Table 2.

Independent prognostic factors.

Prognostic Factors	Classification	X2	p	RR	CI
Completeness of cytoreduction	CC-0 vs. CC-1	0.002	NS	0.983	0.497–1.912
PCI after NIPS	≤11 vs. ≥12	0.133	NS	1.148	0.545–2.419
Small bowel PCI after NIPS	≤2 vs. ≥3	0.941	NS	1.331	0.747–2.375
PCI before NIPS	≤13 vs. ≥14	5.189	0.023	1.789	1.085–2.953
Histological effects	no responder vs. responder	2.041	NS	0.702	0.433–1.140
Lymph node metastasis	pN0, pN1 vs. pN2, pN3	2.481	NS	1.358	0.978–1.989
Histologic type	Differentiated vs. poorly	0.669	NS	1.305	0.669–2.542
Cytology before NIPS	Negative vs. positive	0.7	NS	0.822	0.519–1.300
Cytology after NIPS	Negative vs. positive	10.637	0.001	2.631	0.471–4.705
Peritoneal/Cytologic status	Macroscopic PM vs. P0Cy1	0.367	NS	0.807	0.405–1.611
No. of involved peritoneal sectors	≤5 vs. ≥6	0.37	NS	1.336	0.526–3.393

PCI: Peritoneal Cancer Index; CC: Completeness of cytoreduction; PM: peritoneal metastasis; NIPS: neoadjuvant intraperitoneal/systemic chemotherapy; P0Cy1: no peritoneal metastasis but positive cytology.