Table 5.

Results of Cox multivariate analysis

Variable	RFS P value	DRS P value
Mitotic rate/50HPF	0.0000	0.0000
Gold’s point	0.0000	0.0000
Fletcher’s risk	0.0000	0.0000
Miettinen’s risk	0.0001	0.0009
Size > 5 cm	0.0001	0.0009
Preoperative diagnoses as duodenal tumors or DGISTs	0.0048	> 0.05
Age > 60 yr	0.0428	0.0059
LR or PD	> 0.05	0.0346
ICU stay	> 0.05	0.0054

HPF: High-power fields; DRS: Disease-related survival; RFS: Relapse-free survival; ICU: Intensive care unit; LR: Limited resection; PD: Pancreaticoduodenectomy.