Table 1.
Baseline characteristics of participants in the PPT-based cohort by adenoma recurrence
| Characteristic |
Overall |
No recurrence |
Advanced recurrence* |
Any recurrence† |
||
|---|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Mean (SD) | P | Mean (SD) | P | |
| Sample size | 1,905 | 1,151 | 125 | 125/1,151 | 754 | 754/11,51 |
| Age, y | 61.1 (9.9) | 59.9 (10.1) | 65.2 (9.2) | <0.0001 | 62.8 (9.2) | <0.0001 |
| Body mass index (kg/m2) | 27.6 (3.9) | 27.4 (4.0) | 28.0 (4.1) | 0.10 | 27.8 (3.9) | 0.05 |
| Gender (% male) | 64 | 60 | 70 | 0.02 | 72 | <0.0001 |
| Race (% Caucasian) | 90 | 90 | 90 | 0.99 | 90 | 0.97 |
| Education (% ≤high school) | 25 | 24 | 28 | 0.35 | 26 | 0.49 |
| NSAID use (% yes) | 34 | 35 | 24 | 0.01 | 31 | 0.11 |
| Aspirin use (% yes) | 23 | 23 | 19 | 0.28 | 22 | 0.55 |
| Multivitamin use (% yes) | 34 | 35 | 31 | 0.34 | 32 | 0.18 |
| Vitamin A use (% yes) | 33 | 35 | 30 | 0.24 | 31 | 0.10 |
| Vitamin E use (% yes) | 41 | 42 | 38 | 0.43 | 40 | 0.45 |
| Energy intake (MJ/d) | 8.05 (2.44) | 7.97 (2.36) | 7.93 (2.65) | 0.86 | 8.16 (2.55) | 0.11 |
| Fruit intake (g/d) | 156 (122) | 152 (115) | 166 (126) | 0.19 | 162 (127) | 0.07 |
| Vegetable intake (g/d) | 270 (132) | 268 (125) | 256 (108) | 0.25 | 273 (120) | 0.43 |
| Family history of CRC (% yes) | 27 | 27 | 26 | 0.96 | 27 | 0.77 |
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.