Table 1. Selected baseline characteristics of men by level of coffee consumption, ATBC Study.
| |
Never drinkers |
0–<1 cup per day |
1–<2 cups per day |
2–<3 cups per day |
3–<4 cups per day |
⩾4 cups per day |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
No. of participants |
667 |
3094 |
7204 |
8086 |
4515 |
3471 |
||||||
| % | Median (IQR) | % | Median (IQR) | % | Median (IQR) | % | Median (IQR) | % | Median (IQR) | % | Median (IQR) | |
|
Randomisation group | ||||||||||||
| Placebo |
28.9% |
|
24.9% |
|
25.0% |
|
25.0% |
|
24.8% |
|
25.8% |
|
| AT |
23.5% |
|
25.2% |
|
24.7% |
|
25.2% |
|
25.2% |
|
25.0% |
|
| BC |
21.4% |
|
25.2% |
|
25.6% |
|
24.1% |
|
25.3% |
|
25.3% |
|
| ATBC |
26.1% |
|
24.6% |
|
24.6% |
|
25.8% |
|
24.7% |
|
23.9% |
|
| Age, years |
|
57 (53–61) |
|
57 (54–61) |
|
57 (53–62) |
|
57 (53–61) |
|
56 (52–60) |
|
55 (52–59) |
| BMI, kg m–2 |
|
25.5 (23.0–28.2) |
|
26.1 (23.7–28.6) |
|
25.9 (23.7–28.5) |
|
25.9 (23.8–28.4) |
|
26.0 (23.7–28.6) |
|
26.1 (23.8–28.5) |
| Greater than elementary school |
24.7% |
|
27.8% |
|
24.7% |
|
20.0% |
|
18.6% |
|
17.2% |
|
| Currently married |
73.3% |
|
74.7% |
|
79.7% |
|
83.5% |
|
83.9% |
|
82.6% |
|
| Age when starting to smoke, years |
|
19 (17–20) |
|
19 (17–21) |
|
19 (17–21) |
|
19 (17–21) |
|
19 (17–20) |
|
18 (16–20) |
| Years of smoking |
|
37 (31–42) |
|
37 (30–42) |
|
37 (31–42) |
|
36 (31–42) |
|
36 (31–41) |
|
36 (32–41) |
| Total no. of cigarettes per day |
|
20 (15–25) |
|
20 (12–25) |
|
20 (15–25) |
|
20 (15–25) |
|
20 (15–25) |
|
20 (20–30) |
| Alcohol (g day–1) |
|
15.92 (4.10–32.39) |
|
18.82 (6.50–36.95) |
|
12.99 (3.85–27.86) |
|
10.09 (2.19–23.83) |
|
8.77 (1.83–22.86) |
|
7.22 (1.11–19.41) |
| Non-tea drinkers |
38.8% |
|
39.6% |
|
57.1% |
|
68.4% |
|
74.5% |
|
81.6% |
|
| Serum cholesterol, mmol l–1 |
|
5.94 (5.21–6.67) |
|
6.06 (5.39–6.82) |
|
6.15 (5.41–6.91) |
|
6.20 (5.48–6.97) |
|
6.22 (5.51–7.04) |
|
6.20 (5.47–7.02) |
| History of diabetes mellitus, n, % |
5.0% |
|
5.0% |
|
4.2% |
|
3.7% |
|
4.3% |
|
4.3% |
|
| Hepatitis B surface antigen positivea |
0% |
|
0% |
|
1.8% |
|
0.5% |
|
0.8% |
|
0% |
|
| Hepatitis B core antigen positivea |
0% |
|
10.1% |
|
7.3% |
|
5.5% |
|
7.0% |
|
5.7% |
|
| Hepatitis C positivea | 0% | 1.0% | 0.9% | 0% | 0% | 0% | ||||||
Abbreviations: ATBC= Alpha-Tocopherol, Beta-Carotene Cancer Prevention; BMI=body mass index; IQR=interquartile range.
a
Available in 770 controls.