Table 1.
Demographic characteristics of the three samples
| Characteristics | Nyukawa study | Noshiro study | Field study |
|---|---|---|---|
| Observation period | 2004-present | 1998-present | 1990s |
| Number of participants | 984 | 2,443 | 881 |
| Men:women | 425:559 | 1,229:1,214 | 188:693 |
| Age (years) | 56.1 ± 15.1 | 49.9 ± 14.0 | 50.8 ± 10.4 |
| Body mass index (BMI) | 22.3 ± 2.9 | 23.3 ± 3.1 | 23.2 ± 3.0 |
| SBP (mmHg) | 125.2 ± 19.2 | 126.6 ± 18.2 | 129.1 ± 13.8 |
| DBP (mmHg) | 72.7 ± 12.1 | 77.5 ± 11.9 | 76.6 ± 10.3 |
| % Taking antihypertensive or diuretics | 10.9 | 15.8 | 10.8 |
| % Hypertension | 15.5 | 17.6 | 12.8 |
Data are shown as values or mean ± standard deviation (SD)