Skip Navigation


Japanese Journal of Clinical Oncology Advance Access originally published online on August 17, 2009
Japanese Journal of Clinical Oncology 2009 39(10):690-694; doi:10.1093/jjco/hyp084
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
39/10/690    most recent
hyp084v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Request Permissions
Google Scholar
Right arrow Articles by Sato, N.
Right arrow Articles by Tsukuma, H.
PubMed
Right arrow PubMed Citation
Right arrow Articles by Sato, N.
Right arrow Articles by Tsukuma, H.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?


© The Author (2009). Published by Oxford University Press. All rights reserved

Gender Differences in Stomach Cancer Survival in Osaka, Japan: Analyses Using Relative Survival Model

Naomi Sato, Yuri Ito, Akiko Ioka, Masahiro Tanaka and Hideaki Tsukuma

Department of Cancer Control and Statistics, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan

For reprints and all correspondence: Naomi Sato, 3-3 Nakamichi 1-chome, Higashinari-ku, Osaka 537-8511, Japan. E-mail: satou-na{at}mc.pref.osaka.jp

Received April 20, 2009; accepted June 23, 2009

Relative 5-year survival for stomach cancer has increased gradually in Osaka for more than two decades, while women show a small but consistently lower survival for it. We analyzed gender differences in stomach cancer survival, using relative survival model proposed by Dickman et al. Study subjects were reported stomach cancer cases diagnosed in 1975–99. We estimated the excess hazard ratios (EHRs) of death using Poisson's regression model. The crude EHR for women was 1.12 [95% confidence interval (CI): 1.09–1.14] in comparison with men. After adjustments for year and age at diagnosis, the EHR for women decreased to 1.07 (95% CI: 1.05–1.09), and furthermore, it reached to an insignificant level of 1.02 (95% CI: 0.99–1.04) after an additional adjustment for the extent of disease (localized, regional, distant and unknown). With further adjustments by histological type (intestinal, diffuse and others/unknown), method of detection (screening or not) and treatment (surgery or not), the EHR decreased to 0.97 (95% CI: 0.94–0.99), significantly lower than the unity. These results indicate that the lower stomach cancer survival among women was attributable mainly to more advanced stages among women. The survival for women would have been a little better than for men if prognostic factors for stomach cancer had been comparable between the sexes. Inequality by the gender in taking screening, medical examination or treatment for stomach cancer was suggested to exist in Osaka, Japan.

Key Words: stomach cancer • gender difference • excess hazard ratio


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.