Table 2.

Factors associated with time interval from diagnostic prostate biopsy to radical prostatectomy

VariableRelative risk (95% confidence interval)P
Race
    Caucasian(Reference)
    African-American1.016 (0.998-1.035)0.09
Age at biopsy1.001 (0.999-1.002)0.23
Year of biopsy1.011 (1.008-1.014)<0.001
BMI (kg/m2)
    <25(Reference)
    25-29.90.989 (0.968-1.010)0.30
    30-34.90.996 (0.971-1.022)0.78
    ≥350.994 (0.959-1.031)0.72
PSA (log-transformed)0.998 (0.985-1.011)0.78
Clinical stage
    T1(Reference)
    T2/T31.003 (0.985-1.021)0.77
Biopsy Gleason sum
    2-6(Reference)
    71.003 (0.983-1.022)0.79
    8-100.984 (0.955-1.014)0.28
Surgical center
    VA Hospital 1(Reference)
    VA Hospital 21.048 (1.018-1.080)0.002
    VA Hospital 30.987 (0.961-1.014)0.334
    VA Hospital 40.980 (0.956-1.005)0.117
  • NOTE: Using linear regression with logarithmically transformed time interval from biopsy to surgery as the outcome variable.