Characteristics of the total populations from which the study subcohort samples were obtained (data from the 2000 Population Census of Japan12)
| Adogawa | Shin-asahi | Takashima | Makino | |
|---|---|---|---|---|
| *Adogawa 7 missing records, Makino 1 missing record. | ||||
| †Agriculture, fishing, forestry etc. | ||||
| ‡Manual labour. | ||||
| ¶Service industry. | ||||
| §NHI, Japanese National Health Insurance programme. This health insurance system is compulsory for everyone living in Japan and is divided into two categories. One is for employees and their dependents (Employees’ Health Insurance Programme); the other is for farmers, self-employed people, pensioners, and their dependents (National Health Insurance Programme), which covers about 35% of the population. | ||||
| Population | ||||
| Total | 14 489 | 11 068 | 7 138 | 6 210 |
| Men (%) | 7 080 (48⋅9) | 5 397 (48⋅8) | 3 377 (47⋅3) | 2 982 (48⋅0) |
| Women (%) | 7 409 (51⋅1) | 5 671 (51⋅2) | 3 761 (52⋅7) | 3 228 (52⋅0) |
| Population density (per hectare) | ||||
| No. people | 2⋅98 | 3⋅37 | 0⋅79 | 1⋅12 |
| No. people per dwellable area | 5⋅23 | 5⋅75 | 4⋅11 | 3⋅18 |
| Households | ||||
| Total number | 4 413 | 3 310 | 2 032 | 1 873 |
| Mean no. family members per household | 3·28 | 3·34 | 3·51 | 3·31 |
| Age (years)* | ||||
| ⩽14 (%) | 2 337 (16⋅1) | 1 897 (17⋅1) | 1 076 (15⋅1) | 916 (14⋅8) |
| 15–64 (%) | 8 965 (61⋅9) | 6 979 (63⋅1) | 4 353 (61⋅0) | 3 729 (60⋅0) |
| ⩾65 (%) | 3 180 (21⋅9) | 2 192 (19⋅8) | 1 709 (23⋅9) | 1 564 (25⋅1) |
| Industrial population | ||||
| Primary† (%) | 556 (7⋅6) | 254 (4⋅5) | 261 (7⋅6) | 253 (8⋅1) |
| Secondary‡ (%) | 2 876 (39⋅5) | 2 700 (47⋅1) | 1 214 (35⋅2) | 1 380 (44⋅4) |
| Tertiary¶ (%) | 3 857 (52⋅9) | 2 775 (48⋅4) | 1 969 (57⋅2) | 1 472 (47⋅4) |
| Total | 7 289 | 5 729 | 3 444 | 3 105 |
| NHI membership§ | ||||
| % total population | 38⋅69 | 36⋅37 | 35⋅81 | 37⋅57 |