title: Can a baseline prostate specific antigen level identify men who will have lower urinary tract symptoms later in life?
abstract: OBJECTIVE
  We evaluated the relationship between baseline prostate specific antigen (PSA) and subsequent lower urinary tract symptom development during 3 decades in unselected men in the Baltimore Longitudinal Study of Aging.
  
  
  METHODS
  Urinary questionnaires were used to evaluate lower urinary tract symptoms in 704 men during 3 decades. The number of repeat evaluations was 1 to 18. We divided subjects into age groups of younger than 50 and 50 to 69.9 years at the time of the first PSA evaluation. Subjects were divided into 3 PSA groups based on initial PSA below the 25th, 25th to 75th and above the 75th percentile. A mixed effects Poisson model was used to test whether there was a significant relationship between PSA grouping and symptom score with time.
  
  
  RESULTS
  There was no statistically significant difference in symptom score distribution across PSA percentiles in men younger than 50 years (p = 0.87) or 50 to 69.9 years old (p = 0.59). When age was used as an independent variable in the model, there was no statistically significant relationship between baseline PSA and symptom score (p = 0.38).
  
  
  CONCLUSIONS
  These data suggest that PSA is not a useful predictor of the development of lower urinary tract symptoms in unselected, asymptomatic men.
authors.affiliation: Department of Urology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. hcarter@jhmi.edu
authors.forename: H Ballentine
authors.initials: HB
authors.lastname: Carter
authors.forename: Patricia
authors.initials: P
authors.lastname: Landis
authors.forename: E James
authors.initials: EJ
authors.lastname: Wright
authors.forename: J Kellogg
authors.initials: JK
authors.lastname: Parsons
authors.forename: E Jeffrey
authors.initials: EJ
authors.lastname: Metter
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015142:Baltimore; D014408:Biomarkers, Tumor / Q000097:blood*; D015331:Cohort Studies; D018450:Disease Progression; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D017430:Prostate-Specific Antigen / Q000097:blood*; D011470:Prostatic Hyperplasia / Q000097:blood* / Q000175:diagnosis / Q000517:prevention & control; D012306:Risk; D011795:Surveys and Questionnaires; D001748:Urinary Bladder Neck Obstruction / Q000097:blood* / Q000175:diagnosis
chemical_list: D014408:Biomarkers, Tumor; D017430:Prostate-Specific Antigen