Table 1.

Baseline characteristics of participants in the PPT-based cohort by adenoma recurrence

No recurrence
Advanced recurrence*
Any recurrence
Mean (SD)Mean (SD)Mean (SD)PMean (SD)P
Sample size1,9051,151125125/1,151754754/11,51
Age, y61.1 (9.9)59.9 (10.1)65.2 (9.2)<0.000162.8 (9.2)<0.0001
Body mass index (kg/m2)27.6 (3.9)27.4 (4.0)28.0 (4.1)0.1027.8 (3.9)0.05
Gender (% male)6460700.0272<0.0001
Race (% Caucasian)9090900.99900.97
Education (% ≤high school)2524280.35260.49
NSAID use (% yes)3435240.01310.11
Aspirin use (% yes)2323190.28220.55
Multivitamin use (% yes)3435310.34320.18
Vitamin A use (% yes)3335300.24310.10
Vitamin E use (% yes)4142380.43400.45
Energy intake (MJ/d)8.05 (2.44)7.97 (2.36)7.93 (2.65)0.868.16 (2.55)0.11
Fruit intake (g/d)156 (122)152 (115)166 (126)0.19162 (127)0.07
Vegetable intake (g/d)270 (132)268 (125)256 (108)0.25273 (120)0.43
Family history of CRC (% yes)2727260.96270.77
  • NOTE: Results are presented as means (SD) for continuous variables and % for categorical variables with P values for differences in means determined by t tests and differences in proportions determined by χ2 tests. Adenomatous polyp recurrence and advanced adenoma recurrence were diagnosed using full colonoscopy at the end of year 4.

  • * Comparison between the advanced adenoma recurrence group to the no adenoma recurrence group.

  • Comparison between the any adenoma recurrence group to the no adenoma recurrence group.