Impact of obesity and diabetes mellitus in critically ill patients with SARS-CoV-2

Purpose: Evaluate the associations of obesity and diabetes with the risk of mortality in critically ill patients infected with SARS-CoV-2. Materials and methods: This cohort study included 115 adult patients admitted to the ICU with SARS-CoV-2 pneumonia. Anthropometric variables and biochemical (C-reactive protein, ferritin, leukocyte, neutrophils, and fibrinogen) were measured. Multivariate logistic regression analyses were used to investigate the associations. Results: Mean age was 50.6 +/- 11.2 years, 68.7% were male. Median BMI was 30.9 kg/m(2). All patients had invasive mechanical ventilation. Patients with diabetes had increased risk of mortality with OR of 2.86 (CI 95% 1.1-7.4, p = 0.026); among those patients who, in addition to diabetes had obesity, the risk was de 3.17 (CI 95% 1.9-10.2, p = 0.038). Patients with obesity had 1.25 times greater risk of developing a severe SARS-CoV-2 infection (95% CI 1.09-1.46, p = 0.025). Negative correlation was observed between BMI and the PaO2/FiO2 ratio (r = 0.023, p < 0.05). Obese patients required more days of mechanical ventilation and longer hospital stay compared to non-obese patients. Conclusions: Diabetes and obesity are risk factors for increasing severity of SARS-CoV-2 infection, and they are both associated with an increase in mortality.