Survival outcomes and prognostic indicators for gastric cancer patients with positive peritoneal wash cytology but no peritoneal metastasis after radical gastrectomy

Table 1 Patient characteristics (n = 48)

Characteristic	Patients
Age
< 60 yr	23
≥ 60 yr	25
Smoking history
Yes	26
No	22
Drinking history
Yes	26
No	22
Family history
Yes	18
No	30
Treament
Sugery	48
Neoadjuvant chemotherapy	12
Adjuvant chemotherapy	30
Adjuvant chemoradiotherapy	4
Site of tumor
Upper	5
Middle	16
Lower	27
Bormann classification
Type 1	3
Type 2	9
Type 3	20
Type 4	12
Lauren’s classification
Type 1	9
Type 2	22
Type 3	13
Pathological N factor
0-3a	25
3b	23
Pathological T factor
0-3	8
4a-4b	38

Lauren’s classification: Type 1: Intestinal-type adenocarcinoma; Type 2: Diffuse adenocarcinoma; Type 3: Mixed adenocarcinoma.

Table 2 Neoadjuvant chemotherapy

Neoadjuvant chemotherapy regimen	Patients
SOX	5
DOS	1
XELOX	1
PTX + L-OHP + S-1	2
Paclitaxel liposome + L-OHP + S-1	1
PTX + DDP + S-1	1
DXT + S-1/5-Fu + L-OHP + CPT-11	1

Table 3 Types of surgery

Surgery type	Patients
Laparoscopic assist distal gastrectomy + D2	16
Laparoscopic assist total gastrectomy + D2	9
Traditional distal gastrectomy + D2	11
Traditional total gastrectomy + D2	10
Laparoscopic assisted proximal gastrectomy + splenectomy + D2	1
Laparoscopic assisted proximal gastrectomy + D2	1

Table 4 Adjuvant chemotherapy

Adjuvant chemotherapy regimen	Patients
SOX	12
SOX + radiotherapy	4
XELOX	3
Paclitaxel liposome + L-OHP + S-	1
S-1	2
PTX + 5-Fu + L-OHP	1
DXT + S-1	1
PTX + CAP	1
DXT + L-OHP + CAP	1
S-1 + DDP	2
Unknown	6

Table 5 Univariate analysis of the risk factors for overall survival

Patient characteristic		OR	95%CI	P value
Age				0.588
< 60 yr	23	1.000
≥ 60 yr	25	0.822	0.404-1.671
Smoking history				0.935
Yes	26	1.000
No	22	0.971	0.476-1.979
Drinking history				0.137
Yes	26	1.000
No	22	1.726	0.841-3.540
Site of tumor				0.021
Upper/Middle	21	1.000
Lower	27	0.427	0.207-0.880
Signet-ring cell				0.229
Yes	19	1.000
No	28	0.640	0.309-1.325
Bormann classification				0.416
Type1/2/3	32	1.000
Type4	12	1.431	0.603-3.392
Lauren’s classification				0.080
Type 1	9	1.000
Type 2/Type 3	35	2.588	0.892-7.508
Pathological N factor				0.001
0-3a	24	1.000
3b	22	4.194	1.870-9.406
Pathological T factor				0.028
0-3	9	1.000
4a-4b	37	5.008	1.190-21.072
Vascular invasion				0.046
Negative	12	1.000
Positive	34	2.554	1.017-6.413
CA199				0.002
Elevate	13	1.000
Normal	31	0.267	0.118-0.604
CEA				0.837
Elevated	13
Normal	32	0.917	0.403-2.089
Therapy				0.112
Surgery along	12
Combined therapy	36	0.540	0.252-1.154

OR: Odds ratio; CI: Confidence interval.

Table 6 Multivariate analysis of the risk factors for overall survival (N = 39, n = 25)

Patient characteristic		OR	95%CI	P value
Site of tumor				0.105
Upper/Middle	18
Lower	21
Lauren’s classification				0.476
Type 1	8
Type 2/Type 3	31
Pathological N factor				0.001
0-3a	19	1.000
3b	20	5.365	1.971-14.609
Pathological T factor				0.146
0-3	9
4a-4b	30
Vascular invasion				0.031
Negative	10	1.000
Positive	29	3.660	1.124-11.917
CA199
Elevated	12			0.789
Normal	27

n: The number of subjects who died; OR: Odds ratio; CI: Confidence interval.