Reviewer's report
Title:Application of Weibull Model for Survival of Patients with Gastric Cancer
Version: 1Date:11 October 2010
Reviewer: Reza Fatemi
Reviewer's report:
This is a retrospective study dealing with survival of gastric cancer patients using
Cox and Weibull models. The results from both Weibull and Cox models
indicated that patients with a past history of gastric cancer had a decreased risk
of survival significantly followed by poorly or moderately differentiated histologic
grade. Eradicative degree of surgery, pathologic stage, depth of tumor invasion
and tumor location were also identified as significant independent prognostic
factors. This is a well written paper and the topic is interesting in statistical and
methodological aspects.
Our comments regarding this paper:
1. The authors compared application of two statistical models in survival analysis,
but in discussion section these comparisons were not well discussed and there
are some similar studies that cited in this paper, which can be used in discussion
too. I suggest to expand this section and cite these two papers:
Pourhoseingholi MA, Hajizadeh E, Moghimi Dehkordi B, Safaee A, Abadi A, Zali
MR. Comparing Cox regression and parametric models for survival of patients
with gastric carcinoma. Asian Pac J Cancer Prev. 2007 Jul-Sep;8(3):412-6.
Moghimi-Dehkordi B, Safaee A, Pourhoseingholi MA, Fatemi R, Tabeie Z, Zali
MR. Statistical comparison of survival models for analysis of cancer data. Asian
Pac J Cancer Prev. 2008 Jul-Sep;9(3):417-20.
2. Please check all reverences and the style of representing them according to
the journal. The name of authors in some references like ref number 3 and ref
number 16 were not right. The true style is:
Pourhoseingholi MA, Moghimi-Dehkordi B, Safaee A, Hajizadeh E, Solhpour A,
Zali MR. Prognostic factors in gastric cancer using log-normal censored
regression model. Indian J Med Res. 2009 Mar;129(3):262-7.
Pourhoseingholi MA, Hajizadeh E, Moghimi Dehkordi B, Safaee A, Abadi A, Zali
MR. Comparing Cox regression and parametric models for survival of patients
with gastric carcinoma. Asian Pac J Cancer Prev. 2007 Jul-Sep;8(3):412-6.
Reviewer's report
Title:Application of Weibull Model for Survival of Patients with Gastric Cancer
Version: 1Date:11 October 2010
Reviewer: Reza Fatemi
Reviewer's report:
This is a retrospective study dealing with survival of gastric cancer patients using
Cox and Weibull models. The results from both Weibull and Cox models
indicated that patients with a past history of gastric cancer had a decreased risk
of survival significantly followed by poorly or moderately differentiated histologic
grade. Eradicative degree of surgery, pathologic stage, depth of tumor invasion
and tumor location were also identified as significant independent prognostic
factors. This is a well written paper and the topic is interesting in statistical and
methodological aspects.
Our comments regarding this paper:
1. The authors compared application of two statistical models in survival analysis,
but in discussion section these comparisons were not well discussed and there
are some similar studies that cited in this paper, which can be used in discussion
too. I suggest to expand this section and cite these two papers:
Pourhoseingholi MA, Hajizadeh E, Moghimi Dehkordi B, Safaee A, Abadi A, Zali
MR. Comparing Cox regression and parametric models for survival of patients
with gastric carcinoma. Asian Pac J Cancer Prev. 2007 Jul-Sep;8(3):412-6.
Moghimi-Dehkordi B, Safaee A, Pourhoseingholi MA, Fatemi R, Tabeie Z, Zali
MR. Statistical comparison of survival models for analysis of cancer data. Asian
Pac J Cancer Prev. 2008 Jul-Sep;9(3):417-20.
2. Please check all reverences and the style of representing them according to
the journal. The name of authors in some references like ref number 3 and ref
number 16 were not right. The true style is:
Pourhoseingholi MA, Moghimi-Dehkordi B, Safaee A, Hajizadeh E, Solhpour A,
Zali MR. Prognostic factors in gastric cancer using log-normal censored
regression model. Indian J Med Res. 2009 Mar;129(3):262-7.
Pourhoseingholi MA, Hajizadeh E, Moghimi Dehkordi B, Safaee A, Abadi A, Zali
MR. Comparing Cox regression and parametric models for survival of patients
with gastric carcinoma. Asian Pac J Cancer Prev. 2007 Jul-Sep;8(3):412-6.
Please review this paper.
user
Reviewer's report
Title:Application of Weibull Model for Survival of Patients with Gastric Cancer
Version: 1Date:11 October 2010
Reviewer: Reza Fatemi
Reviewer's report:
This is a retrospective study dealing with survival of gastric cancer patients using
Cox and Weibull models. The results from both Weibull and Cox models
indicated that patients with a past history of gastric cancer had a decreased risk
of survival significantly followed by poorly or moderately differentiated histologic
grade. Eradicative degree of surgery, pathologic stage, depth of tumor invasion
and tumor location were also identified as significant independent prognostic
factors. This is a well written paper and the topic is interesting in statistical and
methodological aspects.
Our comments regarding this paper:
1. The authors compared application of two statistical models in survival analysis,
but in discussion section these comparisons were not well discussed and there
are some similar studies that cited in this paper, which can be used in discussion
too. I suggest to expand this section and cite these two papers:
Pourhoseingholi MA, Hajizadeh E, Moghimi Dehkordi B, Safaee A, Abadi A, Zali
MR. Comparing Cox regression and parametric models for survival of patients
with gastric carcinoma. Asian Pac J Cancer Prev. 2007 Jul-Sep;8(3):412-6.
Moghimi-Dehkordi B, Safaee A, Pourhoseingholi MA, Fatemi R, Tabeie Z, Zali
MR. Statistical comparison of survival models for analysis of cancer data. Asian
Pac J Cancer Prev. 2008 Jul-Sep;9(3):417-20.
2. Please check all reverences and the style of representing them according to
the journal. The name of authors in some references like ref number 3 and ref
number 16 were not right. The true style is:
Pourhoseingholi MA, Moghimi-Dehkordi B, Safaee A, Hajizadeh E, Solhpour A,
Zali MR. Prognostic factors in gastric cancer using log-normal censored
regression model. Indian J Med Res. 2009 Mar;129(3):262-7.
Pourhoseingholi MA, Hajizadeh E, Moghimi Dehkordi B, Safaee A, Abadi A, Zali
MR. Comparing Cox regression and parametric models for survival of patients
with gastric carcinoma. Asian Pac J Cancer Prev. 2007 Jul-Sep;8(3):412-6.
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