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Prostate Cancer Prognostic Factors Among Asian Patients Born in the US Compared to Those Born Abroad

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Abstract

US surveillance data indicate that incidence of prostate cancer differs by place of birth among Asian men. However, it is less clear if the prognostic factors for prostate cancer also differ by place of birth. The study included 7,824 Asian prostate cancer patients diagnosed between 2004 and 2009 and reported to the Surveillance Epidemiology and End Results (SEER) program. Logistic regression models were used to evaluate the relation of place of birth (foreign born vs. US born) to three outcomes: prostate specific antigen (PSA) level, Gleason score, and T classification, adjusting for age, marital status, Rural–Urban Continuum Code, and SEER registry. All outcome variables were binary using different cutoffs: ≥4, ≥10 and ≥20 ng/ml for PSA; ≥7 and ≥8 for Gleason score; and ≥T2 and ≥T3 for T classification. Elevated PSA was more common among foreign born Asian men regardless of the cut point used. In the analysis comparing foreign born versus US born patients by ethnic group, the association with PSA was most pronounced at cut point of ≥20 ng/ml for Chinese men (OR 1.68, 95 % CI 1.02–2.75), and at cut point of ≥4 ng/ml for Japanese men (OR 2.73, 95 % CI 1.20–6.21). A statistically significant association with Gleason score was only found for Japanese men and only for the cutoff ≥7 (OR 1.71, 95 % CI 1.12–2.61). There was no difference in clinical T classification between foreign-born and US-born Asian men. Inclusion of cases with missing place of birth or restriction of data to those who underwent radical prostatectomy did not substantially change the results. The data suggest that foreign-born Asian prostate cancer patients may have moderately elevated PSA levels at diagnosis compared with their US born counterparts. For the other prognostic markers, the associations were less consistent and did not form a discernible pattern.

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Authors and Affiliations

  1. Department of Epidemiology, Rollins School of Public Health, Emory University, 1518 Clifton Road, NE, Atlanta, GA, 30322, USA

    Junjun Xu, Michael Goodman & Stacey A. Fedewa

  2. Surveillance and Health Services Research, American Cancer Society, Atlanta, GA, USA

    Ahemdin Jemal

Authors
  1. Junjun Xu
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  2. Michael Goodman
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  3. Ahemdin Jemal
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  4. Stacey A. Fedewa
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Correspondence to Stacey A. Fedewa.

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Xu, J., Goodman, M., Jemal, A. et al. Prostate Cancer Prognostic Factors Among Asian Patients Born in the US Compared to Those Born Abroad. J Immigrant Minority Health 17, 625–631 (2015). https://doi.org/10.1007/s10903-014-0023-x

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  • DOI: https://doi.org/10.1007/s10903-014-0023-x

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