Prognostic factors related with survival in patients with pancreatic adenocarcinoma

Table 1 Surgical and pathological factors in pancreatic cancer

Ref.	No. of patients	Results
Surgical margin/resection (R1 vs R0)
Menon et al[12]	27	mOS, 14 mo vs NR
Raut et al[13]	360	mOS, 21.5 mo vs 27.8 mo
Lymph nodes status and lymph node ratio
Riediger et al[17]	204	LNR was an independent prognostic factor
Valsangkar et al[18]	14907	LNR was strongly correlated with survival
Perineural and blood vessel invasion
Chatterjee et al[21]	86	mOS, 34 mo for BVI (-) vs 22 mo for BVI (+);
		mOS, 32 mo for PNI (-) vs 22 mo for PNI (+)
Tumor localization
Park et al[8]	340	It was an important prognostic factor by univariate analysis
Zhang et al[7]	302	It was an independent prognostic indicator
Operative factors
Nagai et al[23]	271	OBL greater than 2000 mL was an independent prognostic factor for OS
Keck et al[24]	270	PBT was an independent prognostic indicator for survival

mOS: Median overall survival; NR: Not reach; LNR: Lymph node ratio; BVI: Blood vessel invasion; PNI: Perineural invasion; OBL: Operative blood loss; PBT; Perioperative blood transfusion.