INS and type 2 diabetes mellitus: In univariate linear regression analysis, BMI, pre‐existing type 1 or type 2 diabetes and severity of respiratory failure assessed by ordinal scale (0—self ventilating, 1—mechanical ventilation, 2—neuromuscular blockade, 3—nebulized epoprostenol, 4—prone ventilation, 5—extracorporeal membrane oxygenation) were all associated with insulin dose when analysed by the average dose across the whole ICU stay or by the highest cumulative insulin dose over a 24‐h period (Appendix S1: Table S1).