Prognostic Factors of Second and Third Line Chemotherapy Using 5-FU with Platinum, Irinotecan, and Taxane for Advanced Gastric Cancer

Ji Soo Park; Jae Yun Lim; Seung Kyo Park; Min Kyung Kim; Hee Sung Ko; Sun Och Yoon; Jong Won Kim; Seung Ho Choi; Jae Yong Cho

doi:10.4143/crt.2011.43.4.236

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Original Article Prognostic Factors of Second and Third Line Chemotherapy Using 5-FU with Platinum, Irinotecan, and Taxane for Advanced Gastric Cancer: Ji Soo Park, MD¹, Jae Yun Lim, MD^1,2, Seung Kyo Park, MD³, Min Kyung Kim, MD³, Hee Sung Ko, MD³, Sun Och Yoon, MD, PhD^4,5, Jong Won Kim, MD^2,5, Seung Ho Choi, MD, PhD^2,5, Jae Yong Cho, MD, PhD^1,2; Cancer Research and Treatment : Official Journal of Korean Cancer Association 2011;43(4):236-243.
DOI: https://doi.org/10.4143/crt.2011.43.4.236
Published online: December 27, 2011

¹Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.

²Gastric Cancer Center, Gangnam Severance Cancer Hospital, Seoul, Korea.

³Division of Medical Oncology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.

⁴Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.

⁵Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.

Correspondence: Jae Yong Cho, MD, PhD. Department of Medical Oncology, Gangnam Severance Hospital, Yonsei University College of Medicine, Dogok 1-dong, Gangnam-gu, Seoul 135-720, Korea.
Tel: 82-2-2019-4363, Fax: 82-2-3463-3882, chojy@yuhs.ac

• Received: July 20, 2011 • Accepted: September 28, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract

Purpose
The aims of this study are to find out whether the sequence of chemotherapeutic regimens including second- and third-line taxane and irinotecan influences the survival of patients with unresectable gastric carcinoma and to identify clinical characteristics of patients with improved response.
Materials and Methods
Fifty gastric carcinoma patients who were treated by third-line sequential chemotherapy between November 2004 and July 2010 were enrolled in this study. Their overall survival (OS) and time to progression (TTP) were set up as primary and secondary end points. For the sequence of chemotherapy regimen, two arms were used. Arm A was defined as 5-fluorouracil (5-FU)+cisplatin (FP) or folinic acid, 5-FU and oxaliplati (FOLFOX), followed by folinic acid, 5-FU and irinotecan (FOLFIRI), and paclitaxel or docetaxel plus 5-FU, with or without epirubicin. Arm B was defined as FP or FOLFOX, followed by paclitaxel or docetaxel plus 5-FU, and FOLFIRI.
Results
The median OS of all patients was 16.0 months (95% confidence interval, 13.6 to 18.3 months), which is longer than historical control of patients who did not receive third-line chemotherapy. The sequence of second and third-line regimen, including irinotecan and taxane, did not present significant difference in OS or TTP after failure of 5-FU with platinum chemotherapy. In survival analysis of patients' clinicopathologic characteristics, poor prognosis was shown in patients with poorly differentiated histologic features, elevated serum carcinoembryonic level, and shorter TTP of first line chemotherapy.
Conclusion
It is possible for patients to respond differently to chemotherapy due to differences in clinical features and underlying gene expression profiles. Development of individualized chemotherapy regimens based on gene expression profiles is warranted.
Key words: Stomach neoplasms, Salvage therapy, Prognosis, Oxaliplatin, Irinotecan, Taxane

Introduction

Gastric cancer is the fourth most common malignancy worldwide [1], and most common malignancy in Korea [2]. Although survival time has been lengthened, the life expectancy of advanced disease still remains within one year.

For patients with advanced gastric carcinoma or recurrent cancer, the response rate (RR) for first-line chemotherapy ranges from 33-55%, and the survival time following chemotherapy is superior to that of patients given best supportive care [3]. Despite poorer survival benefit and tolerance of second-line chemotherapy, about 20% of patients with failure of first-line chemotherapy receive second-line chemotherapy [4]. Asian studies have reported a RR of second-line chemotherapy as 5-25% and progression-free survival (PFS) of 5.2-8.8 months [5,6]. Many clinicians consider second-line chemotherapy after failure of first-line chemotherapy for patients with advanced gastric carcinoma.

There is a controversy about the benefit of sequential salvage therapy further to second-line. However, with prolonged survival time of patients and tolerable toxicity of drugs, there has been renewed interest in chemotherapy after failure of second-line treatments. It has been our empiric observation that some patients maintain good performance after failure of second-line chemotherapy, and live longer with salvage chemotherapy than other patients with supportive care. However, few studies have been conducted on third-line and sequential therapy.

The aim of the present study was to clarify the relationship between the sequence of second- and third-line chemotherapy regimen including taxane and irinotecan with survival of patients, and to identify clinical characteristics of patients with better response to salvage chemotherapy than others.

Materials and Methods

1. Patients

We retrospectively evaluated the medical records of advanced or recurred gastric carcinoma patients who were diagnosed and treated at Gangnam Severance Hospital between November 2004 and July 2010. Patients who met the following criteria were eligible: histologically proven advanced gastric adenocarcinoma with metastatic or recurrent disease; received third-line chemotherapy at Gangnam Severance Hospital using folinic acid, 5-fluorouracil (5-FU) and oxaliplatin (FOLFOX) or 5-FU+cisplatin (FP), folinic acid, 5-FU and irinotecan (FOLFIRI), paclitaxel or docetaxel with 5-FU, with or without epirubicin; measurable lesion according to the Response Evaluation Criteria in Solid Tumors (RECIST) or a non-measurable lesion, assessed using either computed tomography (CT) or magnetic resonance imaging; 18-75 years of age; Eastern Cooperative Oncology Group (ECOG) performance status≤2; life expectancy of at least 3 months; and adequate hematologic function, evident as absolute neutrophil count≥1500/µL, platelet count≥100,000/µL, hepatic function (total bilirubin≤2 times the upper normal limit [UNL], serum transaminase level≤2 times the UNL) and renal function (serum creatine≤1.5 times the UNL). Exclusion criteria were the presence of other severe medical illness, central nervous system metastasis, another active malignancy, or history of anaphylaxis to drugs. The protocols were reviewed and approved by Yonsei University Health System Institutional Review Board.

Clinical information included gender, age at diagnosis, ECOG performance status, pathologic differentiation, Lauren classification, coexisting peritoneal or hepatic metastases, date of chemotherapy, and number of cycles. In addition, laboratory data including hemoglobin, serum albumin, carcinoembryonic antigen (CEA), and cancer antigen (CA) 19-9 were also reviewed. Tumor responses were evaluated according to the RECIST guidelines.

2. Treatment

Sequential chemotherapy was defined as chemotherapy using more than two different chemotherapeutic regimens performed consecutively. Patients were assigned to either arm A or arm B, according to the sequence of three chemotherapeutic regimens. Arm A comprised FOLFOX or FP for first-line chemotherapy; FOLFIRI for second-line chemotherapy; and docetaxel or paclitaxel, leucovorin, and 5-FU (with or without epirubicin) for third-line chemotherapy. In arm B, patients were treated with FOLFOX or FP for first-line chemotherapy; docetaxel or paclitaxel, leucovorin, and FU with or without epirubicin for second-line chemotherapy; and FOLFIRI for third-line chemotherapy.

1) FOLFOX chemotherapy

Patients received oxaliplatin (100 mg/m² in 500 mL normal saline) or 5% dextrose water over 2 hours followed by leucovorin (100 mg/m²) over 2 hours on day 1 and continuous infusion of 5-FU 1,000 mg/m²/day for 2 days. The cycle was repeated every two weeks.

2) FP chemotherapy

Cisplatin (70 mg/m² in 500 mL normal saline) or 5% dextrose water was intravenously administered over 2 hours on day 1 followed by continuous infusion of 5-FU (1,000 mg/m²/day) for 2 days. The cycle was repeated every three weeks.

3) FOLFIRI chemotherapy

Irinotecan (150 mg/m² in 500 mL normal saline) was intravenously administered over 2 hours on followed by leucovorin (100 mg/m² over 2 hours) on day 1 and 5-FU (1,000 mg/m²/day) as a continuous infusion for 2 days. The cycle was repeated every two weeks.

4) Docetaxel or paclitaxel, leucovorin, and 5-FU chemotherapy, with or without epirubicin

Docetaxel (75 mg/m² in 500 mL normal saline) or paclitaxel (175 mg/m² in 500 mL normal saline) was intravenously administered over 2 hours followed by leucovorin (100 mg/m² over 2 hours) on day 1 and 5-FU (1,000 mg/m²/day) as a continuous infusion for 2 days. The cycle was repeated every 3 weeks. For some patients, epirubicin (50 mg/m² in 100 mL normal saline) was intravenously administered over 30 minutes on day 2.

5) Efficacy

Response was assessed after two cycles of chemotherapy and when disease progression was clinically suspected. A measurable lesion was defined as a lesion with the longest diameter ≥ 10 mm in any dimension assessed by spiral CT imaging. Tumor response was evaluated according to the RECIST guidelines as follows: complete response (CR) if all target lesions disappeared, partial response (PR) if the sum of diameters of the target lesions decreased by at least 30%, progressive disease (PD) if the sum of the longest diameters of the target lesions increased by at least 20% and one or more new lesions appeared, and stable disease (SD) for responses that were neither PR nor PD. The assessment was done by CT scan. The RR was defined as proportion of the patients with responses of CR or PR out of all patients.

3. Statistical analyses

Overall survival (OS) was defined as the interval from the first date of chemotherapy to death or the last follow-up date. Time to progression (TTP) was defined as the time from the first date of chemotherapy to the time of progression of the disease or the last follow-up date. The Kaplan-Meier method was used for survival analysis, and survival curves were compared assessed using the log-rank test. Following variables were included in univariate analysis: age at diagnosis, gender, performance status by ECOG criteria, pathologic differentiation, coexisting peritoneal or hepatic metastases, type of chemotherapeutic regimen, hemoglobin, serum albumin, CEA, CA19-9, and TTP of first- or second-line chemotherapy. For variables with a probability p-value≤0.3 in univariate analysis, multivariate analysis was also performed using the Cox's proportional hazard regression model (two-sided). All statistical tests were two-sided, with p-values≤0.05 considered significant.

Results

1. Baseline characteristics

Between November 2004 and July 2010, 50 patients with gastric carcinoma were treated with a sequential chemotherapy protocol, based only on FOLFOX or FP, FOLFIRI, and paclitaxel or docetaxel, at Gangnam Severance Hospital. The baseline characteristics of the patients are presented in Table 1. The median age was 52.5 years (range, 29 to 70 years), and 34 patients (68%) were male. Forty subjects (80%) had good performance status (ECOG 0-1). Seven patients had diffuse type, 13 patients had interstitial type, and the other two patients had mixed type adenocarcinoma. No significant difference except for peritoneal carcinomatosis was observed.

2. Treatment outcomes

Fifty patients received median fourth-line chemotherapy (range, 3 to 10), and a median of 18 cycles (range, 4 to 60 cycles) were administered. Median OS of all patients was 16.0 months (95% confidence interval [CI], 13.6 to 18.3 months) (Fig. 1), and median TTP was 5.0 months (95% CI, 3.9 to 6.1 months) in first-line chemotherapy, 2.4 months (95% CI, 1.6 to 3.2 months) in second-line chemotherapy, and 2.5 months (95% CI, 1.8 to 3.3 months) in third-line chemotherapy.

The median OS time of arm A and arm B was 17.1 months (95% CI, 10.7 to 23.6 months), and 15.4 months (range, 13.8 to 17.1 months), respectively. The difference was not significant (p=0.950) (Fig. 1).

TTP of arm A and arm B with first-line chemotherapy was 5.5 months (95% CI, 1.2 to 9.8 months) and 4.8 months (95% CI, 3.8 to 5.8 months), respectively (p=0.064). For the second-line chemotherapy, TTP of arm A and arm B was 2.7 months and 2.2 months, respectively (p=0.850). Each TTP of the two groups were 2.2 months in arm A and 2.7 months in arm B (p=0.297). These data did not show significant differences.

In addition, we analyzed clinicopathologic characteristics of the patients. Patients with poorly-differentiated adenocarcinoma or signet ring cell feature showed poorer prognosis than others. Furthermore, elevated CEA level and shorter TTP of first-line chemotherapy were significantly related with shorter survival times (Table 2).

3. Efficacy

The RR was 50% for first-line chemotherapy, 8% for second-line chemotherapy, and 8.5% for third-line chemotherapy. RR of first-line chemotherapy was 50% in both arms. In second-line chemotherapy, RR was 11.1% in arm A and 6.3% in arm B. In third-line chemotherapy, RR was 6.3% in arm A and 9.7% in arm B. The disease control rate (DCR) which was determined by the disease status (CR, PR, or SD) controlled by treatment, of first-line chemotherapy was 88.9% in arm A and 78.1% in arm B (p=0.342). In second-line chemotherapy, DCR of arm A was 38.9%, and that of arm B was 53.1% (p=0.333). In third-line chemotherapy, DCR was 25% in arm A and 41.9% in arm B (p=0.252). These results showed no significant differences (Table 3).

Twenty-one patients did not show any response (PR or CR) to any of the three sequential chemotherapies. They were grouped as poor-responders. The other 29 patients were classified as good-responders. The median OS was 20.0 months (95% CI, 2.4 to 37.5 months) in the good-responders and 13.9 months (95% CI, 12.0 to 15.8 months) in the poor-responders. The difference was significant (p=0.028) (Fig. 2).

Discussion

It has generally been accepted that palliative chemotherapy can significantly prolong survival of patients with advanced gastric carcinoma, longer than best supportive care [7]. Platinum-based chemotherapy is widely-used as first-line chemotherapy for advanced gastric cancer. Given the reported tolerance and survival benefits of second-line chemotherapy [4], studies have sought to identify the benefit and adequate regimen of second-line chemotherapy.

The current study evaluated two groups of gastric cancer patients who received third-line chemotherapy. Previous studies reported the median PFS of 2.5-3.3 months and the median OS of 5.3-8.7 months in gastric cancer patients who received second-line chemotherapy [6,8-10]. In this study, the median PFS was 2.4 months (95% CI, 1.6 to 3.2 months) for patients treated with second-line chemotherapy, similar to the previous report. The median OS was 16.0 months (95% CI, 13.6 to 18.3 months), and 32.0% of patients survived after 2 years. These times were slightly longer than that of historical control. We suggest that this is due to sequential treatment of the patients.

This study included a restricted population with a performance status that permitted the use of third-line chemotherapy after failure of second-line chemotherapy. Therefore, this result was subject to limitation in comparison with other survival data of patients without third-line chemotherapy. Nevertheless, based on 2.5 months of median TTP in third-line chemotherapy, the authors suggest that third-line chemotherapy would provide a survival benefit for patients with favorable performance status.

In many phase II clinical trials of second-line chemotherapy for advanced gastric cancer, RR was about 20.8%, and DCR was about 51% [4]. In the present study, RR for second-line chemotherapy was 8% and DCR was 48%. Considering only third-line chemotherapy, RR was 8.5% and DCR 36.2%.

There is still little information to support the provision of a second-line chemotherapeutic regimen after failure of platinum-based first-line chemotherapy.

Satoh et al. [11] reported that sequential chemotherapy appears to be both a feasible and effective treatment for advanced gastric cancer. Their sequential protocol was S-1 based chemotherapy for first-line chemotherapy, a low dose irinotecan/cisplatin for second-line chemotherapy, and paclitaxel for third-line chemotherapy. Thirty-two gastric cancer patients showed relatively long median survival (17.4 months; 95% CI, 323 to 723 days). This result shows that a consecutive use of chemotherapy has a substantial impact on OS of gastric cancer patients. These facts also demonstrate that second- and third-line chemotherapy is necessary to treat advanced gastric cancer.

Many clinicians consider the FOLFIRI regimen and paclitaxel or docetaxel with 5-FU regimen as second-line chemotherapy after failure of platinum-based first line chemotherapy [4]. Numerous physicians suggested that FOLFIRI is tolerable and has a modest effect as a second-line chemotherapy for gastric carcinoma. In an Asian study, the median PFS was 3.2 months, and the median OS was 9.1 months [12]. In another study, RR was 18.2%, median OS was 5.1 months, and median TTP was 2.3 months [13]. On the other hand, the tolerance and effectiveness of taxane-based chemotherapy apparent in several studies (median TTP, 2.6-3.9 months; median OS, 7.2 to 10.1 months) warrants its use as second-line chemotherapy in advanced gastric carcinoma [10,14].

Kim et al. [15] reported that overall RR and DCR for patients with docetaxel/cisplatin followed by FOLFIRI and patients with FOLFIRI followed by a docetaxel/cisplatin regimen showed no significant difference. However, to the best of our knowledge, survival benefits according to sequence of regimens of second-line and third-line chemotherapy after failure of first line chemotherapy have not been reported.

In this study, we analyzed 50 patients treated with either FOLFOX or FP chemotherapy followed by FOLFIRI, and paclitaxel or docetaxel, or FOLFOX or FP chemotherapy followed by paclitaxel or docetaxel, and FOLFIRI regimen. The median OS and TTP showed no difference regardless of sequence. However, we found some patients responded better to chemotherapy, and their OS was longer than the others. Previous investigators suggested that low hemoglobin level [8,9], low serum albumin level [16,17], high CEA level [17], poor performance status [8-10,16,17], shorter TTP of first-line chemotherapy [9,17], shorter TTP of second-line chemotherapy [16], and poor differentiation of tumor [10,16] are poor prognostic factors for patients with gastric carcinoma under sequential chemotherapy. We analyzed the previously reported factors and found some differences in survival according to histologic differentiation, elevated CEA level, and TTP of first line chemotherapy in this study.

There has been a controversy regarding the influence of the histological feature of signet ring cell on the prognosis of gastric carcinoma. Some researchers reported poorer prognosis of advanced gastric carcinoma with signet ring cell histology [16,18], while better prognosis of early gastric carcinoma with signet ring cell histology has been reported [19]. In this study, gastric adenocarcinoma with poorly differentiated or signet ring cell features had poorer response to sequential chemotherapy, and had shorter median OS than well or moderately differentiated ones. Concerning CEA level, some investigators reported the relationship of serum CEA level with tumor invasion [20], lymph node metastasis, and higher recurrence rate [21].

Herein, we suggest that differences in gene and protein expressions are other prognostic values that should be taken into account. In a recent study, the regulation of different pathways in histologically different carcinomas was reported [22]. We suppose that there are some genetic differences in diffuse gastric adenocarcinoma and that the different genetic defect influences a poorer response to sequential chemotherapy. Furthermore, CEA is a widely used tumor marker, and the CEA gene has been widely-used as a tumor-specific promoter and target of treatment over the last decade [23].

We propose that the difference in response could also be attributed to the differences in gene expression profiles between the two groups. In recent years, it has become clear that a pharmacogenic approach is a potential tool for optimizing treatment for several human tumors [24]. The ability of genetic polymorphisms to influence pharmacogenetics of 5-FU, platinum derivatives, anthracyclines, irinotecan, and docetaxel in gastric cancer has been reported. The use of multiple gene analyses in the development of individualized gastric cancer chemotherapies could be helpful in selecting patients who are more likely to benefit better to a particular therapy. The possible prediction of cancer outcome from gene expression classifiers, sets of genes, or signatures associated with prognosis together with classification rules has been suggested [25].

Limitations of this study include the retrospective study design and small patient pool. Nevertheless, the results of this study provides evidence that third-line chemotherapy, including FOLFOX or FP, FOLFIRI, paclitaxel or docetaxel regimen, helps to improve OS of patients, regardless of the sequence of use of taxane and irinotecan. In addition, OS seems to be poorly affected by poorly differentiated or signet ring cell feature of adenocarcinoma, elevated CEA level, and shorter TTP of first-line chemotherapy.

Conclusion

Different chemotherapy-responses to locally advanced or metastatic gastric carcinoma treated with second and third-line chemotherapy using irinotecan or taxane could be attributed not to sequence of chemotherapeutic regimen, but to patients' different clinical features underlying different gene expression profiles. Development of individualized chemotherapy-based regimens based on multiple gene analysis is warranted. Future studies will be required to investigate the impact of genetic difference on response to sequential chemotherapy.

Acknowledgements

Acknowledgments

This study was supported by research fund from Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (No. 2010-0024248).

NOTES

Conflict of interest relevant to this article was not reported.

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Fig. 1

Overall survival by treatment Arm.

Fig. 2

Overall survival by response to chemotherapy.

Table 1

Baseline characteristics of the patients

Variables	Arm A (n=18)		Arm B (n=32)		p-value

	No.	%	No.	%
Gender
Male	11	61.1	23	71.9	0.434
Female	7	38.9	9	28.1
Median age (range, yr)	53.0 (41-70)		52.5 (29-70)
Disease status
Advanced or metastatic	14	77.8	23	71.9	0.648
Recurred	4	22.2	9	28.1
ECOG
0	2	11.1	2	6.3	0.437
1	11	61.1	25	78.1
2	5	27.8	5	15.6
Pathology
WD-MD	6	33.3	11	34.4	0.941
PD-SRC	12	66.7	21	65.6
Liver metastasis
Yes	2	11.1	6	18.8	0.479
No	16	88.9	26	81.2
Peritoneal metastasis
Yes	15	83.3	12	37.5	0.002
No	3	16.7	20	62.5

ECOG, Eastern Cooperative Oncology Group; WD-MD, adenocarcinoma, well differentiated and adenocarcinoma, moderate differentiated; PDSRC, adenocarcinoma, poorly differentiated and signet ring cell carcinoma. ^a)p-values from Pearson's χ² test, except for age (Kruskal-Walis test).

Table 2

Survival analysis according to baseline characteristics

Variables	No.	OS (95% CI, mo)	Univariate analysis		Multivariate analysis

			Relative risk (95% CI)	p-value	Relative risk (95% CI)	p-value
Gender
Male	34	20.5 (14.3-26.7)	1	0.491
Female	16	14.5 (8.6-20.3)	0.777 (0.379-1.596)
Age (yr)
＜Median value	25	16.4 (9.6-23.3)	1	0.467
≥Median value	25	15.4 (13.5-17.4)	1.297 (0.642-2.619)
Disease status
Recurred	13	38.7 (38.7-38.7)	1	0.208
Advanced or metastatic	37	15.4 (13.4-17.5)	1.757 (0.722-4.279)
ECOG
Good (0-1)	40	17.1 (10.8-23.5)	1	0.81
Poor (2)	10	15.7 (9.2-22.2)	1.117 (0.454-2.750)
Pathologic differentiation
WD-MD	17	29.6 (16.9-42.3)	1	0.024	1	＜0.001
PD-SRC	33	13.9 (10.8-17.0)	2.327 (1.096-4.940)		5.784 (2.307-14.500)
Hepatic metastasis
Present	8	28.3 (3.3-53.2)	1	0.372
Absent	42	15.4 (12.9-18.0)	1.544 (0.591-4.034)
Peritoneal metastasis
Present	27	16.4 (12.3-20.6)	1	0.793
Absent	23	16.0 (7.6-24.4)	1.095 (0.556-2.157)
Hemoglobin
Normal	16	16.4 (14.6-18.2)	1	0.845
Decreased^a)	34	16.0 (8.6-23.3)	1.073 (0.530-2.173)
Serum albumin
Normal	44	16.4 (10.8-22.0)	1	0.168
Decreased^b)	6	11.5 (10.1-12.8)	1.962 (0.739-5.211)
Serum CEA
Normal	29	20.0 (12.2-27.7)	1	0.259	1	0.002
Elevated^c)	19	16.4 (11.4-21.4)	1.499 (0.739-3.042)		3.694 (1.609-8.482)
Serum CA19-9
Normal	24	20.0 (13.1-26.8)	1	0.261
Elevated^d)	20	14.7 (8.1-21.2)	1.546 (0.720-3.321)
TTP under first-line chemotherapy
＜Median value (5 mo)	26	21.6 (7.8-35.3)	1	0.001	1	＜0.001
≥Median value (5 mo)	24	11.5 (7.8-15.1)	3.342 (1.597-6.997)		7.248 (2.931-17.925)
TTP under second-line chemotherapy
＜Median value (3 mo)	28	15.4 (11.6-19.3)	1	0.769
≥Median value (3 mo)	22	16.4 (13.7-19.1)	1.107 (0.562-2.180)

OS, overall survival; CI, confidence interval; ECOG, Eastern Cooperative Oncology Group; WD-MD, adenocarcinoma, well differentiated and adenocarcinoma, moderate differentiated; PD-SRC, adenocarcinoma, poorly differentiated and signet ring cell carcinoma; CEA, carcinoembryonic antigen; CA, cancer antigen; TTP, time to progression. ^a)Hemoglobin≤13 g/dL in men, ≤12 g/dL in woman, ^b)Serum albumin≤3.4 g/dL, ^c)Serum CEA≥5 ng/mL, ^d)Serum CA19-9≥35 U/mL.

Table 3

Response to sequential chemotherapy of the two groups

	Chemotherapy

	1st line		2nd line		3rd line

	Arm A	Arm B	Arm A	Arm B	Arm A	Arm B
CR	3 (16.7)	-	-	-	-	-
PR	6 (33.3)	16 (50.0)	2 (11.1)	2 (6.3)	1 (6.3)	3 (9.7)
SD	7 (38.9)	9 (28.1)	5 (27.8)	15 (46.9)	3 (18.8)	10 (32.3)
PD	2 (11.1)	7 (21.9)	11 (61.1)	15 (46.9)	12 (75.0)	18 (58.1)

Values are presented as number (%). CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease.

Figure & Data

REFERENCES

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Prognostic Factors of Second and Third Line Chemotherapy Using 5-FU with Platinum, Irinotecan, and Taxane for Advanced Gastric Cancer

Cancer Res Treat. 2011;43(4):236-243. Published online December 27, 2011

DOI: https://doi.org/10.4143/crt.2011.43.4.236

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Abstract
Introduction
Materials and Methods
Results
Discussion
Conclusion
Acknowledgments
NOTES
REFERENCES

Prognostic Factors of Second and Third Line Chemotherapy Using 5-FU with Platinum, Irinotecan, and Taxane for Advanced Gastric Cancer

Fig. 1 Overall survival by treatment Arm.

Fig. 2 Overall survival by response to chemotherapy.

Fig. 1

Fig. 2

Prognostic Factors of Second and Third Line Chemotherapy Using 5-FU with Platinum, Irinotecan, and Taxane for Advanced Gastric Cancer

Variables	Arm A (n=18)		Arm B (n=32)		p-value

	No.	%	No.	%
Gender
Male	11	61.1	23	71.9	0.434
Female	7	38.9	9	28.1
Median age (range, yr)	53.0 (41-70)		52.5 (29-70)
Disease status
Advanced or metastatic	14	77.8	23	71.9	0.648
Recurred	4	22.2	9	28.1
ECOG
0	2	11.1	2	6.3	0.437
1	11	61.1	25	78.1
2	5	27.8	5	15.6
Pathology
WD-MD	6	33.3	11	34.4	0.941
PD-SRC	12	66.7	21	65.6
Liver metastasis
Yes	2	11.1	6	18.8	0.479
No	16	88.9	26	81.2
Peritoneal metastasis
Yes	15	83.3	12	37.5	0.002
No	3	16.7	20	62.5

Variables	No.	OS (95% CI, mo)	Univariate analysis		Multivariate analysis

			Relative risk (95% CI)	p-value	Relative risk (95% CI)	p-value
Gender
Male	34	20.5 (14.3-26.7)	1	0.491
Female	16	14.5 (8.6-20.3)	0.777 (0.379-1.596)
Age (yr)
＜Median value	25	16.4 (9.6-23.3)	1	0.467
≥Median value	25	15.4 (13.5-17.4)	1.297 (0.642-2.619)
Disease status
Recurred	13	38.7 (38.7-38.7)	1	0.208
Advanced or metastatic	37	15.4 (13.4-17.5)	1.757 (0.722-4.279)
ECOG
Good (0-1)	40	17.1 (10.8-23.5)	1	0.81
Poor (2)	10	15.7 (9.2-22.2)	1.117 (0.454-2.750)
Pathologic differentiation
WD-MD	17	29.6 (16.9-42.3)	1	0.024	1	＜0.001
PD-SRC	33	13.9 (10.8-17.0)	2.327 (1.096-4.940)		5.784 (2.307-14.500)
Hepatic metastasis
Present	8	28.3 (3.3-53.2)	1	0.372
Absent	42	15.4 (12.9-18.0)	1.544 (0.591-4.034)
Peritoneal metastasis
Present	27	16.4 (12.3-20.6)	1	0.793
Absent	23	16.0 (7.6-24.4)	1.095 (0.556-2.157)
Hemoglobin
Normal	16	16.4 (14.6-18.2)	1	0.845
Decreased^a)	34	16.0 (8.6-23.3)	1.073 (0.530-2.173)
Serum albumin
Normal	44	16.4 (10.8-22.0)	1	0.168
Decreased^b)	6	11.5 (10.1-12.8)	1.962 (0.739-5.211)
Serum CEA
Normal	29	20.0 (12.2-27.7)	1	0.259	1	0.002
Elevated^c)	19	16.4 (11.4-21.4)	1.499 (0.739-3.042)		3.694 (1.609-8.482)
Serum CA19-9
Normal	24	20.0 (13.1-26.8)	1	0.261
Elevated^d)	20	14.7 (8.1-21.2)	1.546 (0.720-3.321)
TTP under first-line chemotherapy
＜Median value (5 mo)	26	21.6 (7.8-35.3)	1	0.001	1	＜0.001
≥Median value (5 mo)	24	11.5 (7.8-15.1)	3.342 (1.597-6.997)		7.248 (2.931-17.925)
TTP under second-line chemotherapy
＜Median value (3 mo)	28	15.4 (11.6-19.3)	1	0.769
≥Median value (3 mo)	22	16.4 (13.7-19.1)	1.107 (0.562-2.180)

	Chemotherapy

	1st line		2nd line		3rd line

	Arm A	Arm B	Arm A	Arm B	Arm A	Arm B
CR	3 (16.7)	-	-	-	-	-
PR	6 (33.3)	16 (50.0)	2 (11.1)	2 (6.3)	1 (6.3)	3 (9.7)
SD	7 (38.9)	9 (28.1)	5 (27.8)	15 (46.9)	3 (18.8)	10 (32.3)
PD	2 (11.1)	7 (21.9)	11 (61.1)	15 (46.9)	12 (75.0)	18 (58.1)

Table 1 Baseline characteristics of the patients

Table 2 Survival analysis according to baseline characteristics

Table 3 Response to sequential chemotherapy of the two groups

Values are presented as number (%). CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease.