Clinical significance of preoperative nutritional status in elderly gastric cancer patients undergoing radical gastrectomy: A single-center retrospective study

Table 5 Multivariate Cox regression analyses of clinical factors associated with length of stay

Factor	LOS (days)	Hazard ratio (95%CI)	P value
Age (years)1
< 70	7 (7, 9)	1.000 (reference)
≥ 70	8 (7, 10)	1.216 (1.048-1.411)	0.010
Operation time (min)1
< 160	7 (7, 8)	1.000 (reference)
≥ 160	8 (7, 11)	1.431 (1.237-1.656)	< 0.001
Comorbidity
0-2	8 (7, 9)	1.000 (reference)
≥ 3	8 (7, 11)	1.067 (0.839-1.357)	0.595
PNI1
≥ 44.5	8 (7, 11)	1.000 (reference)
< 44.5	9 (8, 13)	1.792 (1.058-3.032)	0.030
Prealbumin (mg/L)
≥ 180	8 (7, 9)	1.000 (reference)
< 180	8 (7, 10)	0.797 (0.514-1.237)	0.312
Clavien-Dindo classification
None	8 (7, 9)	1.000 (reference)
I + II	10 (7, 12)	1.163 (1.163-1.701)	0.435
III or higher	10 (7, 17)	2.191 (1.604-2.991)	< 0.001

¹Split at median.

LOS: Length of stay; PNI: Prognostic nutritional index.