Interfacility Transfers Among Patients With Complex Chronic Conditions

Abstract

Objectives: To describe interfacility transfers among children with complex chronic conditions (CCCs) and determine if interfacility transfer was associated with health outcomes. We hypothesized that interfacility transfer would be associated with length of stay (LOS), receipt of critical care services, and in-hospital mortality.

Methods: In this retrospective cohort study, we used data from the 2012 Kids' Inpatient Database. CCC hospitalizations were identified by International Classification of Diseases, Ninth Revision codes. Receipt of critical care services was inferred by using International Classification of Diseases, Ninth Revision diagnosis and procedure codes. We performed a descriptive analysis of CCC hospitalizations then determined if transfer was associated with LOS, mortality, or receipt of critical care services using survey-adapted quasi-Poisson or logistic regression models, controlling for hospital and patient demographics.

Results: There were 551 974 non-birth hospitalizations with at least 1 CCC diagnosis code. Of these, 13% involved an interfacility transfer. Compared with patients with CCCs who were not transferred, patients with CCCs who were transferred in and ultimately discharged from the receiving hospital had an adjusted LOS rate ratio of 1.6 (95% confidence interval [CI]: 1.5-1.7; P < .001), were more likely to have received critical care services (adjusted odds ratio 3.0; 95% CI: 2.7-3.2; P < .001), and had higher in-hospital mortality (adjusted odds ratio 3.6; 95% CI: 3.2-3.9; P < .001) (controlling for patient and hospital characteristics).

Conclusions: Many hospitalizations for children with CCCs involve interfacility transfer. Compared with in-house admissions, hospitalizations of patients who are transferred in and ultimately discharged from the receiving hospital involve longer LOS, greater odds of receipt of critical care services, and in-hospital mortality. Further evaluation of the role of clinical and transfer logistic factors is needed to improve outcomes.