Table 2 Univariate and multivariate analysis of factors associated with peritoneal recurrence in the training cohort.

Age

 ≤ 60

Reference

 > 60

0.828 (0.481—1.425)

0.496

Gender

 Male

Reference

 Female

0.833 (0.452—1.536)

0.559

Tumor site

 Body

Reference

Reference

 Cardia

0.885 (0.442—1.771)

0.730

0.653 (0.291—1.463)

0.300

 Antrum

0.466 (0.234—0.928)

0.030

0.443 (0.201—0.977)

0.044

 Whole

2.286 (0.794—6.580)

0.125

0.809 (0.241—2.714)

0.731

Lauren type

 Intestinal

Reference

Reference

 Diffuse

1.911 (0.983—3.717)

0.056

0.864 (0.380—1.966)

0.728

Mixed

1.951 (0.920—4.136)

0.081

1.084 (0.442—2.659)

0.860

Uncertain

1.682 (0.520—5.435)

0.385

0.596 (0.140—2.543)

0.485

T stage

 T1–3

Reference

Reference

 T4

6.716 (2.678—16.843)

 < 0.001

4.330 (0.734—25.542)

0.106

N stage

 N0

Reference

Reference

 N1–2

3.524 (1.501—8.275)

0.004

3.776 (0.662—21.529)

0.135

N3

7.618 (3.291—17.635)

 < 0.001

7.851 (1.114—55.325)

0.039

Pathological stage

 I

Reference

Reference

 II

3.538 (0.887—14.121)

0.074

0.508 (0.045—5.675)

0.582

III

11.141 (3.209—38.672)

 < 0.001

0.406 (0.015—10.949)

0.592

Vascular/lymphatic invasion

 No

Reference

Reference

 Yes

2.039 (1.112—3.739)

0.021

0.899 (0.412—1.958)

0.788

Perineural invasion

No

Reference

Reference

Yes

2.081 (0.994—4.358)

0.052

1.329 (0.551—3.206)

0.526

Adjuvant chemotherapy

 Yes

Reference

 No

0.949 (0.543—1.656)

0.853

Preoperative CEA

 Normal

Reference

Reference

 Elevated

2.336 (1.343—4.065)

0.003

2.446 (1.150—5.201)

0.020

Preoperative CA199

 Normal

Reference

 Elevated

1.418 (0.814—2.472)

0.218

Postoperative CEA

 Normal

Reference

Reference

 Elevated

1.990 (1.100—3.599)

0.023

1.057 (0.458—2.440)

0.896

Postoperative CA199

 Normal

Reference

Reference

 Elevated

2.692 (1.310—5.534)

0.007

2.703 (1.134—6.447)

0.025