OBJECTIVES: To determine across and within hospital differences in the predictors of 365-day admission frequency for diabetic ketoacidosis (DKA) in children at US children's hospitals.

STUDY DESIGN: Multicenter retrospective cohort analysis of 12 449 children 2-18 years of age with a diagnosis of DKA in 42 US children's hospitals between 2004 and 2012. The main outcome of interest was the maximum number of DKA admissions experienced by each child within any 365-day interval during a 5-year follow-up period. The association between patient characteristics and the maximum number of DKA admissions within a 365-day interval was examined across and within hospitals.

RESULTS: In the sample, 28.3% of patients admitted for DKA experienced at least 1 additional DKA admission within the following 365 days. Across hospitals, patient characteristics associated with increasing DKA admission frequency were public insurance (OR 1.97, 95% CI 1.71-2.26), non-Hispanic black race (OR 2.40, 95% CI 2.02-2.85), age ≥12 (OR 1.98, 95% CI 1.7-2.32), female sex (OR 1.41, 95% CI 1.29-1.55), and mental health comorbidity (OR 1.36, 95% CI 1.13-1.62). Within hospitals, non-Hispanic black race was associated with higher odds of 365-day admission in 59% of hospitals, and public insurance was associated with higher odds in 56% of hospitals. Older age, female sex, and mental health comorbidity were associated with higher odds of 365-day admission in 42%, 29%, and 15% of hospitals, respectively.

CONCLUSIONS: Across children's hospitals, certain patient characteristics are associated with more frequent DKA admissions. However, these factors are not associated with increased DKA admission frequency for all hospitals.

<p><strong>OBJECTIVE: </strong>We sought to characterize variation in hospital resource utilization and readmission for diabetic ketoacidosis (DKA) across US children's hospitals.</p>

<p><strong>METHODS: </strong>The study sample included a retrospective cohort of children aged 2 to 18 years with a diagnosis of DKA at 38 children's hospitals between 2004 and 2009. The main outcomes were resource utilization as determined by total standardized cost per hospitalization, overall and non-ICU length of stay (LOS), and readmission for DKA within 30 and 365 days.</p>

<p><strong>RESULTS: </strong>There were 24,890 DKA admissions, and 20.3% of these were readmissions within 1 year. The mean hospital-level total standardized cost was $7142 (range $4125-$11,916). The mean hospital-level LOS was 2.5 days (1.5-3.7), and the non-ICU portion was 1.9 days (0.7-2.7). The mean hospital-level readmission within 365 days was 18.7% (6.5%-41.1%) and within 30 days was 2.5% (0.0%-7.1%). Hospital bed days overall, and in particular the non-ICU portion, accounted for the majority of the total standardized cost per hospitalization (overall 57%; non-ICU 36%) and explained most of the variation in resource use. Even after adjusting for difference in patient characteristics across hospitals, widespread differences existed across hospitals in total standardized cost, LOS, and readmission rates (P &lt; .001).</p>

<p><strong>CONCLUSIONS: </strong>Readmission for DKA within a year of hospitalization is common. US children's hospitals vary widely in resource use, hospital LOS, and readmission rates for patients with DKA. Our study highlights the need for additional research to understand these differences and to identify the most cost-effective strategies for managing diabetes across the continuum of care.</p>