Table 1 Demographic characteristics and lifestyle factors in men and women controls (n=697)
From: Dietary isoflavone and the risk of colorectal adenoma: a case–control study in Japan
Quartiles of energy-adjusted intake of total isoflavones (mg per day) | |||||
|---|---|---|---|---|---|
Lowest | Second | Third | Highest | ||
(<24.77) | (24.77 to <39.73) | (39.73 to <62.41) | (⩾62.41) | ||
(n =174) | (n =175) | (n =174) | (n =174) | P- value a | |
Sex | |||||
Men, n (%) | 141 (81.0) | 120 (68.6) | 105 (60.3) | 94 (54.0) | <0.01 |
Women, n (%) | 33 (19.0) | 55 (31.4) | 69 (39.7) | 80 (46.0) | |
Age, mean (years) | 59.2 (5.6) | 59.1 (6.5) | 60.7 (5.6) | 60.4 (5.9) | 0.02 |
Supplement use, yes (%) | 71 (40.8) | 72 (41.1) | 89 (51.2) | 91 (52.3) | 0.04 |
Family history of colorectal cancer, n (%) | 21 (12.1) | 21 (12.0) | 29 (16.7) | 15 (8.6) | 0.15 |
Non-steroidal anti-inflammatory drug use, n (%) | 19 (10.9) | 8 (4.6) | 8 (4.6) | 17 (9.8) | 0.04 |
Ever smoker, n (%) | 105 (60.3) | 92 (52.6) | 74 (42.5) | 67 (38.5) | <0.01 |
Mean cigarettes (pack-years) | 31.0 (27.8) | 26.4 (24.5) | 27.2 (21.6) | 22.4 (21.0) | 0.16 |
Ever drinker, n (%) | 138 (79.3) | 133 (76.0) | 127 (73.0) | 128 (73.6) | 0.51 |
Mean alcohol (g per week ethanol) | 218.4 (226.2) | 201.0 (197.3) | 158.1 (177.9) | 140.0 (156.8) | <0.01 |
Body mass index, mean (kg m−2) | 23.1 (2.6) | 22.8 (3.0) | 23.1 (2.7) | 23.1 (3.0) | 0.79 |
Physical activity, mean (MET h per day) | 35.7 (6.8) | 35.6 (7.0) | 36.7 (7.1) | 37.6 (9.2) | 0.06 |
Total energy intake, mean (kcal per day) | 1774.4 | 1900.0 | 1906.2 | 1839.1 | 0.11 |
Total isoflavone intake, mean (mg per day)b | 17.3 | 31.4 | 49.4 | 78.5 | <0.01 |
Age at menarche, mean (years) | 13.4 (1.7) | 13.1 (1.2) | 13.2 (1.5) | 13.3 (1.4) | 0.72 |
Postmenopausal status, n (%) | 31 (93.9) | 47 (85.5) | 64 (92.8) | 70 (87.5) | 0.43 |
Postmenopausal hormone use, n (%) | 3 (9.1) | 10 (18.2) | 8 (11.6) | 8 (10.0) | 0.47 |
