Prognostic Factors and a Nomogram Predicting Overall Survival in Patients with Limb Chondrosarcomas: A Population-Based Study

Figure 6

Calibration plot of the nomogram predicting overall survival in patients with limb chondrosarcoma. Internal validation of (a) actual 3-year and (b) 5-year overall survival; external validation of (c) actual 3-year and (d) 5-year overall survival. The dashed line represents an excellent match between nomogram prediction (-axis) and actual survival outcome (-axis). The group was divided into three groups with equal sample size for internal and external validation. Closer distances from the points to the dashed line indicate higher prediction accuracy.

(a)

(b)

(c)

(d)