Table 2 Baseline characteristics of patients with advanced prostate cancer in the original/matched data sets (N = 19,772)

From: Effect of prior cancer on survival outcomes for patients with advanced prostate cancer

  Original data set Matched data set
Characteristics No prior cancer
N = 18,885 (%)
With prior cancer
N = 887 (%)
P value No prior cancer
N = 887 (%)
With prior cancer
N = 887 (%)
P value
Age (years), mean (SD) 69.3 (11.5) 75.6 (10.3) < 0.001 75.8 (10.7) 75.6 (10.3) 0.661
Year of diagnose(%)    0.001    0.393
 2004–2007 10,185 (53.9) 430 (48.5)   448 (50.5) 430 (48.5)  
 2008–2010 8700 (46.1) 457 (51.5)   439 (49.5) 457 (51.5)  
Race    0.025    0.088
 White 3442 (18.2) 85 (9.6)   101 (11.4) 85 (9.6)  
 Black 14,231 (75.4) 751 (84.7)   717 (80.8) 751 (84.7)  
 Others/Unknown 1212 (6.4) 51 (5.7)   69 (7.8) 51 (5.7)  
Marital status    < 0.001    0.174
 Single 2636 (14.0) 73 (8.2)   94 (10.6) 73 (8.2)  
 Married 11,292 (59.8) 584 (65.8)   543 (61.2) 584 (65.8)  
 Others status a 3742 (19.8) 182 (20.5)   198 (22.3) 182 (20.5)  
 Unknown 1215 (6.4) 48 (5.4)   52 (5.9) 48 (5.4)  
Grade    < 0.001    0.608
 Grade I 1209 (6.4) 79 (8.9)   70 (7.9) 79 (8.9)  
 Grade II 13,411 (71.0) 555 (62.6)   573 (64.6) 555 (62.6)  
 Grade III 4265 (22.6) 253 (28.5)   244 (27.5) 253 (28.5)  
Surgery    0.304    0.159
 No/unknown 13,951 (73.9) 669 (75.4)   694 (78.2) 669 (75.4)  
 Yes 4934 (26.1) 218 (24.6)   193 (21.8) 218 (24.6)  
Chemotherapy    0.468    0.413
 No/unknown 17,843 (94.5) 833 (93.9)   835 (94.1) 833 (93.9)  
 Yes 1042 (5.5) 54 (6.1)   52 (5.9) 54 (6.1)  
Radiotherapy    0.013    0.639
 No/unknown 14,191 (75.1) 699 (78.8)   707 (79.7) 699 (78.8)  
 Yes 4694 (24.9) 188 (21.2)   180 (20.3) 188 (21.2)  
  1. aOther status including divorced, widowed, separated or domestic partner