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Variation in percentage-free prostate-specific antigen (PSA) with prostate volume, age and total PSA level

Tornblom, M ; Norming, U ; Becker, Charlotte LU ; Lilja, Hans LU orcid and Gustafsson, O (2001) In BJU International 87(7). p.638-642
Abstract
OBJECTIVE: To examine the correlation between prostate volume, patient age and total prostate-specific antigen (tPSA) with the percentage-free PSA (f/tPSA) in a population-based cohort of men with no prostate cancer and with a tPSA of < 10.0 ng/mL. SUBJECTS AND METHODS: Men who in 1988-1989, after randomized selection in the general population, participated in a population-based screening study for prostate cancer, were investigated. In all, 1622 of the men (aged 55-70 years) were considered free from prostate cancer and had a tPSA level of < 10.0 ng/mL. The f/tPSA and tPSA were determined in frozen sera from each individual, and related to prostate volume and age measured at the time of the study. The entire population was... (More)
OBJECTIVE: To examine the correlation between prostate volume, patient age and total prostate-specific antigen (tPSA) with the percentage-free PSA (f/tPSA) in a population-based cohort of men with no prostate cancer and with a tPSA of < 10.0 ng/mL. SUBJECTS AND METHODS: Men who in 1988-1989, after randomized selection in the general population, participated in a population-based screening study for prostate cancer, were investigated. In all, 1622 of the men (aged 55-70 years) were considered free from prostate cancer and had a tPSA level of < 10.0 ng/mL. The f/tPSA and tPSA were determined in frozen sera from each individual, and related to prostate volume and age measured at the time of the study. The entire population was investigated, as were four subpopulations based on tPSA levels (< 2.0, 2.0-3.9, 4.0-6.9 and 7.0-9.9 ng/mL). Statistical calculations included multiple regression and correlation analysis. RESULTS: The f/tPSA level varied with prostate volume and age, but the decisive factor for this variation was the tPSA level. The closest correlation was in the tPSA interval 7.0-9.9 ng/mL, where volume and age together explained 47% of the variation in f/tPSA. Also, for men with tPSA levels in each of the intervals 2.0-3.9, 4.0-6.9 and 7.0-9.9 ng/mL, the f/tPSA increased with higher prostate volumes and age. In men with tPSA levels of < 2.0 ng/mL the f/tPSA was not affected by variations in prostate volume or age. CONCLUSION: The variation in f/tPSA with prostate volume, age and tPSA is highly dependent on the tPSA level. Volume and age in the tPSA interval 7.0-9.9 ng/mL can explain almost half the variation in f/tPSA, whereas this influence is insignificant in men with a tPSA of < 2.0 ng/mL. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
percentage-free PSA, PSA, prostate volume, age, variation
in
BJU International
volume
87
issue
7
pages
638 - 642
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:11350403
  • scopus:0035732079
ISSN
1464-4096
DOI
10.1046/j.1464-410x.2001.02143.x
language
English
LU publication?
yes
id
6a50aae7-c33d-4f53-abfc-12f40a783273 (old id 1122272)
date added to LUP
2016-04-01 12:03:51
date last changed
2025-04-04 15:03:02
@article{6a50aae7-c33d-4f53-abfc-12f40a783273,
  abstract     = {{OBJECTIVE: To examine the correlation between prostate volume, patient age and total prostate-specific antigen (tPSA) with the percentage-free PSA (f/tPSA) in a population-based cohort of men with no prostate cancer and with a tPSA of &lt; 10.0 ng/mL. SUBJECTS AND METHODS: Men who in 1988-1989, after randomized selection in the general population, participated in a population-based screening study for prostate cancer, were investigated. In all, 1622 of the men (aged 55-70 years) were considered free from prostate cancer and had a tPSA level of &lt; 10.0 ng/mL. The f/tPSA and tPSA were determined in frozen sera from each individual, and related to prostate volume and age measured at the time of the study. The entire population was investigated, as were four subpopulations based on tPSA levels (&lt; 2.0, 2.0-3.9, 4.0-6.9 and 7.0-9.9 ng/mL). Statistical calculations included multiple regression and correlation analysis. RESULTS: The f/tPSA level varied with prostate volume and age, but the decisive factor for this variation was the tPSA level. The closest correlation was in the tPSA interval 7.0-9.9 ng/mL, where volume and age together explained 47% of the variation in f/tPSA. Also, for men with tPSA levels in each of the intervals 2.0-3.9, 4.0-6.9 and 7.0-9.9 ng/mL, the f/tPSA increased with higher prostate volumes and age. In men with tPSA levels of &lt; 2.0 ng/mL the f/tPSA was not affected by variations in prostate volume or age. CONCLUSION: The variation in f/tPSA with prostate volume, age and tPSA is highly dependent on the tPSA level. Volume and age in the tPSA interval 7.0-9.9 ng/mL can explain almost half the variation in f/tPSA, whereas this influence is insignificant in men with a tPSA of &lt; 2.0 ng/mL.}},
  author       = {{Tornblom, M and Norming, U and Becker, Charlotte and Lilja, Hans and Gustafsson, O}},
  issn         = {{1464-4096}},
  keywords     = {{percentage-free PSA; PSA; prostate volume; age; variation}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{638--642}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{BJU International}},
  title        = {{Variation in percentage-free prostate-specific antigen (PSA) with prostate volume, age and total PSA level}},
  url          = {{http://dx.doi.org/10.1046/j.1464-410x.2001.02143.x}},
  doi          = {{10.1046/j.1464-410x.2001.02143.x}},
  volume       = {{87}},
  year         = {{2001}},
}