Table 1 Baseline characteristics of gastric cancer patients with positive cytology but without gross peritoneal metastasis treated with surgery and chemotherapy and those treated with surgery alone.

From: Observational Study of Peritoneal Washing Cytology-Positive Gastric Cancer without Gross Peritoneal Metastasis in Patients who Underwent Radical D2 Gastrectomy

Variables, n (%)

Cytology (+)

P-value

Chemotherapy (+)

Surgery alone

n = 64 (%)

n = 24 (%)

Age (years)

   <61

35 (54.7)

8 (33.3)

0.076

   ≥61

29 (45.3)

16 (66.7)

Sex

   Male

47 (73.4)

19 (79.2)

0.582

   Female

17 (26.6)

5 (20.8)

Tumor location

   GEJ, whole stomach

25 (39.1)

8 (33.3)

0.623

   Body, antrum

39 (60.9)

16 (66.7)

Tumor grade

   Well/moderately differentiated

11 (17.2)

10 (41.7)

0.017

   Poorly/un-differentiated

53 (82.3)

14 (58.3)

Lauren classification

   Intestinal

20 (31.3)

11 (45.8)

0.205

   Non-intestinal (diffuse or mixed)

44 (68.8)

13 (54.2)

T stage

   T1/2/3

8 (12.5)

1 (4.2)

0.253

   T4

56 (81.5)

23 (95.8)

N stage

   N0/1/2

13 (20.3)

3 (12.5)

0.401

   N3

51 (79.7)

21 (87.5)

LVI + /LVI−

53 (82.8)/11 (17.2)

13 (54.2)/11 (45.8)

0.006

PNI + /PNI−

57 (89.1)/7 (10.9)

22 (91.7)/2 (8.3)

0.721

  1. GEJ, gastroesophageal junction; LVI, lymphovascular invasion; PNI, perineural invasion.