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Poor Survival for US Pacific Islander Cancer Patients: Evidence From the Surveillance, Epidemiology, and End Results Database: 1991 to 2004

William B. Goggins, Grace K.C. Wong

From the School of Public Health; and the Nethersole School of Nursing, Chinese University of Hong Kong, Shatin, Hong Kong, China

Address reprint requests to William Goggins, ScD, School of Public Health, Room 501, Chinese University of Hong Kong, Shatin, Hong Kong, China; e-mail: wgoggins{at}cuhk.edu.hk

Purpose Although racial and ethnic differences in cancer survival in the United States have been studied extensively, little is known about cancer survival in US Pacific Islanders (PIs), a fast-growing and economically disadvantaged minority group.

Methods Using data from the US National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) registries, we compared cause-specific and all-cause survival for female breast, prostate, lung, colorectal, stomach and liver cancer for Native Hawaiians, Samoans, other PIs (including Tongans, Guamanians, and others), African Americans, and Native Americans with non-Hispanic whites using Cox proportional hazards models. Separate models were fitted adjusting for demographic factors only and demographic and disease severity variables.

Results Among all groups, Samoans were the most likely to present with advanced disease and had the worst cause-specific survival for all sites considered. Samoans had particularly poor results (adjusted for demographic variables only) for female breast (relative risk [RR] = 3.05; 95% CI, 2.31 to 4.02), colorectal (RR = 1.82; 95% CI, 1.37 to 2.41) and prostate (RR = 4.82; 95% CI, 3.38 to 6.88) cancers. Native Hawaiians and other PIs also had significantly worse cause-specific survival than did non-Hispanic whites for most sites, but generally had better survival than African Americans or Native Americans.

Conclusion Much of the survival disadvantage for PI groups appears to be a result of late diagnosis, and thus targeted interventions have much potential to reduce cancer mortality in this group. More research is needed to find explanations for the particularly poor cancer survival for Samoans in the United States.

Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article.

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