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Table 1 Characteristics of patients, and polyp findings in each age group

From: Findings in young adults at colonoscopy from a hospital service database audit

   All % Age <50 % Age ≥50 % P-value <50 vs ≥50
Totals   n = 2064   n = 485   n = 1579   
Mean age   59.7   39.2   66.0   
Median age   60   42   65   
Age range   18–96   18–49   50–96   
Sex Males 984 47.6 220 45.4 764 48.4 0.13
Females 1080 52.4 265 54.6 815 51.6  
Indications         
  IBD 90 4.4 49 10.1 41 2.6 <0.001
  Overt bleeding 348 16.8 108 22.2 240 15.2 <0.001
  Occult bleeding 350 16.9 29 5.9 321 20.3 <0.001
  Pain 227 11 77 15.9 150 9.5 <0.001
  Bowel habit 194 9.4 74 15.3 120 7.6 <0.001
  FH CRC 117 5.7 42 8.7 75 4.8 0.001
  PH CRC 83 4 4 0.8 79 5 <0.001
  PH polyps 303 14.9 34 7 274 17.4 <0.001
Findings         
  Any polyps 714 34.6 80 16.5 584 37 <0.001
  Serrated polyps 205 9.9 41 8.5 164 10.4 0.21
  Conventional adenomas 523 25.3 46 9.5 477 30.2 <0.001
  Multiple polyps 406 19.7 35 7.2 371 23.5 <0.001
  CPL 225 10.9 21 4.3 204 12.9 <0.001
Polyp sub-types         
  SSA/P 65 3.1 11 2.3 54 3.4 0.20
  TSA 1 0.01 0 0 1 0.06  
  TVA 95 4.6 8 1.6 87 5.5 <0.001
  ATA 76 3.7 3 0.6 73 4.6 <0.001
  VA 2 0.01 0 0 2 0.13  
Cancers
  CRC 55 2.7 5 1 50 3.2 0.01
  Distal CRC Site 28 49.1 4 80 24 48.1 0.35
  1. IBD Inflammatory bowel disease (Crohns disease, ulcerative colitis, NOS), FH CRC Family history of CRC, PH CRC Personal history of CRC, PH Polyps Personal history of polyps, CPL known CRC precursor lesions, SSA/P Sessile serrated adenoma/polyps, TVA Tubulovillous adenoma, ATA Advanced tubular adenoma (≥10 mm, and/or high-grade dysplasia), TSA Traditional serrated adenoma, VA Villous adenoma
  2. Significant p-values are shown in italics