Table 1.
Baseline characteristicsa of study participants in the Polyp Prevention Studies (n = 2,663)
| Characteristic | Antioxidant Polyp Pre- vention Study (n=747) |
Calcium Polyp Prevention Study (n=832) |
Aspirin/Folate Polyp Prevention Study (n=1,084) |
|---|---|---|---|
| Median age, yr | 62 (56, 66) | 62 (55, 67) | 57 (51,64) |
| Female sex, n (%) | 588 (78.7) | 598 (71.9) | 690 (63.7) |
| Race, n (%) | |||
| White | 638 (85.4) | 710 (85.3) | 928 (85.6) |
| Black | 52 (7.0) | 65 (7.8) | 63 (5.8) |
| Other | 57 (7.6) | 57 (6.9) | 93 (8.6) |
| Highest educational level, n (%) | |||
| <12 years | 153 (20.5) | 164 (19.7) | 107 (9.9) |
| ≥12 years | 594 (79.5) | 667 (80.3) | 977 (90.1) |
| Smoking status, n (%) | |||
| Never | 240 (32.8) | 288 (34.6) | 462 (42.7) |
| Former | 352 (48.1) | 398 (47.8) | 462 (42.7) |
| Current | 140(19.1) | 146(17.6) | 157(14.5) |
| Median alcohol intake, drinks/day | 0.2 (0, 1.0) | 0.1 (0, 0.8) | 0.1 (0, 0.9) |
| BMI (kg/m2), n (%) | |||
| <25.0 | 233 (31.4) | 258 (31.1) | 333 (30.8) |
| 25.0–29.9 | 363 (48.9) | 366 (44.1) | 507 (46.9) |
| ≥30.0 | 147 (19.7) | 206 (24.8) | 242 (22.3) |
| DM diagnosis, n (%) | 43 (5.8) | 77 (9.3) | 65 (6.0) |
| Cancer diagnosis, n (%) | 72 (9.6) | 68 (8.2) | 71 (6.6) |
| CRC family history n (%) | 150 (20.5) | 191 (23.9) | 332 (37.3) |
| Median total fat intake, g/day | 79.1 (56.4, 107.6) | 80.2 (55.1, 109.3) | 58.7 (39.9, 80.9) |
| Median red meat intake, servings/day | 0.5 (0.2, 0.7) | 0.4 (0.2, 0.7) | 0.3 (0.1, 0.5) |
| Median fiber intake, g/day | 12.7 (9.6, 17.8) | 15.0 (11.3, 20.3) | 12.1 (8.9, 16.7) |
a
Data are expressed as median (percentiles 25 and 75) and percentages.