Validation of a nomogram for predicting outcome of vulvar cancer patients, primarily treated by surgery, in Korean population: multicenter retrospective study through Korean Gynecologic Oncology Group (KGOG-1010)
Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram f...
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Published in | Journal of Gynecologic Oncology Vol. 19; no. 3; pp. 191 - 194 |
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Main Authors | , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Korea (South)
Asian Society of Gynecologic Oncology; Korean Society of Gynecologic Oncology and Colposcopy
01.09.2008
Korean Society of Gynecologic Oncology and Colposcopy 대한부인종양학회 |
Subjects | |
Online Access | Get full text |
ISSN | 2005-0380 2005-0399 |
DOI | 10.3802/jgo.2008.19.3.191 |
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Abstract | Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram for predicting RFS in Korean patients with vulvar cancer.
A total of 204 cases newly diagnosed as vulvar cancer between 1982 and 2006 were identified. Among them 70 cases were not eligible due to inappropriate cell type (40 cases) and radiation as primary therapy (30 cases). Forty-four cases were not evaluable due to inadequate data and persistent disease. Finally a total of 90 patients primarily treated by surgery were included for analysis. Variables including age and the characteristics of primary tumor, nodal status, and surgical margin were collected for predicting RFS based on nomogram, which was compared with actual RFS. A calibration plot was drawn showing the actual versus predicted probability for 6 groups of patients segregated according to their predicted probabilities. In addition, discrimination of the nomogram was quantified with the concordance index.
Patients' mean age was 58 years and mean follow-up period was 47.9 months. Observed 2y- and 5y-RFS rates were 81% and 68%, respectively, corresponding to 79% and 72% in the original cohort. The trend line in calibration plot showed comparable concordance with an ideal line, having a slope of 1.04 for 2y-RFS (R(2)=.35) and 0.98 for 5y-RFS (R(2)=.80), respectively. The concordance index was 0.79 in the KGOG data set, which was improved to 0.82 with the data set limited to squamous cell carcinoma.
The nomogram provides the predictive capacity for relapse-free survival in Korean patients with vulvar cancer. |
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AbstractList | Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram for predicting RFS in Korean patients with vulvar cancer.OBJECTIVERegarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram for predicting RFS in Korean patients with vulvar cancer.A total of 204 cases newly diagnosed as vulvar cancer between 1982 and 2006 were identified. Among them 70 cases were not eligible due to inappropriate cell type (40 cases) and radiation as primary therapy (30 cases). Forty-four cases were not evaluable due to inadequate data and persistent disease. Finally a total of 90 patients primarily treated by surgery were included for analysis. Variables including age and the characteristics of primary tumor, nodal status, and surgical margin were collected for predicting RFS based on nomogram, which was compared with actual RFS. A calibration plot was drawn showing the actual versus predicted probability for 6 groups of patients segregated according to their predicted probabilities. In addition, discrimination of the nomogram was quantified with the concordance index.METHODSA total of 204 cases newly diagnosed as vulvar cancer between 1982 and 2006 were identified. Among them 70 cases were not eligible due to inappropriate cell type (40 cases) and radiation as primary therapy (30 cases). Forty-four cases were not evaluable due to inadequate data and persistent disease. Finally a total of 90 patients primarily treated by surgery were included for analysis. Variables including age and the characteristics of primary tumor, nodal status, and surgical margin were collected for predicting RFS based on nomogram, which was compared with actual RFS. A calibration plot was drawn showing the actual versus predicted probability for 6 groups of patients segregated according to their predicted probabilities. In addition, discrimination of the nomogram was quantified with the concordance index.Patients' mean age was 58 years and mean follow-up period was 47.9 months. Observed 2y- and 5y-RFS rates were 81% and 68%, respectively, corresponding to 79% and 72% in the original cohort. The trend line in calibration plot showed comparable concordance with an ideal line, having a slope of 1.04 for 2y-RFS (R(2)=.35) and 0.98 for 5y-RFS (R(2)=.80), respectively. The concordance index was 0.79 in the KGOG data set, which was improved to 0.82 with the data set limited to squamous cell carcinoma.RESULTSPatients' mean age was 58 years and mean follow-up period was 47.9 months. Observed 2y- and 5y-RFS rates were 81% and 68%, respectively, corresponding to 79% and 72% in the original cohort. The trend line in calibration plot showed comparable concordance with an ideal line, having a slope of 1.04 for 2y-RFS (R(2)=.35) and 0.98 for 5y-RFS (R(2)=.80), respectively. The concordance index was 0.79 in the KGOG data set, which was improved to 0.82 with the data set limited to squamous cell carcinoma.The nomogram provides the predictive capacity for relapse-free survival in Korean patients with vulvar cancer.CONCLUSIONThe nomogram provides the predictive capacity for relapse-free survival in Korean patients with vulvar cancer. Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram for predicting RFS in Korean patients with vulvar cancer. A total of 204 cases newly diagnosed as vulvar cancer between 1982 and 2006 were identified. Among them 70 cases were not eligible due to inappropriate cell type (40 cases) and radiation as primary therapy (30 cases). Forty-four cases were not evaluable due to inadequate data and persistent disease. Finally a total of 90 patients primarily treated by surgery were included for analysis. Variables including age and the characteristics of primary tumor, nodal status, and surgical margin were collected for predicting RFS based on nomogram, which was compared with actual RFS. A calibration plot was drawn showing the actual versus predicted probability for 6 groups of patients segregated according to their predicted probabilities. In addition, discrimination of the nomogram was quantified with the concordance index. Patients' mean age was 58 years and mean follow-up period was 47.9 months. Observed 2y- and 5y-RFS rates were 81% and 68%, respectively, corresponding to 79% and 72% in the original cohort. The trend line in calibration plot showed comparable concordance with an ideal line, having a slope of 1.04 for 2y-RFS (R(2)=.35) and 0.98 for 5y-RFS (R(2)=.80), respectively. The concordance index was 0.79 in the KGOG data set, which was improved to 0.82 with the data set limited to squamous cell carcinoma. The nomogram provides the predictive capacity for relapse-free survival in Korean patients with vulvar cancer. Objective: Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram for predicting RFS in Korean patients with vulvar cancer. Methods: A total of 204 cases newly diagnosed as vulvar cancer between 1982 and 2006 were identified. Among them 70 cases were not eligible due to inappropriate cell type (40 cases) and radiation as primary therapy (30 cases). Fortyfour cases were not evaluable due to inadequate data and persistent disease. Finally a total of 90 patients primarily treated by surgery were included for analysis. Variables including age and the characteristics of primary tumor, nodal status, and surgical margin were collected for predicting RFS based on nomogram, which was compared with actual RFS. A calibration plot was drawn showing the actual versus predicted probability for 6 groups of patients segregated according to their predicted probabilities. In addition, discrimination of the nomogram was quantified with the concordance index. Results: Patients’ mean age was 58 years and mean follow-up period was 47.9 months. Observed 2y- and 5y-RFS rates were 81% and 68%, respectively, corresponding to 79% and 72% in the original cohort. The trend line in calibration plot showed comparable concordance with an ideal line, having a slope of 1.04 for 2y-RFS (R2=.35) and 0.98 for 5y-RFS (R2=.80), respectively. The concordance index was 0.79 in the KGOG data set, which was improved to 0.82 with the data set limited to squamous cell carcinoma. Conclusion: The nomogram provides the predictive capacity for relapse-free survival in Korean patients with vulvar cancer. Objective: Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated in a Western study, there was no validation in Korean population. Thus, we have undertaken the study to assess the applicability of nomogram for predicting RFS in Korean patients with vulvar cancer. Methods: A total of 204 cases newly diagnosed as vulvar cancer between 1982 and 2006 were identified. Among them 70 cases were not eligible due to inappropriate cell type (40 cases) and radiation as primary therapy (30 cases). Fortyfour cases were not evaluable due to inadequate data and persistent disease. Finally a total of 90 patients primarily treated by surgery were included for analysis. Variables including age and the characteristics of primary tumor, nodal status, and surgical margin were collected for predicting RFS based on nomogram, which was compared with actual RFS. A calibration plot was drawn showing the actual versus predicted probability for 6 groups of patients segregated according to their predicted probabilities. In addition, discrimination of the nomogram was quantified with the concordance index. Results: Patients’ mean age was 58 years and mean follow-up period was 47.9 months. Observed 2y- and 5y-RFS rates were 81% and 68%, respectively, corresponding to 79% and 72% in the original cohort. The trend line in calibration plot showed comparable concordance with an ideal line, having a slope of 1.04 for 2y-RFS (R2=.35) and 0.98 for 5y-RFS (R2=.80), respectively. The concordance index was 0.79 in the KGOG data set, which was improved to 0.82 with the data set limited to squamous cell carcinoma. Conclusion: The nomogram provides the predictive capacity for relapse-free survival in Korean patients with vulvar cancer. KCI Citation Count: 0 |
Author | Byoung-Gie Kim Jae Weon Kim Mi Kyung Kim Sang-Young Ryu N. W. Lee K.T. Kim Young-Tak Kim Ki Heon Lee Moon-Seok Cha Jong Min Lee Eun Seop Song Young Tae Kim Won Gyu Kim Moon-Hong Kim Soon-Beom Kang Jae Hoon Kim |
AuthorAffiliation | 8 Department of Obstetrics and Gynecology, Yongdong Severance Hospital, Korea 12 Department of Obstetrics and Gynecology, Asan Medical Center, Korea 5 Department of Obstetrics and Gynecology, Samsung Seoul Hospital, Korea 9 Department of Obstetrics and Gynecology, Inha University Hospital, Korea 6 Department of Obstetrics and Gynecology, College of Medicine, Kwandong University, Cheil General Hospital & Women's Healthcare Center, Korea 2 Department of Obstetrics and Gynecology, East-West Neo Medical Center, Korea 7 Department of Obstetrics and Gynecology, Severance Hospital, Korea 11 Department of Obstetrics and Gynecology, Kosin University Gospel Hospital, Korea 4 Department of Obstetrics and Gynecology, Dong-A University Medical Center, Korea 13 Department of Obstetrics and Gynecology, Hanyang University Hospital, Korea 1 Department of Obstetrics and Gynecology, Seoul National University Hospital, Korea 3 Department of Obstetrics and Gynecology, Korea University Ansan Hospital, Korea 10 Departme |
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CitedBy_id | crossref_primary_10_3389_fmed_2021_777605 crossref_primary_10_3389_fmed_2022_919150 crossref_primary_10_1016_j_ygyno_2009_11_027 crossref_primary_10_1016_j_ygyno_2012_02_022 crossref_primary_10_1016_j_ygyno_2022_02_008 crossref_primary_10_3390_curroncol32010021 crossref_primary_10_1002_ijgo_13722 |
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ContentType | Journal Article |
Contributor | Byoung-Gie Kim Eun-Seop Song Jae Weon Kim Kim, Young Tae Young-Tae Kim Kim, Jae Hoon Jae-Hoon Kim Sang-Young Ryu Kyung-Tai Kim Nak-Woo Lee Young-Tak Kim Moon-Seok Cha Ki Heon Lee Mi-Kyung Kim Jong-Min Lee Won Gyu Kim Moon-Hong Kim Soon-Beom Kang |
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Copyright | Copyright © 2008 Korean Society of Gynecologic Oncology and Colposcopy 2008 |
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Snippet | Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and validated... Objective: Regarding vulvar cancer, a nomogram has been suggested for the prediction of relapse-free survival (RFS). While the nomogram has been developed and... |
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SubjectTerms | External validation Nomogram Original Prediction Vulvar cancer 산부인과학 |
Title | Validation of a nomogram for predicting outcome of vulvar cancer patients, primarily treated by surgery, in Korean population: multicenter retrospective study through Korean Gynecologic Oncology Group (KGOG-1010) |
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