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Table 1 Descriptive characteristics of 14,185 locally advanced prostate cancer patients undergoing radical prostatectomy between 2010 and 2016 from the Surveillance Epidemiology and End Results database. Primary 14,185 patients were randomly divided into 2 cohorts: training cohort and validation cohort

From: Development and validation of a preoperative nomogram for predicting survival of patients with locally advanced prostate cancer after radical prostatectomy

VariablePrimary Cohort (n = 14,185)Training Cohort (n = 9932)Validation Cohort (n = 4253)P-value
Number%Number%Number%
Age      0.131
 < 505143.63563.61583.7 
 50–59409228.9290729.3118527.9 
 60–69746052.6516352.0229754.0 
 > 69211914.9150615.261314.4 
Race      0.658
 White11,44580.7803380.9341280.2 
 Black185213.0128212.957013.4 
 Othera8886.36176.22716.4 
Marital Status      0.501
 Married10,42973.5728973.4314073.8 
 Singleb300121.2210021.190121.2 
 Unknown7555.35435.52125.0 
T stage      0.019
 T1–22902.01851.91052.5 
 T3–413,89598.0974798.1414897.5 
N stage      0.077
 N012,21586.1858686.4362985.3 
 N1197013.9134613.662414.7 
PSA level (ng/ml)      0.012
 ≤ 10944766.6668267.3276565.0 
 10–20304321.5206620.897723.0 
 > 20169511.9118411.951112.0 
GS biopsy      0.402
 ≤ 6214215.1151015.263214.9 
 7 (3 + 4)457132.2323432.6133731.4 
 7 (4 + 3)301521.3208020.993522.0 
 8243617.2168417.075217.7 
 ≥ 9202114.2142414.359714.0 
% positive core biopsy      0.638
 00–25%298621.1208821.089821.1 
 25–50%498235.1351535.4146734.5 
 50–75%300821.2208121.092721.8 
 75–100%320922.6224822.696122.6 
AJCC staging system      0.140
 IIIB10,82076.3759176.4322975.9 
 IIIC13959.899510.04009.4 
 IVA197013.9134613.662414.7 
  1. Abbreviation: AJCC American Joint Committee on Cancer
  2. aOther: American Indian/AK Native, Asian/Pacific Islander
  3. bSingle: Divorced, Separated, Single (never married), Widowed, unmarried