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Diabetes Care. 2016 Oct;39(10):1671-6. doi: 10.2337/dc16-0668. Epub 2016 Jul 15.

An Evaluation of Recurrent Diabetic Ketoacidosis, Fragmentation of Care, and Mortality Across Chicago, Illinois.

Author information

1
Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL.
2
Center for Health Information Partnerships, Institute for Public Health, Northwestern University Feinberg School of Medicine, Chicago, IL.
3
Center for Health Information Partnerships, Institute for Public Health, Northwestern University Feinberg School of Medicine, Chicago, IL Division of Internal Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL.
4
Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL a-wallia@northwestern.edu.

Abstract

OBJECTIVE:

A portion of patients with diabetes are repeatedly hospitalized for diabetic ketoacidosis (DKA), termed recurrent DKA, which is associated with poorer clinical outcomes. This study evaluated recurrent DKA, fragmentation of care, and mortality throughout six institutions in the Chicago area.

RESEARCH DESIGN AND METHODS:

A deidentified Health Insurance Portability and Accountability Act-compliant data set from six institutions (HealthLNK) was used to identify 3,615 patients with DKA (ICD-9 250.1x) from 2006 to 2012, representing 5,591 inpatient admissions for DKA. Demographic and clinical data were queried. Recurrence was defined as more than one DKA episode, and fragmentation of health care was defined as admission at more than one site.

RESULTS:

Of the 3,615 patients, 780 (21.6%) had recurrent DKA. Patients with four or more DKAs (n = 211) represented 5.8% of the total DKA group but accounted for 26.3% (n = 1,470) of the encounters. Of the 780 recurrent patients, 125 (16%) were hospitalized at more than one hospital. These patients were more likely to recur (odds ratio [OR] 2.96; 95% CI 1.99, 4.39; P < 0.0001) and had an average of 1.88-times the encounters than nonfragmented patients. Although only 13.6% of patients died of any cause during the study period, odds of death increased with age (OR 1.06; 95% CI 1.05, 1.07; P < 0.001) and number of DKA encounters (OR 1.28; 95% CI 1.04, 1.58; P = 0.02) after adjustment for age, sex, insurance, race, fragmentation, and DKA visit count. This study was limited by lack of medical record-level data, including comorbidities without ICD-9 codes.

CONCLUSIONS:

Recurrent DKA was common and associated with increased fragmentation of health care and increased mortality. Further research is needed on potential interventions in this unique population.

PMID:
27422579
DOI:
10.2337/dc16-0668
[Indexed for MEDLINE]

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