Table 5.
Characteristics of study completers and non-completers given as means and SD or number and percent.
| Characteristic | Completer n = 93 |
Non-completer n=27 |
|---|---|---|
| Age, yearsa | 54, 11 (range 24–82) | 48, 14 (range 22–71) |
| Female gender | 67, 72% | 19, 70% |
| BMI, kg/m2 | 27, 4 (range 19–35) | 28, 3 (range 22–35) |
| Regular aspirin user | 20, 21% | 4, 15% |
| Caucasian race | 83, 89% | 22, 81% |
| Married/committed | 63, 68% | 13, 48% |
| College graduate | 73, 78% | 19 70%, |
| Tobacco user | 10, 11% | 7, 26% |
| History of adenomas | 27, 29% | 6, 22% |
| Family history of colon cancer | 58, 62% | 19, 70% |
| Both risk factors | 8, 9% | 2, 7% |
| Vegetable intake, servings/daya | 2.99, 1.25 | 2.44, 1.25 |
a
The differences between completers and non-completers were significant using the two-sample t-test for age at study entry (p=0.04) and dietary intake of vegetables (p=0.05). The other dietary variables listed in Table 4 were evaluated as well and none of these differed significantly by study completion status.