Table 1.

Baseline demographics by trial participation status

CharacteristicaAll registered (n = 142)Ineligible or withdrawn (n = 57)Intervention cohort (n = 85)Pb
Age, y0.49
 Median585958
 Range41–7841–7641–78
Gender, n (%)0.22
 Women55 (38.7)26 (45.6)29 (34.1)
 Men87 (61.3)31 (54.4)56 (65.9)
BMI, kg/m20.81
 Median28.328.228.3
 Range15.5–51.322.5–47.715.5–51.3
Cigarette smoking status, n (%)0.82
 Never56 (42.4)21 (44.7)35 (41.2)
 Current18 (13.6)5 (10.6)13 (15.3)
 Former58 (43.9)21 (44.7)37 (43.5)
Alcohol, drinks per day, n (%)0.85
 None50 (37.9)17 (36.2)33 (38.8)
 <169 (52.3)24 (51.1)45 (52.9)
 2–310 (7.6)5 (10.6)5 (5.9)
 ≥43 (2.3)1 (2.1)2 (2.4)
Family history of CRC, n (%)c0.12
 Yes27 (20.4)6 (12.8)21 (24.7)
 No105 (79.6)41 (87.2)64 (75.3)
  • aData for 1 or more characteristics were missing for n = 10 ineligible/withdrawn subjects.

  • bP value for comparison between ineligible or withdrawn subjects versus intervention cohort subjects using Fisher's exact test for categorical responses and rank-sum test for continuous responses.

  • cDefined as 1 or more first-degree, biological (nonadopted) relative(s) with colorectal cancer.