IGF1 and Hypoglycemia: The ROC analysis of the risk estimation by pre-operative IGF-1 revealed an AUC of 0.79 (95%CI: 0.64–0.94, p = 0.0033) and hence showed a good accuracy to detect hypoglycemia one year after bariatric surgery (Figure 3D; ROC-AUC of 1.00 represents a perfect test and 0.50 an insignificant test).