Effective prediction of postoperative complications for patients after open hepatectomy: a simplified scoring system based on perioperative parameters

Table 1 General traits of the patients in test group and validation group

Variables	Categories	Test set	Validation set	Total	P value
Gender	Male	103	32	135	0.104
Gender	Female	47	25	72
Age		53.89 ± 12.38	54.32 ± 11.29		0.823
History of serious lung diseases	No	147	57	204	0.563
History of serious lung diseases	Yes	3	0	3
History of serious heart diseases	No	143	54	197	1.000
History of serious heart diseases	Yes	7	3	10
HBV	No	86	33	119	1.000
HBV	Yes	64	24	88
HCV	No	148	57	205	1.000
HCV	Yes	2	0	2
Hepatic cirrhosis	No	86	34	120	0.875
Hepatic cirrhosis	Yes	64	23	87
Diabetes	No	138	52	190	0.785
Diabetes	Yes	12	5	17
Tumor	No	54	25	79	0.338
Tumor	Yes	96	32	128
Operative time (minutes)		239.94 ± 100.60	250.70 ± 114.00		0.517
Length of hospital (days)		19.79 ± 9.32	21.95 ± 11.13		0.160