Table 4.

The relationship between the clinicopathological factors and the preoperative/preoperative PNI in the validation study

	Preoperative PNI			Postoperative PNI
	High	Low	p-value	High	Low	p-value
Gender
Male	52	18		87	13
Female	54	5	0.012	73	13	0.679
Age (years)
≤70	65	8		99	16
>70	41	15	0.035	61	10	1.000
Location of primary tumor
Colon	57	15		81	13
Rectum	49	8	0.361	79	13	1.000
Tumor depth
≤T3	78	15		110	20
T4	28	8	0.447	50	6	0.493
Histological type
Well, Moderately	98	22		147	25
Poorly, Mucinous	8	1	1.000	13	1	0.696
The number of lymph node metastases
0	42	10		62	5
1-3	45	10		67	16
≥4	19	3	0.844	31	5	0.116
Preoperative CEA (ng/ml)
≤5	74	15		112	14
>5	22	8	0.286	39	4	1.000
Preoperative CA19-9 (U/ml)
≤37	89	21		141	14
>37	4	2	0.340	8	3	0.088
The amount of blood lost (ml)
≤100	50	11		87	10
>100	54	12	1.000	67	16	0.094
Length of operation (min)
≤240	75	13		103	15
>240	29	10	0.210	51	11	0.379
Complication(s)
No	78	15		112	17
Yes	28	8	0.447	47	9	0.647
Infectious complication(s)
No	84	19		120	22
Yes	22	4	1.000	39	4	0.453
The number of hospitalization days (days)
≤17	56	10		92	9
>17	50	13	0.493	68	17	0.035
The number of postoperative days before the initiation of dietary intake (days)
≤3	73	18		120	14
>3	33	5	0.455	40	12	0.034
Adjuvant chemotherapy
No	78	13		40	5
Yes	28	10	0.131	120	21	0.628

CI confidence interval, CEA carcinoembryonic antigen, CA19-9 carbohydrate antigen 19–9, PNI prognostic nutritional index