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Table 1 The Clinical characteristic baseline of CCRC patients in SEER

From: 53 years old is a reasonable cut-off value to define young and old patients in clear cell renal cell carcinoma: a study based on TCGA and SEER database

Characteristic Before PSM After PSM
Younger (<=53 y) N(%) Older (> 53 y) N(%) P Younger (<=53 y) N(%) Older (> 53 y) N(%) P
Sex    < 0.001    0.613
 Male 9134 (63.98) 18,958 (59.81)   9124 (63.96) 9165 (64.24)  
 Female 5142 (36.02) 12,740 (40.19)   5142 (36.04) 5101 (35.76)  
Race    < 0.001    0.322
 Black 1020 (7.14) 1939 (6.12)   1014 (7.11) 1063 (7.45)  
 White 12,199 (85.45) 27,428 (86.53)   12,195 (85.48) 12,105 (84.85)  
 Other 1057 (7.40) 2331 (7.35)   1057 (7.41) 1098 (7.70)  
Marital    < 0.001    0.739
 Single/Other 5124 (35.89) 10,484 (33.07)   5116 (35.86) 5143 (36.05)  
 Married 9152 (64.11) 21,214 (66.93)   9150 (64.14) 9123 (63.95)  
Size    < 0.001    0.571
 Dmax<=4 cm 7058 (49.44) 12,966 (40.90)   7052 (49.43) 6981 (48.93)  
 4 cm < Dmax<=7 cm 3771 (26.41) 10,175 (32.10)   3771 (26.43) 3847 (26.97)  
 Dmax> 7 cm 3447 (24.15) 8557 (27)   3443 (24.13) 3438 (24.10)  
Grade    < 0.001    0.566
 I 2204 (15.44) 4226 (13.33)   2199 (15.41) 2243 (15.72)  
 II 7893 (55.29) 16,362 (51.62)   7890 (55.31) 7873 (55.19)  
 III 3376 (23.65) 8978 (28.32)   3375 (23.66) 3309 (23.20)  
 IV 803 (5.62) 2132 (6.73)   802 (5.62) 841 (5.90)  
Laterality    0.228    0.840
 Left 6949 (48.68) 15,622 (49.28)   6946 (48.69) 6963 (48.81)  
 Right 7327 (51.32) 16,076 (50.72)   7320 (51.31) 7303 (51.19)  
SEER historic stage A    < 0.001    0.754
 Localized 11,405 (79.89) 21,988 (69.37)   11,395 (79.88) 11,345 (79.52)  
 Regional 1865 (13.06) 6576 (20.75)   1865 (13.07) 1892 (13.26)  
 Distant 1006 (7.05) 3134 (9.89)   1006 (7.05) 1029 (7.21)  
Radiation    0.035    0.202
 NO 13,967 (97.84) 30,909 (97.51)   13,960 (97.86) 13,928 (97.63)  
 YES 309 (2.16) 789 (2.49)   306 (2.14) 338 (2.37)  
Chemotherapy    < 0.001    0.274
 NO 13,664 (95.71) 29,986 (94.60)   13,655 (95.72) 13,617 (95.45)  
 YES 612 (4.29) 1712 (5.40)   611 (4.28) 649 (4.55)