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Table 1 Participant characteristics by polyp status, Kaiser Permanente Washington, Seattle, Washington, 1998-2007

From: Telomere length differences between colorectal polyp subtypes: a colonoscopy-based case-control study

Patient characteristics   Controls Adenomas Serrated polyps Both Adenomas + Serrated polyps
   (n = 49) (n = 80) (n = 33) (n = 28)
Age in years; Mean (SD)   59.7 (10.8) 62.3 (10.4) 61.7 (9.2) 62.3 (10.9)
Gender; n(%) Male 25 (51) 44 (55) 13 (39.4) 13 (46.4)
  Female 24 (49) 36 (45) 20 (60.6) 15 (53.6)
White race; n(%)   44 (89.8) 72 (90) 29 (87.8) 25 (89.3)
Smoking; n(%) Never 20 (40.8) 27 (33.8) 9 (27.3) 9 (32.1)
  Former 22 (44.9) 50 (62.5) 20 (60.6) 14 (50)
  Current 7 (14.3) 3 (3.8) 4 (12.1) 5 (17.9)
Alcohol use; n(%)   31 (63.3) 44 (55) 22 (66.7) 18 (64.3)
BMI; n(%) < 25 17 (34.7) 25 (31.3) 10 (30.3) 8 (28.6)
  25–29.99 19 (38.8) 37 (46.3) 10 (30.3) 9 (32.1)
  30+ 13 (26.5) 17 (21.4) 13 (39.4) 11 (39.3)
Education; n(%) <High school 8 (16.3) 11 (13.8) 4 (12.1) 3 (10.7)
  Some college 11 (22.5) 21 (26.3) 9 (27.3) 12 (42.9)
  College + 30 (61.2) 48 (60) 20 (60.6) 13 (46.4)
Anti-inflammatory drug use; n(%)   26 (53.1) 41 (51.3) 17 (51.5) 10 (35.7)
Physical activity ≥60 MET h/wk.; n(%)   41 (83.7) 62 (77.5) 26 (78.8) 23 (82.1)
Relative Telomere length; Median (IQR)   0.60 (0.56–0.72) 0.60 (0.50–0.71) 0.57 (0.45–0.67) 0.59 (0.51–0.67)
Short telomeres; n(%) T/S < 0.58 or shortest tertilea 17 (34.7) 36 (45.6) 19 (57.8) 14 (50)
  1. BMI Body Mass Index, MET Metabolic Equivalent of Task
  2. aTelomere tertiles were based on the telomere length distribution among controls only