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- Author
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IMAI, Kyoichi, YAMANAKA, Hidetoshi, KUBOTA, Yutaka, MIKI, Makoto, ITO, Takaaki, AKAZA, Hideyuki, UCHIDA, Katsunori, EGAWA, Shin, KURIYAMA, Manabu, WATANABE, Hiroki, OKIHARA, Koji, KOTAKE, Toshihiko, USAMI, Michiyuki, ARAI, Yoichi, MAEDA, Hiroshi, SAGIYAMA, Kazuyuki, SAITO, Yutaka, SAKAI, Hideki, SHIDA, Keizo, IMAI, Kyoichi, YAMANAKA, Hidetoshi, KUBOTA, Yutaka, MIKI, Makoto, ITO, Takaaki, AKAZA, Hideyuki, UCHIDA, Katsunori, EGAWA, Shin, KURIYAMA, Manabu, WATANABE, Hiroki, OKIHARA, Koji, KOTAKE, Toshihiko, USAMI, Michiyuki, ARAI, Yoichi, MAEDA, Hiroshi, SAGIYAMA, Kazuyuki, SAITO, Yutaka, SAKAI, Hideki, and SHIDA, Keizo
- Abstract
We studied the clinical significance of serum prostate specific antigen (PSA) ratio: free-PSA/total-PSA and free-PSA/complex-PSA to discriminate between prostate cancer (PC) and prostate benign disease (non-PCa) by using total-PSA, alpha 1-antichymotrypsin complexed (complex)-PSA and free-PSA enzyme-linked immunosorbent assay (ELISA) kits newly developed at EIKEN Chemical Co, Ltd. Fre-PSA and complex-PSA ELISA kits demonstrated high sensitivity and specificity. Total-PSA ELISA kit also demonstrated equimolarity for free-PSA and complex-PSA. On the total-PSA range of 4-10 ng/ml, free-PSA/total-PSA% (f/t%) and free-PSA/complex-PSA% (f/c%) were very useful to discriminate between PCa and non-PCa by receiver operating characteristic curve analysis as well as PSA density (PSA-D) but not free-PSA level. F/t% and f/c% were even useful to discriminate early stage PCa (i.e. A1 or B0) from non-PCa by the Mann-Whitney U-test.
- Published
- 1998