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. Author manuscript; available in PMC: 2010 Aug 30.
Published in final edited form as: Acad Med. 2010 May;85(5):863–868. doi: 10.1097/ACM.0b013e3181d73a45

Figure 2. The learning curve for positive surgical margins, separately for surgeons with and without fellowship training, with 95% confidence intervals.

Figure 2

Predicted probability of a positive surgical margin, calculated from a statistical model, is plotted against surgeon experience. Probabilities are for a patient with typical cancer severity in the entire cohort of 7765 (mean PSA, pathological stage and grade). Black lines: fellowship trained; Gray lines: non-fellowship trained. The dashed gray line is for the single non-fellowship trained surgeon with greater than 120 surgeries. The confidence intervals are given by thin black and gray lines.