5.

Multivariate analyses of factors associated with OS in ypT0 patients

Factors	Total	HR	95% CI	P
OS, overall survival; CEA, carcinoembryonic antigen; BT, blood transfusion; HR, hazard ratio; 95% CI, 95% confidence interval.
CEA (ng/mL)				0.395
≤5	40	1
>5	19	2.43	0.32–18.64
Interval between neoadjuvant therapy and surgery (weeks)				0.095
≤8	34	1
>8	25	7.25	0.71–74.37
ypN category				0.105
N–	51	1
N+	8	5.62	0.70–45.15
Perioperative BT				0.087
No	49	1
Yes	10	5.42	0.78–37.49