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Table 2 Clinical characteristics and colonoscopy findings of the study cohort (N = 5,137)

From: Evaluation of a clinical risk index for advanced colorectal neoplasia among a North American population of screening age

  All (N = 5,137) Women (n = 2,821) Men (n = 2,316)
Age group in years, n (%)    
50–54 1,764 (34.3) 1,016 (36.0) 748 (32.3)
55–59 1,404 (27.3) 731 (25.9) 673 (29.1)
60–66 1,330 (25.9) 734 (26.0) 596 (25.7)
>66 639 (12.4) 340 (12.0) 299 (12.9)
Family History of CRC, n (%)    
None 4,648 (90.5) 2,526 (89.5) 2,122 (91.6)
1 first-degree relative ≥ 60 years old 381 (7.4) 222 (7.9) 159 (6.9)
1 first-degree relative < 60 years old 83 (1.6) 55 (2.0) 28 (1.2)
2 first-degree relatives 25 (0.5) 18 (0.6) 7 (0.3)
Smoking history in pack-years, n (%)   
None 2,849 (55.5) 1,617 (57.3) 1,232 (53.2)
<10 1,342 (26.1) 779 (27.6) 563 (24.3)
10–19 419 (8.2) 204 (7.2) 215 (9.3)
≥20 527 (10.3) 221 (7.8) 306 (13.2)
BMI in kg/m2, n (%)    
<25 1,772 (34.5) 1,226 (43.5) 546 (23.6)
25-29 2,149 (41.8) 984 (34.9) 1,165 (50.3)
≥30 1,216 (23.7) 611 (21.7) 605 (26.1)
Most advanced finding at colonoscopy, n (%)
None 3,232 (62.9) 1,943 (68.9) 1,289 (55.7)
Hyperplastic polyp 561 (10.9) 305 (10.8) 256 (11.0)
Non-advanced neoplasia 993 (19.3) 427 (15.1) 566 (24.4)
Advanced neoplasia 351 (6.8) 146 (5.2) 205 (8.9)
  1. BMI body mass index