Results of the questionnaire comparing members of group 1 and group 2, eight years after screening
| Group | ||||
|---|---|---|---|---|
| 1 | 2 | Ratio B/A | p Value | |
| Values are number (%) or mean (SD). | ||||
| *For food and beverages, average number of servings per day is compared. | ||||
| n | 2538 | 1010 | ||
| Offered questionnaire | 240 | 240 | ||
| Returned questionnaire | 188 (78%) | 130 (54%) | 0.7 | 0.001 |
| Age (y) (mean (SD)) | 63.1 (10.6) | 61.6 (10.3) | NS | |
| Cancer in the family | 93 (49%) | 26 (20%) | 0.4 | 0.045 |
| Colonic investigation | 106 (56.4%) | 42 (32.3%) | 0.6 | 0.001 |
| Smokers | 29 (15%) | 48 (37%) | 2.5 | 0.004 |
| Coffee* (mean (SD)) | 2.3 (2.0) | 13.5 (2.4) | 5.9 | 0.001 |
| Fried food (mean (SD)) | 1.6 (1.4) | 1.9 (1.3) | 1.2 | 0.052 |
| Red meat (mean (SD)) | 1.2 (1.4) | 1.4 (1.4) | 1.2 | 0.181 |
| Dairy food (mean (SD)) | 4.0 (2.0) | 3.5 (1.9) | 0.9 | 0.013 |
| Tea (mean (SD)) | 1.9 (1.9) | 1.4 (2.4) | 0.7 | 0.040 |
| Fibre (mean (SD)) | 0.5 (1.2) | 0.3 (1.0) | 0.6 | 0.087 |