Table 1 Baseline characteristics of individuals according to green tea consumption, the Ohsaki study
From: Green tea consumption and lung cancer risk: the Ohsaki study
Green tea consumption, cups/day | ||||
|---|---|---|---|---|
<1 | 1 or 2 | 3 or 4 | ⩾5 | |
Characteristics | (n =10950) | (n =8983) | (n =9024) | (n =12 483) |
Age in years, mean (s.d.) | 58.0 (10.8) | 58.7 (10.8) | 60.7 (10.0) | 61.9 (9.5) |
Sex, no. (%) | ||||
Men | 5959 (54.4) | 4447 (49.5) | 3998 (44.3) | 5185 (41.5) |
Women | 4991 (45.6) | 4536 (50.5) | 5026 (55.7) | 7298 (58.5) |
Smoking status, no. (%) | ||||
Never | 4634 (49.2) | 4085 (53.4) | 4459 (57.8) | 5965 (56.7)a |
Former | 1521 (16.1) | 1116 (14.6) | 1161 (15.0) | 1551 (14.7) |
Current, <20 cigarettes/day | 1190 (12.6) | 869 (11.4) | 803 (10.4) | 1226 (11.7) |
Current, ⩾20 cigarettes/day | 2080 (22.1) | 1578 (20.6) | 1296 (16.8) | 1786 (17.0) |
Passive smoking, no. (%) | ||||
Yes | 4190 (48.9) | 3306 (49.0) | 2942 (45.9) | 4241 (49.5) |
No | 4378 (51.1) | 3444 (51.0) | 3467 (54.1) | 4323 (50.5) |
Alcohol drinking, no. (%) | ||||
Never | 3910 (40.2) | 3371 (42.6) | 3749 (47.1) | 5297 (48.7) |
Former | 838 (8.6) | 576 (7.3) | 560 (7.0) | 844 (7.8) |
Current, <45.6 g day−1 ethanol | 2996 (30.8) | 2506 (31.6) | 2355 (29.6) | 3151 (29.0) |
Current, ⩾45.6 g day−1 ethanol | 1984 (20.4) | 1470 (18.6) | 1301 (16.3) | 1592 (14.6) |
Education level, no. (%) | ||||
Junior high school or lower | 6306 (61.0) | 4783 (55.8) | 4855 (56.1) | 7145 (59.7) |
High school | 3298 (31.9) | 3055 (35.6) | 3027 (35.0) | 3841 (32.1) |
College/university or higher | 739 (7.1) | 733 (8.6) | 768 (8.9) | 980 (8.2) |
Walking duration, h day −1 , no. (%) | ||||
<1 | 5277 (52.9) | 4507 (54.3) | 4761 (57.2) | 6377 (55.7) |
⩾1 | 4706 (47.1) | 3794 (45.7) | 3556 (42.8) | 5076 (44.3) |
Body mass index, no. (%) b | ||||
<18.5 | 348 (3.4) | 255 (3.0) | 259 (3.0) | 368 (3.1) |
18.5–24.9 | 6914 (67.7) | 5807 (68.4) | 5884 (68.7) | 7918 (66.9) |
⩾25 | 2950 (28.9) | 2430 (28.6) | 2421 (28.3) | 3558 (30.0) |
Marital status, no. (%) | ||||
Married | 8027 (81.7) | 6788 (82.8) | 6831 (82.2) | 9235 (80.6) |
Widowed/divorced | 1276 (13.0) | 1063 (13.0) | 1206 (14.5) | 1899 (16.6) |
Single | 525 (5.3) | 350 (4.3) | 275 (3.3) | 319 (2.8) |
Family history of cancer, no. (%) | ||||
Yes | 3139 (28.7) | 2667 (29.7) | 2949 (32.7) | 4230 (33.9) |
No | 7811 (71.3) | 6316 (70.3) | 6075 (67.3) | 8253 (66.1) |
Total energy intake, mean (s.d.), kcal day−1 | 1507 (594) | 1516 (569) | 1524 (544) | 1554 (542) |
Daily dietary consumption | ||||
Soybean products, mean (s.d.), g | 44.7 (26.8) | 48.5 (25.9) | 50.9 (24.7) | 53.5 (24.1) |
Total meat, mean (s.d.), g | 17.8 (16.0) | 18.1 (15.2) | 17.8 (14.2) | 17.6 (14.9) |
Total fish, mean (s.d.), g | 53.7 (34.6) | 56.1 (33.9) | 59.2 (32.6) | 63.4 (33.2) |
Dairy products, mean (s.d.), g | 130.0 (101.1) | 139.9 (100.7) | 145.7 (100.3) | 147.1 (101.3) |
Total fruits, mean (s.d.), g | 78.9 (61.2) | 90.6 (62.8) | 101.0 (63.1) | 111.6 (63.9) |
Total vegetables, mean (s.d.), g | 84.6 (54.7) | 94.9 (55.6) | 102.1 (54.8) | 108.6 (57.1) |
Coffee, ⩾3 cups, no. (%) | 1338 (13.5) | 862 (11.3) | 695 (9.2) | 897 (8.8) |
