Table 1.
Characteristics of the study participants
| Hokkaido | Tohoku | Kanto-Koshinetsu | Tokai-Hokuriku | Kinki | Chugoku-Shikoku | Kyushu | Okinawa | P | |
|---|---|---|---|---|---|---|---|---|---|
| N | 480 | 829 | 4959 | 1544 | 2110 | 1042 | 1165 | 118 | – |
| Female, % | 51.7 | 46.9 | 45.1 | 46.9 | 47.6 | 47.2 | 50.0 | 45.8 | 0.03 |
| Age, year (mean ± SD) | 51.6 ± 13.2 | 50.7 ± 12.8 | 49.6 ± 13.0 | 50.4 ± 13.0 | 50.5 ± 13.5 | 51.1 ± 13.3 | 50.7 ± 13.4 | 48.9 ± 12.3 | < 0.001 |
| BMI, kg/m2 (mean ± SD) | 23.3 ± 3.6 | 23.3 ± 3.9 | 23.1 ± 3.8 | 22.9 ± 3.6 | 22.9 ± 3.6 | 23.1 ± 3.7 | 23.1 ± 3.7 | 23.9 ± 4.0 | 0.001 |
| Fish intake frequency, per week (mean ± SD) | 2.3 ± 2.0 | 2.4 ± 1.9 | 2.1 ± 1.9 | 2.2 ± 1.9 | 2.1 ± 1.7 | 2.1 ± 1.8 | 2.0 ± 1.8 | 1.9 ± 1.6 | 0.003 |
| Current alcohol drinkers, % | 60.1 | 63.7 | 64.3 | 56.2 | 60.7 | 58.3 | 60.5 | 70.3 | < 0.001 |
| Current alcohol consumption, g/day (mean ± SD)* | 12.5 ± 14.5 | 11.8 ± 13.3 | 12.2 ± 14.3 | 10.5 ± 12.1 | 10.6 ± 12.2 | 10.4 ± 11.7 | 11.9 ± 14.1 | 14.0 ± 16.3 | < 0.001 |
| Inflation factor | 1.015 | 0.999 | 0.993 | 1.020 | 1.005 | 1.018 | 1.001 | 1.009 | – |
BMI body mass index, SD standard deviation
P values were calculated using χ2 test for sex and current alcohol drinkers or ANOVA for other variables
*Among current drinkers