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Scott A. Hundahl, MD; Grant N. Stemmermann, MD; Andrew Oishi, MD

Arch Surg. 1996;131(2):170-175.

Abstract
Objective
To compare the stage-stratified survival of Japanese patients treated in Honolulu according to Western techniques with that of Japanese patients treated in Tokyo according to Japanese techniques, thus eliminating race as a potentially confounding variable.

Design and Patients
Of 312 Honolulu Japanese patients surviving Western-type gastric resection for neoplasm between 1974 and 1985, 279 were identified with invasive gastric adenocarcinoma unassociated with any second malignancy. This Honolulu cohort, treated by Western methods, was retrospectively compared with a similar, previously described cohort of 3176 Tokyo Japanese patients treated according to Japanese methods.

Main Outcome Measures
American Joint Committee on Cancer/Union Internationale Contre le Cancer criteria for stage-stratified survival.

Results
Despite non-TNM prognostic factors favoring higher survival for the Honolulu Japanese patients, for every TNM stage, we observed higher survival for the Tokyo Japanese patients who were treated according to Japanese techniques. For stage I disease, the survival rates were 86% vs 96%, respectively (P<.001); for stage II, 69% vs 77% (P=.15); for stage III, 21% vs 49% (P<.001); and for stage IV, 4% vs 14% (P<.001).

Conclusions
Because all patients in this study are Japanese, race-related factors or the "different-disease" hypothesis cannot explain these results. Lymphadenectomyrelated stage-migration and/or differing therapeutic efficacy seem more likely explanations.

(Arch Surg. 1996;131:170-175)

Author Affiliations
From the Queen's Medical Center and the Cancer Research Center of Hawaii, Honolulu (Dr Hundahl), University of Cincinnati, Cincinnati, Ohio, and Kuakini Medical Center, Honolulu (Dr Stemmermann), and the Mayo Clinic, Rochester, Minn (Dr Oishi).

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