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. 2019 Aug;31(4):686–698. doi: 10.21147/j.issn.1000-9604.2019.04.12

1.

Characteristics of study population

Group PUCH [n (%)] PUSH [n (%)]
CRC Control CRC Control
PUCH, Peking University Cancer Hospital; PUSH, Peking University Shougang Hospital; CRC, colorectal cancer.
Total 4,211 77,099 436 56,799
Age (year)
 <45 444 (10.5) 42,531 (55.2) 17 (3.9) 36,928 (65.0)
 45−54 810 (19.2) 16,893 (21.9) 65 (14.9) 15,131 (26.6)
 55−64 1,297 (30.8) 9,559 (12.4) 129 (29.6) 3,751 (6.6)
 65−74 1,031 (24.5) 5,402 (7.0) 96 (22.0) 488 (0.9)
 ≥75 629 (14.9) 2,714 (3.5) 129 (29.6) 501 (0.9)
  Inline graphic 60.6±12.5 43.9±14.6 66.4±12.8 39.0±11.8
Gender
 Male 2,470 (58.7) 39,127 (50.7) 252 (57.8) 41,594 (73.2)
 Female 1,741 (41.3) 37,972 (49.3) 184 (42.2) 15,205 (26.8)
Tumor stage
 I 252 (6.0) 37 (8.5)
 II 595 (14.1) 78 (17.9)
 III 633 (15.0) 93 (21.3)
 IV 147 (3.5) 31 (7.1)
 Unspecified 2,584 (61.4) 197 (45.2)
Tumor location
 Colon 2,279 (54.1) 179 (41.1)
 Rectum 1,932 (45.9) 257 (58.9)