Research Article

Prognostic Analysis of Different Metastatic Patterns in Invasive Intraductal Papillary Mucinous Neoplasm: A Surveillance, Epidemiology, and End Results Database Analysis

Figure 3

Graphically assessed proportional hazards assumption for OS and CCS based on variables of metastasis. (a) ln (-ln (survival)) for OS. (b) ln (-ln (survival)) for CCS.
(a)
(b)