ elsewhere. Returns to lower-acuity emergency or outpatient services were not counted. First-recorded diagnosis is not a validated complexity measure, hematologic diagnoses encompass different conditions, and missing vital-sign measurements added no abnormality to the count. Incomplete information on disposition, follow-up, caregiver decisions, and preventability, along with potentially unmeasured severity, treatment stage, or comorbidities, limits explanations for returns. The zone association weakened after excluding neonates or frequent visitors, and sparse subgroup events limit zone-specific certainty.

Investigators concluded that diagnostic category, especially established cancer, was more consistently associated with early same-pathway return than initial abnormal vital-sign count. They regarded zone heterogeneity as requiring confirmation elsewhere.

Clinician Questions

Were pediatric oncology diagnoses first established during high-priority emergency visits in this cohort?

For children classified with oncologic conditions in this Chinese hospital’s high-priority pathway, cancer had already been confirmed by histopathology in hematology-oncology outpatient or inpatient care and was under active follow-up; the emergency department did not establish a new cancer diagnosis. A child with established cancer presenting for an unrelated reason could receive another focused category because classification used the index visit’s first recorded diagnosis.

Which vital signs contributed to the abnormal vital-sign count for pediatric emergency returns?

For children in this Chinese hospital’s high-priority pathway, the index-visit count combined fever, low oxygen saturation, age-defined tachycardia, and age-defined tachypnea. Unrecorded measurements did not add an abnormal finding.

This content is intended for healthcare professionals for educational purposes. The article and its image were developed with AI assistance and reviewed by members of the ReachMD team prior to publication. Please refer to the original source linked for the complete and most up-to-date information.