Fig. 3

The continuous mean risk curve of IOC as a function of the DS. The blue dots are representing the discrete data from Table 4. The red dots are representing the assumed values. The solid black curve depicts a corresponding Weibull CDF [42], which represents the continuous mean risk curve of IOC. Different background colors are denoting the four-level scale (Low, Moderate, High, Extremely high).IOC, intraoperative complication; DS, difficulty score; CDF, cumulative distribution function