IL6 and acute kidney injury: When forced in the final model, C3 (OR per log 0.25; 95% CI 0.01–4.66), IL-6 (OR per log 0.83; 95% CI 0.51–1.34), ferritin (OR per log 1.63; 95% CI 0.84–3.32), or PEEP level (OR per mmHg 1.04; 95% CI 0.91–1.22) were not associated with AKI and did not change the model.