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Table 1 Patient and clinical characteristics by mode of colorectal cancer diagnosis (n = 9626)

From: Factors associated with mode of colorectal cancer detection and time to diagnosis: a population level study

  Urgent Screen-detected Symptomatic p-valuea
(n = 2428) (n = 3083) (n = 4115)  
n (%) n (%) n (%)  
Patient characteristics
 Age at diagnosis
  < 50 228 (9) 211 (7) 383 (9) 0.0429
  50–59 461 (19) 519 (17) 757 (18)  
  60–69 586 (19) 792 (26) 1015 (25)  
  70–79 599 (25) 1011 (33) 1230 (30)  
   ≥ 80 554 (23) 550 (18) 730 (18)  
 Residential zonesb
  Calgary 804 (33) 1084 (35) 1226 (30) <.0001
  Central 334 (14) 357 (12) 741 (18)  
  Edmonton 836 (34) 1088 (35) 1320 (32)  
  North 274 (11) 292 (9) 463 (11)  
  South 180 (7) 262 (9) 364 (9)  
 Median annual household income
   < $45389 647 (27) 705 (23) 993 (24) 0.4062
   $45389 - $59119 590 (24) 681 (22) 1074 (26)  
   $59119 - $80148 595 (25) 789 (26) 964 (23)  
   ≥ $80148 547 (23) 837 (27) 962 (23)  
   Missing 49 (2) 71 (2) 122 (3)  
Clinical characteristics
 Anatomic site
  Colon 1672 (69) 1943 (63) 2471 (60) <.0001
  Rectum 756 (31) 1140 (37) 1644 (40)  
 Stage at diagnosis
  I 280 (12) 781 (25) 886 (22) <.0001
  II 670 (28) 831 (27) 1150 (28)  
  III 701 (29) 879 (29) 1191 (29)  
  IV 777 (32) 592 (19) 888 (22)  
 Charlson comorbidity score
  0 1359 (56) 1985 (64) 2528 (61) 0.0025
  1 601 (25) 675 (22) 893 (22)  
  ≥ 2 468 (19) 423 (14) 694 (17)  
 Gastrointestinal comorbidities
  Yes 544 (22) 827 (27) 1062 (26) 0.0005
  No 1884 (78) 2256 (73) 3053 (74)  
  1. aJonckheere-Terpstra trend test for ordinal variables (age, income, comorbidity score and stage at diagnosis) and Chi-square test for the other categorical variables were used to compare proportions. bOne patient with unknown residential zone was excluded from this calculation