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. 2022 Jan 3;11:757383. doi: 10.3389/fonc.2021.757383

Table 2.

Univariate and multivariate Cox proportional hazards regression analysis of overall survival.

Characteristics Median OS months Univariate HR (95% CI) P-value Multivariate aHR&(95% CI) P-value&
Treatment 2.586 (1.362–4.908) 0.004 4.288 (1.452–12.671) 0.008
 MiniPDX-guided group, n=21 9.4 (7.9–11.2)
 Experimental treatment group, n=47 7.9 (7.2–8.7)
Age 1.613 (0.947–2.747) 0.078 NA NA
 <65, n=31 8.9 (7.9–9.5)
 ≥65, n=37 7.4 (6.9–8.7)
Sex 0.747 (0.442–1.263) 0.277 NA NA
 Male, n=39 8.2 (6.9–9.2)
 Female, n=29 8.6 (7.9–9.9)
ECOG PS 1.294 (0.710–2.359) 0.400 NA NA
 0–1, n=52 8.7 (7.4–9.2)
 2, n=16 8.2 (7.2–9.5)
Primary gastric tumors size 2.008 (1.163–3.469) 0.012 1.624 (0.674–3.915) 0.280
 <5 cm, n=31 8.9 (8.2–10.2)
 ≥5 cm, n=37 7.6 (6.9–8.9)
Differentiation of primary tumor 2.780 (1.612–4.791) 0.000 2.488 (1.077–5.746) 0.033
 Well, n=11 10.7 (6.9–11.5)
 Moderate, n=47 8.6 (7.6–9.2)
 Poor, n=10 6.3 (3.7–7.9)
T-stage of primary tumor 1.211 (0.887–1.654) 0.277 NA NA
 pT1, n=9 8.9 (7.2–10.6)
 pT2, n=16 8.9 (6.9–10.7)
 pT3, n=33 8.2 (7.4–9.2)
 pT4, n=10 6.9 (5.3–8.7)
N-stage of primary tumor 1.441 (1.087–1.912) 0.011 1.467 (1.007–2.138) 0.046
 N0, n=10 9.3 (6.9–10.9)
 N1, n=28 8.2 (7.4–9.4)
 N2, n=17 7.9 (6.3–9.5)
 N3, n=13 7.6 (4.9–8.7)
Number of metastases 1.149 (0.820–1.639) 0.426 NA NA
 Solitary, n=31 9.8 (6.3–11.2)
 2–5, n=24 9.2 (6.8–9.9)
 >5, n=13 8.2 (7.4–8.9)
Metastases tumors size 1.830 (1.078–3.107) 0.025 1.351 (0.589–3.103) 0.478
 <5 cm, n=34 9.2 (7.9–9.9)
 ≥ 5cm, n=34 7.6 (6.4–8.7)
Metastases lesions location 0.876 (0.627–1.224) 0.438 NA NA
 Left lobe, n=15 7.9 (4.9–9.8)
 Right lobe, n=18 8.2 (7.9–8.9)
 Both, n=35 8.6 (7.2–9.5)
Interruption of hepatic hilum 0.599 (0.335–1.071) 0.084 NA NA
 Yes, n=24 7.9 (6.8–8.2)
 No, n=44 8.9 (7.9–9.4)
Relapse or refractory disease 1.136 (0.736–1.563) 0.535 NA NA
 Relapse, n=26 8.6 (6.8–10.7)
 Refractory, n=42 8.2 (7.4–9.9)
CEA level* 0.810 (0.461–1.425) 0.466 NA NA
 Negative, n=16 8.6 (6.9–9.2)
 Positive, n=38 8.2 (7.4–9.4)
CA199# 1.021 (0.585–1.781) 0.942 NA NA
 Negative, n=17 8.6 (7.6–9.3)
 Positive, n=40 7.9 (7.2–9.4)

*CEA levels were measured in 16 and 38 patients, respectively, in MiniPDX-guided and experimental treatment groups. A CEA level of <5 ng/ml was considered as negative.

#CA19-9 levels were measured in 17 and 40 patients, respectively, in MiniPDX-guided and experimental treatment groups. A CA19-9 level of <37 U/ml was considered as negative.

&These results were adjusted by multiple variables identified in univariate analyses, including treatment group, primary gastric tumors size, differentiation of primary tumor, N-stage of primary tumor, metastases tumors size.

CA19-9, carbohydrate antigen 19-9; CEA, carcinoma embryonic antigen; ECOG PS, Eastern Cooperative Oncology Group physical status; PDX, patient-derived xenograft; OS, overall survival; NA, not applicated.