Association between glomerular filtration rate, free, total, and percent free prostate-specific antigen

Autor: Djenaba A. Joseph, David M. Werny, Trevor D. Thompson, Mona Saraiya
Rok vydání: 2009
Předmět:
Zdroj: Urology. 76(5)
ISSN: 1527-9995
Popis: To determine the relationship between glomerular filtration rate (GFR) and free prostate-specific antigen (fPSA), percent-free PSA (%fPSA), and total PSA (tPSA) in patients with diminished kidney function not on dialysis, using nationally representative data.A total of 3782 men aged ≥ 40 years who participated in the National Health and Nutrition Examination Survey 2001-2006, and who met eligibility criteria for PSA testing were included in the final study population. GFR (mL/min/1.73 m(2)) was calculated using the Modification of Diet in Renal Disease equation 7 and categorized as ≥ 90, 60 to90, and 15 to60. Distribution of tPSA, fPSA, and %fPSA were estimated by GFR category and by age and race. Multivariate linear regression models were fit to determine the adjusted relationship between GFR and tPSA and %fPSA after adjusting for age, race, and body mass index.The multivariate linear regression analysis showed that GFR had a linear relationship with tPSA that was of borderline significance. There was a significant nonlinear relationship between GFR and %fPSA (P.001): increased GFR was associated with a decrease in %fPSA for GFR levels below 90 [eg, change in %fPSA = -2.67 (95% CI -3.56, -1.77) for a GFR of 85 as compared with 65; P.001]. The decline in %fPSA with increasing GFR was nonsignificant for GFR levels above 90.Our finding that renal function as measured by GFR is negatively associated with %fPSA has potential implications for use of this test in men with renal disease.
Databáze: OpenAIRE
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