title: Population-based study of pelvic lymph node positivity in clinically localized prostate cancer: a study comparing African Americans and whites.
abstract: OBJECTIVE
  To evaluate the correlation between race and lymph node metastasis for prostate cancer by analyzing which preoperative parameters may predict lymph node status in both races.
  
  
  METHODS
  We analyzed a group of patients (552 American white men [AWM] and 423 African-American men [AAM]) who underwent radical prostatectomy plus modified pelvic lymphadenectomy between January 1991 and June 1997. Patients who received neoadjuvant radiation or hormone therapy were excluded. Univariate and multivariate analyses were performed to determine the influence of race on lymph node positivity, as well as to correlate the preoperative parameters (serum prostate-specific antigen [PSA], biopsy Gleason score, and clinical stage) with lymph node metastasis for each race separately.
  
  
  RESULTS
  The AAM presented with significantly higher preoperative Gleason scores and PSA levels than AWM. However, comparing lymph node status by race, the difference of positivity (41 AWM [7.4% and 22 AAM [5.2%]) was not statistically significant (P = 0.16). The percentage of positive nodes was similar in both races for each subset of PSA, Gleason score, and clinical stage. Despite the statistical significance of the three preoperative parameters in univariate analysis, in multivariate analysis only PSA and Gleason score were independent predictors of positive lymph nodes.
  
  
  CONCLUSIONS
  There is no influence of race on lymph node metastasis, despite AAM presenting with higher preoperative Gleason scores and PSA levels. In multivariate analysis, preoperative Gleason score and PSA were independent factors for positive nodes regardless of race.
authors.affiliation: Department of Urology, Wayne State University School of Medicine and Barbara Ann Karmanos Cancer Institute, Detroit, Michigan 48201, USA.
authors.forename: U
authors.initials: U
authors.lastname: Barroso
authors.forename: P
authors.initials: P
authors.lastname: Oskanian
authors.forename: M V
authors.initials: MV
authors.lastname: Tefilli
authors.forename: M
authors.initials: M
authors.lastname: Banerjee
authors.forename: D
authors.initials: D
authors.lastname: Grignon
authors.forename: W
authors.initials: W
authors.lastname: Sakr
authors.forename: J E
authors.initials: JE
authors.lastname: Pontes
authors.forename: I J
authors.initials: IJ
authors.lastname: Powell
mesh_terms: D044383:Black People; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D011471:Prostatic Neoplasms / Q000473:pathology*; D044465:White People; D001741:Black or African American