| Mean age at interview,y (±SD) |
61.46 |
6.75 |
61.67 |
6.88 |
0.550 |
| Mean Smoking years,y (±SD) |
14.6 |
16.77 |
18.52 |
17.86 |
<0.001 |
| Mean smoking packyears, (±SD) |
16.61 |
31.51 |
21.04 |
31.51 |
0.008 |
| Mean alcohol intake, y (±SD) |
8.03 |
14.76 |
9.44 |
18.54 |
0.108 |
| Mean dietary folate, mcg/day (±SD) |
366.63 |
210.28 |
340.08 |
194.28 |
0.013 |
| Mean Calories (±SD) |
2046.25 |
951.76 |
2081 |
924.43 |
0.473 |
| Mean dietary fiber, g/day (±SD) |
22.84 |
13.18 |
21.43 |
12.67 |
0.036 |
| Mean saturated fat, g/day (±SD) |
23.37 |
13.38 |
24.4 |
13.42 |
0.147 |
| Mean BMI (±SD) |
27.08 |
4.79 |
27.57 |
4.61 |
0.051 |
| Median Age at interview,y |
|
|
|
|
|
| ≤60 yrs |
331 |
44.97 |
313 |
43.41 |
0.549 |
| >60 yrs |
405 |
55.03 |
408 |
56.59 |
|
| Race/ethnicity |
|
|
|
|
|
| non-Hispanic White |
386 |
52.59 |
372 |
52.10 |
0.344 |
| African-American |
112 |
15.26 |
126 |
17.65 |
|
| Hispanic |
149 |
20.30 |
123 |
17.23 |
|
| Asian-Pacific Islander |
79 |
10.76 |
80 |
11.20 |
|
| Other |
8 |
1.09 |
13 |
1.82 |
|
| Sex |
|
|
|
|
|
| Male |
479 |
65.17 |
465 |
64.49 |
0.787 |
| Female |
256 |
34.83 |
256 |
35.51 |
|
| Clinic of diagnosis |
|
|
|
|
|
| Bellflower |
472 |
64.13 |
464 |
64.36 |
0.929 |
| Sunset |
264 |
35.87 |
257 |
35.64 |
|
| Study Phase |
|
|
|
|
|
| Phase I |
460 |
62.50 |
438 |
60.75 |
0.492 |
| Phase II |
276 |
37.50 |
283 |
39.25 |
|
| Number of Adenomas |
|
|
|
|
|
| 1 |
|
|
638 |
88.73 |
|
| ≥2 |
|
|
81 |
11.27 |
|
| Missing |
|
|
2 |
|
|
| Adenoma site |
|
|
|
|
|
| Rectum (<15 cm) |
|
|
137 |
19.13 |
|
| Colon (≥15 cm) |
|
|
579 |
80.87 |
|
| Missing |
|
|
5 |
|
|
| Adenoma size |
|
|
|
|
|
| Small (<1 cm) |
|
|
476 |
66.85 |
|
| Large (≥1 cm) |
|
|
236 |
33.15 |
|
| Missing |
|
|
9 |
|
|
| Smoking |
|
|
|
|
|
| Never |
301 |
42.94 |
253 |
36.77 |
<0.001 |
| Former |
326 |
46.50 |
312 |
45.35 |
|
| Current |
74 |
10.56 |
123 |
17.88 |
|
| Missing |
35 |
|
33 |
|
|
| Smoking years |
|
|
|
|
|
| Never |
301 |
43.43 |
253 |
37.21 |
<0.001 |
| >0–26 yrs |
198 |
28.57 |
168 |
24.71 |
|
| >26 yrs |
194 |
27.99 |
259 |
38.09 |
|
| Missing |
43 |
|
41 |
|
|
| Smoking Pack-years |
|
|
|
|
|
| Never |
301 |
43.56 |
253 |
37.26 |
0.001 |
| >0–21 |
196 |
28.36 |
171 |
25.18 |
|
| >21 |
194 |
28.08 |
255 |
37.56 |
|
| Alcohol intake |
|
|
|
|
|
| Never |
283 |
38.45 |
268 |
37.33 |
0.323 |
| ≤6 g/day |
227 |
30.84 |
204 |
27.41 |
|
| >6 g/day |
226 |
30.71 |
246 |
34.26 |
|
| Missing |
0 |
|
3 |
|
|
| Alcohol intake |
|
|
|
|
|
| Never |
283 |
38.45 |
268 |
37.33 |
0.864 |
| ≤15 g/day |
333 |
45.24 |
327 |
45.54 |
|
| >15 g/day−30 g/day |
50 |
6.79 |
46 |
6.41 |
|
| >30 g/day |
70 |
9.51 |
77 |
10.72 |
|
| Missing |
0 |
|
3 |
|
|
| Alcohol intake |
|
|
|
|
|
| Never |
283 |
38.45 |
268 |
37.33 |
0.871 |
| ≤15 g/day |
333 |
45.24 |
327 |
45.54 |
|
| >15 g/day |
120 |
16.30 |
123 |
17.13 |
|
| Missing |
0 |
|
3 |
|
|
| Dietary folate |
|
|
|
|
|
| Low (≤267 mcg/day) |
248 |
33.70 |
283 |
40.60 |
0.024 |
| Medium (>267–387 mcg/day) |
241 |
32.74 |
210 |
30.13 |
|
| High (≥388 mcg/day) |
247 |
33.56 |
204 |
29.27 |
|
| Missing |
|
|
|
|
|
| Multivitamin use |
|
|
|
|
|
| No |
303 |
41.28 |
293 |
42.40 |
0.668 |
| Yes |
431 |
58.72 |
398 |
57.60 |
|
| Missing |
2 |
|
30 |
|
|
