OBJECTIVE: We examined cell ratio factors (CRF) significantly affecting gastric cancer (EC) patients GCP) survival. CRF - ratio between cancer cells (CC) and blood cells subpopulations. METHODS: We analyzed data of 799 consecutive GCP (T1-4N0-2M0) (age=57.1±9.4 years; tumor size=5.4±3.1 cm) radically operated (R0) and monitored in 1975-2022 (m=558, f=241; total gastrectomies=173, distal gastrectomies=461; proximal gastrectomies=165; combined gastrectomies=247 with resection of esophagus, pancreas, liver, duodenum, diaphragm, colon transversum, splenectomy, etc; only surgery-S=624, adjuvant chemoimmunotherapy-AT=175 (5-FU + thymalin/taktivin); T1=238, T2=220, T3=184, T4=157; N0=437, N1=109, N2=253, M0=799; G1=222, G2=164, G3=413. Variables selected for prognosis study were input levels of 45 blood parameters, sex, age, TNMG, cell type, tumor size. Survival curves were estimated by the Kaplan-Meier method. Differences in curves between groups of GCP were evaluated using a log-rank test. Multivariate Cox modeling, discriminant analysis, clustering, SEPATH, Monte Carlo, bootstrap and neural networks computing were used to determine any significant dependence. RESULTS: Overall life span (LS) was 2128.9±2300.3 days and cumulative 5-year survival (5YS) reached 58.4%, 10 years – 51.9%, 20 years – 39%, 30 years – 27.2%. 318 GCP lived more than 5 years (LS=4304.5±2290.6 days), 169 GCP – more than 10 years (LS=5919.5±2020 days). 290 GCP died because of GC (LS=651±347.2 days). Cox modeling displayed that G CP survival significantly depended on CRF: healthy cells/CC, erythrocytes/CC, monocytes/CC, phase transition (PT) in terms of synergetics early—invasive cancer; PT N0--N12, age, G1-3, hemorrhage time, ESS, sex, AT, prothrombin index, residual nitrogen. Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early—invasive cancer (rank=1); PT N0--N12 (2); healthy cells/CC (3), erythrocytes/CC (4), thrombocytes/CC (5), monocytes/CC (6), segmented neutrophils/CC (7), leucocytes/CC (8), lymphocytes/CC (9), stick neutrophils/CC (10), eosinophils/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0). CONCLUSIONS: GCP survival after radical procedures significantly depended on CRF.

1. Gastric Cancer Prognosis and Cell Ratio Factors
Kshivets Oleg Surgery Department, Roshal Hospital, Roshal, Moscow, Russia
P-23
OBJECTIVE: We examined cell ratio factors (CRF) significantly affecting gastric cancer
(EC) patients GCP) survival. CRF - ratio between cancer cells (CC) and blood cells
subpopulations.
METHODS: We analyzed data of 799 consecutive GCP (T1-4N0-2M0) (age=57.1±9.4
years; tumor size=5.4±3.1 cm) radically operated (R0) and monitored in 1975-2022 (m=558,
f=241; total gastrectomies=173, distal gastrectomies=461; proximal gastrectomies=165;
combined gastrectomies=247 with resection of esophagus, pancreas, liver, duodenum,
diaphragm, colon transversum, splenectomy, etc; only surgery-S=624, adjuvant
chemoimmunotherapy-AT=175 (5-FU + thymalin/taktivin); T1=238, T2=220, T3=184,
T4=157; N0=437, N1=109, N2=253, M0=799; G1=222, G2=164, G3=413. Variables selected
for prognosis study were input levels of 45 blood parameters, sex, age, TNMG, cell type,
tumor size. Survival curves were estimated by the Kaplan-Meier method. Differences in
curves between groups of GCP were evaluated using a log-rank test. Multivariate Cox
modeling, discriminant analysis, clustering, SEPATH, Monte Carlo, bootstrap and neural
networks computing were used to determine any significant dependence.
RESULTS: Overall life span (LS) was 2128.9±2300.3 days and cumulative 5-year survival
(5YS) reached 58.4%, 10 years – 51.9%, 20 years – 39%, 30 years – 27.2%. 318 GCP lived
more than 5 years (LS=4304.5±2290.6 days), 169 ECP – more than 10 years
(LS=5919.5±2020 days). 290 GCP died because of GC (LS=651±347.2 days). Cox modeling
displayed that ECP survival significantly depended on CRF: healthy cells/CC,
erythrocytes/CC, monocytes/CC, phase transition (PT) in terms of synergetics early—
invasive cancer; PT N0--N12, age, G1-3, hemorrhage time, ESS, sex, AT, prothrombin
index, residual nitrogen. Neural networks, genetic algorithm selection and bootstrap
simulation revealed relationships between 5YS and PT early—invasive cancer (rank=1);
PT N0--N12 (2); healthy cells/CC (3), erythrocytes/CC (4), thrombocytes/CC (5),
monocytes/CC (6), segmented neutrophils/CC (7), leucocytes/CC (8), lymphocytes/CC (9),
stick neutrophils/CC (10), eosinophils/CC (11). Correct prediction of 5YS was 100% by
neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: GCP survival after radical procedures significantly depended on CRF.
Cox Proportional Hazards
Results, n=799
Parameter
Estimate
Standard
Error
Chi-
square
P value
95%
Lower CL
95%
Upper CL
Hazard
Ratio
ESS -0.012083 0.004865 6.16915 0.013000 -0.021618 -0.002548 0.987990
Hemorrhage Time 0.001295 0.000371 12.20046 0.000478 0.000568 0.002021 1.001296
Residual Nitrogen 0.049233 0.008903 30.58332 0.000000 0.031784 0.066681 1.050465
Prothrombin Idex 0.021321 0.004897 18.95581 0.000013 0.011723 0.030920 1.021550
Age 0.012628 0.006097 4.28971 0.038344 0.000678 0.024577 1.012708
Sex 0.304544 0.122528 6.17776 0.012937 0.064394 0.544694 1.356006
G1-3 0.163023 0.065880 6.12346 0.013340 0.033902 0.292145 1.177064
Procedure Type 0.229288 0.072502 10.00130 0.001564 0.087186 0.371390 1.257704
Adjuvant Treatment -0.518082 0.177398 8.52903 0.003495 -0.865775 -0.170388 0.595662
PhT Early-Invasive Cancer 1.282134 0.239070 28.76183 0.000000 0.813565 1.750703 3.604323
PhT N0---N12 0.453418 0.066399 46.63044 0.000000 0.323278 0.583559 1.573682
Cox Regression B SE Wald df P Exp(B) 95,0% CI
Lower Upper
Erythrocytes/CC ,089 ,039 5,331 1 ,021 1,093 1,014 1,179
Monocytes/CC ,213 ,100 4,548 1 ,033 1,237 1,017 1,505
Healthy Cells/CC -,043 ,012 12,956 1 ,000 ,958 ,936 ,981
Survival Function
GCP=799; 5YS=58.4%;
10YS=52.2%; 20YS=40.3%; 30YS=27.2%.
Complete Censored
-5 0 5 10 15 20 25 30 35 40
Years after Gastrectomies
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
Cumulative
Proportion
Surviving
Cumulative Proportion Surviving (Kaplan-Meier)
Complete Censored
10-Year Survival of Early GCP=88.4%;
10-Year Survival of Invasive GCP=41.5%;
P=0.000 by Log Rank Test.
0 5 10 15 20 25 30 35
Years after Gastrectomies
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
Cumulative
Proportion
Surviving
Invasive GCP
Early GCP
Cumulative Proportion Surviving (Kaplan-Meier)
Complete Censored
10-Year survival GCP N0=69.7%;
10-Year Survival GCP N1-2=29.5%;
P=0.000 by Log Rank.
0 5 10 15 20 25 30 35 40
Years after Gastrectomies
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
Cumulative
Proportion
Surviving
GCP N1-2
GCP N0
Cumulative Proportion Surviving (Kaplan-Meier)
10-Year Survival GCP after AT=59.7%;
10-Year Survival after Surgery=50.6%;
P=0.032 by Log Rank Test.
Complete Censored
0 5 10 15 20 25 30
Years after Gastrectomies
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
Cumulative
Proportion
Surviving
only Surgery
AT
Neural Networks: n=611;
Baseline Error=0.000;
Area under ROC Curve=1.000;
Correct Classification Rate=100%
Rank Sensitivity
Phase Transition Early-Invasive Cancer 1 58263
Phase Transition N0—N12 2 51328
Healthy Cells/Cancer Cells 3 33644
Erythrocytes/Cancer Cells
Thrombocytes/Cancer Cells
Monocytes/Cancer Cells
Segmented Neutrophils/Cancer Cells
Leucocytes/Cancer Cells
Lymphocytes/Cancer Cells
4
5
6
7
8
9
25968
20448
12218
13604
12400
10482
Stick Neutrophils/Cancer Cells
Eosinophils/Cancer Cells
10
11
10002
8630