Fig. 1From: Perioperative fluid administration and complications in emergency gastrointestinal surgery—an observational studyThe predicted risk of overall complications associated with the perioperative fluid balance following emergency gastrointestinal surgery. The blue line shows the predicted risk of a complication. The shaded area is the 95% confidence interval. We used a generalized additive model with smoothing splines and four degrees of freedom. The parametric effect is p < 0.001 and the non-parametric effect is p = 0.572. The parametric calculation tests whether the fluid balance is linear associated with complications. The non-parametric analysis tests whether smoothing splines adds further precision to a linear relation of the model. A p-value < 0.01 is considered significantBack to article page