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Table 1 Features and symptoms/signs of incident cases of colorectal cancer, according with tumor’s location

From: Effect of diagnostic delay on survival in patients with colorectal cancer: a retrospective cohort study

  Total N = 942 Colon N = 650 Rectum N = 292  
Mean ± SD Median Mean ± SD Median Mean ± SD Median P
Age, years 68.0 ± 11.4 69 68.0 ± 11.5 69 68.1 ± 11.0 68 0.922
  N %      
Gender        0.236
 Male 502 53.3 % 338 52.0 % 164 56.2 %  
 Female 440 46.7 % 312 48.0 % 128 43.8 %  
Stage        <0.001
 I 113 13.2 % 60 10.0 % 53 20.9 %  
 II 300 35.0 % 226 37.5 % 74 29.1 %  
 III 271 31.7 % 194 32.2 % 77 30.3 %  
 IV 172 20.1 % 122 20.3 % 50 19.7 %  
 Unknown 86 - 48 - 38 -  
Symptoms/signs before diagnosisa
 Rectal bleeding 560 59.4 % 306 47.1 % 254 87.0 % <0.001
 Change in bowel habits 489 51.9 % 321 49.5 % 168 57.5 % 0.022
 Abdominal pain 454 48.2 % 393 60.6 % 61 20.9 % <0.001
 Constitutional syndrome 454 48.2 %      
 Rectal tenesmus 163 17.3 % 59 9.1 % 104 35.6 % <0.001
 Anemia 126 13.4 % 107 16.5 % 19 6.5 % <0.001
 Bowel obstruction 124 13.2 % 115 17.7 % 9 3.1 % <0.001
 Abdominal mass 57 6.1 % 51 7.9 % 6 2.1 % 0.001
 Mucorrhage 48 5.1 % 30 4.6 % 18 6.2 % 0.320
 Rectal pain 38 4.0 % 7 1.1 % 31 10.6 % <0.001
 Bowel perforation 29 3.1 % 26 4.0 % 3 1.0 % 0.014
 Intra-abdominal abscess 16 1.7 % 14 2.2 % 2 0.7 % 0.106
 Rectovaginal fistula 4 0.4 % 3 0.5 % 1 0.3 % 0.999
 Hematuria 3 0.3 % 3 0.5 % 0 0 % 0.556
 Fecal urgency 2 0.2 % 1 0.3 % 1 0.2 % 0.525
 Fecal incontinence 2 0.2 % 1 0.3 % 1 0.2 % 0.525
 Anal fistula 2 0.2 % 1 0.3 % 1 0.2 % 0.525
 Fecaluria 1 0.1 % 1 0.2 % 0 0 % 0.999
  1. SD Standard Deviation
  2. aMore than one symptom or sign could be registered before diagnosis for the same patient