Letter to the editor: Unexpected high mortality in COVID-19 and diabetic ketoacidosis To the EditorPatients with diabetes mellitus (DM) appear to be at a greater risk for severe symptoms and complications, including death from 2]. DM is a common comorbidity in patients affected with COVID-19 and may cause ketosis, ketoacidosis, and diabetic ketoacidosis (DKA) [3]. In patients with DM, acute hyperglycemic crises such as DKA and hyperosmolar hyperglycemic state can be precipitated by an acute illness such as COVID-19 and it can result in catastrophic outcomes. At Jacobi Medical Center, an epicenter of the COVID-19 pandemic crisis, we noted that a significant proportion of patients with COVID-19 also presented with DKA. We identified 50 such patients admitted with COVID-19 from March 10th to April 30th of 2020 who concomitantly had DKA upon admission or developed DKA during their hospital course. DKA was defined as blood glucose N250 mg/dL, an elevated anion gap, and positive ketones in blood or urine. COVID-19 was confirmed by real-time reverse-transcription polymerase chain reaction (PCR) assay (BioReference Laboratories, Elmwood Park, NJ).Among the evaluated patients, 32 (64%) were male, the median age was 59 years (IQR 42.3-70), 16 (31%) were Hispanic, 15 (30%) were African American, and the median body mass index (BMI) was 27.15 kg/m 2 (see Table 1). Six of the 50 patients (12%) had a previous diagnosis of Type 1 DM with a median hemoglobin A1C (HbA1C) before the admission of 11%. Forty-four (88%) patients had previously diagnosed type 2 DM and their median HbA1c before the admission was 8.05%. Eight patients (16%) had previously undiagnosed DM. Twenty (40%) patients were on oral hypoglycemic agents with only 2 on SGLT2 inhibitors (which are known to increase the risk of ketoacidosis), 24 (48%) were on a home insulin regimen, and 4 (8%) patients were receiving treatment with GLP-1 agonists.The median value of the initial glucose on presentation in our sample population was 506.5 mg/dL (252.0-1485.0 mg/dL). Forty-three (86%) patients were treated with intravenous insulin infusion protocol and 7 (14%) were treated with subcutaneous insulin protocol. The mean insulin and the intravenous fluids requirements in the first 24 h were 115. 5Author contributions NCP, SP, JA, and PK contributed to the design and implementation of the data collection, and to the analysis of the results. All author's discussed the results and contributed to the final manuscript.

Objective: To explore the possible associations of serum 25-hydroxyvitamin D [25(OH)D] concentration with coronavirus disease 2019 in-hospital mortality and need for invasive mechanical ventilation. Patients and Methods: A retrospective, observational, cohort study was conducted at 2 tertiary academic medical centers in Boston and New York. Eligible participants were hospitalized adult patients with laboratory-confirmed COVID-19 between February 1, 2020, and May 15, 2020. Demographic and clinical characteristics, comorbidities, medications, and disease-related outcomes were extracted from electronic medical records. Results: The final analysis included 144 patients with confirmed COVID-19 (median age, 66 years; 64 [44.4%] male). Overall mortality was 18%, whereas patients with 25(OH)D levels of 30 ng/mL (to convert to nmol/L, multiply by 2.496) and higher had lower rates of mortality compared with those with 25(OH)D levels below 30 ng/mL (9.2% vs 25.3%; P¼.02). In the adjusted multivariable analyses, 25(OH)D as a continuous variable was independently significantly associated with lower in-hospital mortality (odds ratio, 0.94; 95% CI, 0.90 to 0.98; P¼.007) and need for invasive mechanical ventilation (odds ratio, 0.96; 95% CI, 0.93 to 0.99; P¼.01). Similar data were obtained when 25(OH)D was studied as a continuous variable after logarithm transformation and as a dichotomous (<30 ng/mL vs !30 ng/mL) or ordinal variable (quintiles) in the multivariable analyses. Conclusion: Among patients admitted with laboratory-confirmed COVID-19, 25(OH)D levels were inversely associated with in-hospital mortality and the need for invasive mechanical ventilation. Further observational studies are needed to confirm these findings, and randomized clinical trials must be conducted to assess the role of vitamin D administration in improving the morbidity and mortality of COVID-19.

Purpose Infectious diseases are more frequent and can be associated with worse outcomes in patients with diabetes. The aim of this study was to systematically review and conduct a meta-analysis of the available observational studies reporting the effect of diabetes on mortality among hospitalized patients with COVID-19. Methods The Medline, Embase, Google Scholar, and medRxiv databases were reviewed for identification of eligible studies. A random effects model meta-analysis was used, and I 2 was utilized to assess the heterogeneity. In-hospital mortality was defined as the endpoint. Sensitivity, subgroup, and meta-regression analyses were performed. Results A total of 18,506 patients were included in this meta-analysis (3713 diabetics and 14,793 non-diabetics). Patients with diabetes were associated with a higher risk of death compared with patients without diabetes (OR 1.65; 95% CI 1.35–1.96; I 2 77.4%). The heterogeneity was high. A study-level meta-regression analysis was performed for all the important covariates, and no significant interactions were found between the covariates and the outcome of mortality. Conclusion This meta-analysis shows that that the likelihood of death seems to be higher in diabetic patients hospitalized with COVID-19 compared with non-diabetic patients. Further studies are needed to assess whether this association is independent or not, as well as to investigate the role of adequate glycemic control prior to infection with COVID-19. Electronic supplementary material The online version of this article (10.1007/s42000-020-00246-2) contains supplementary material, which is available to authorized users.