Figure 4From: Circulating retinol binding protein 4 in critically ill patients before specific treatment: prognostic impact and correlation with organ function, metabolism and inflammationAssociation of serum RBP4 with diabetes, obesity and insulin resistance in critically ill patients. (a and b) Serum RBP4 levels do not differ between patients with or without preexisting type 2 diabetes on admittance to the ICU (a) or with preexisting obesity as defined by a body mass index > 30 kg/m2 (b). Boxplots are displayed, where the bold line indicates the median per group, the box represents 50% of the values, and horizontal lines show minimum and maximum values of the calculated nonoutlier values; asterisks and open circles indicate outlier values. (c and d) Serum RBP4 concentrations in ICU patients are correlated with C-peptide concentrations and inversely with the insulin sensitivity as calculated by the homeostasis model assessment (HOMA) index. Spearman rank correlation test, correlation coefficient r and P values are given.Back to article page