Table 2.
Baseline (2010) Sociodemographic Characteristics of the Analytical Sample Before the 2011 Earthquake and Mortality During the 6-Year Follow-up Period (2011–2017) According to Preexposure Residential Distance From the Coast, Iwanuma, Japan
| Distance From Coast | ||||||||
|---|---|---|---|---|---|---|---|---|
| Characteristic | Total | >3,000 m | 1,000–3,000 m | <1,000 m | ||||
| No. | % | No. | % | No. | % | No. | % | |
| No. of participants | 4,857 | 100.0 | 4,129 | 100.0 | 467 | 100.0 | 261 | 100.0 |
| No. of deaths during follow-up period | 806 | 16.7 | 650 | 15.7 | 95 | 20.3 | 61 | 23.4 |
| Sex | ||||||||
| Male | 2,105 | 43.3 | 1,817 | 44.0 | 190 | 40.7 | 98 | 37.5 |
| Female | 2,752 | 56.7 | 2,312 | 55.0 | 277 | 59.3 | 163 | 62.5 |
| Depression in 2010a | ||||||||
| Mild or severe depression | 1,444 | 29.7 | 1,222 | 29.6 | 133 | 28.5 | 89 | 34.1 |
| No depression | 2,682 | 55.2 | 2,302 | 55.8 | 253 | 54.2 | 127 | 48.7 |
| Missing data | 731 | 15.1 | 605 | 14.7 | 81 | 17.3 | 45 | 17.2 |
| Self-rated health in 2010 | ||||||||
| Very good | 538 | 11.1 | 445 | 10.8 | 57 | 12.2 | 36 | 13.8 |
| Good | 3,140 | 64.6 | 2,710 | 65.6 | 286 | 61.2 | 144 | 55.2 |
| Bad | 862 | 17.7 | 724 | 17.5 | 85 | 18.2 | 53 | 20.3 |
| Very bad | 227 | 4.7 | 180 | 4.4 | 26 | 5.6 | 21 | 8.0 |
| Missing data | 90 | 1.9 | 70 | 1.7 | 13 | 2.8 | 7 | 2.7 |
| Duration of education in 2010, years | ||||||||
| <6 | 123 | 2.5 | 95 | 2.3 | 13 | 2.8 | 15 | 5.7 |
| 6–9 | 1,634 | 33.6 | 1,260 | 30.5 | 240 | 51.4 | 134 | 51.3 |
| 10–12 | 1,938 | 39.9 | 1,767 | 42.8 | 122 | 26.1 | 49 | 18.8 |
| ≥13 | 916 | 18.9 | 846 | 20.5 | 54 | 11.6 | 16 | 6.1 |
| Other | 52 | 1.1 | 32 | 0.8 | 11 | 2.4 | 9 | 3.4 |
| Missing data | 194 | 4.0 | 129 | 3.1 | 27 | 5.8 | 38 | 14.6 |
| Current smoking status in 2010 | ||||||||
| Nonsmoker | 3,938 | 81.1 | 3,386 | 82.0 | 347 | 74.3 | 205 | 78.5 |
| Smoker | 496 | 10.2 | 410 | 9.9 | 63 | 13.5 | 23 | 8.8 |
| Missing data | 423 | 8.7 | 333 | 8.1 | 57 | 12.2 | 33 | 12.6 |
| Current alcohol drinking status in 2010 | ||||||||
| Drinker | 1,624 | 33.4 | 1,431 | 34.7 | 132 | 28.3 | 61 | 23.4 |
| Nondrinker | 3,114 | 64.1 | 2,611 | 63.2 | 316 | 67.7 | 187 | 71.6 |
| Missing data | 119 | 2.5 | 87 | 2.1 | 19 | 4.1 | 13 | 5.0 |
| Current treatment for hypertension in 2010 | ||||||||
| No | 2,729 | 56.2 | 2,326 | 56.3 | 252 | 54.0 | 151 | 57.9 |
| Yes | 2,001 | 41.2 | 1,710 | 41.4 | 194 | 41.5 | 97 | 37.2 |
| Missing data | 127 | 2.6 | 93 | 2.3 | 21 | 4.5 | 13 | 5.0 |
| Current treatment for stroke in 2010 | ||||||||
| No | 4,594 | 94.6 | 3,929 | 95.2 | 429 | 91.9 | 236 | 90.4 |
| Yes | 136 | 2.8 | 107 | 2.6 | 17 | 3.6 | 12 | 4.6 |
| Missing data | 127 | 2.6 | 93 | 2.3 | 21 | 4.5 | 13 | 5.0 |
| Current treatment for diabetes in 2010 | ||||||||
| No | 4,064 | 83.7 | 3,461 | 83.8 | 388 | 83.1 | 215 | 82.4 |
| Yes | 666 | 13.7 | 575 | 13.9 | 58 | 12.4 | 33 | 12.6 |
| Missing data | 127 | 2.6 | 93 | 2.3 | 21 | 4.5 | 13 | 5.0 |
| Current treatment for dyslipidemia in 2010 | ||||||||
| No | 4,274 | 88.0 | 3,638 | 88.1 | 399 | 85.4 | 237 | 90.8 |
| Yes | 456 | 9.4 | 398 | 9.6 | 47 | 10.1 | 11 | 4.2 |
| Missing data | 127 | 2.6 | 93 | 2.3 | 21 | 4.5 | 13 | 5.0 |
| Age in 2010, yearsb | 74.7 (6.97) | 74.6 (6.79) | 74.5 (7.38) | 77.1 (8.40) | ||||
| Equivalized household income in 2010 (10,000 yen)b,c | 228 (147) | 234 (148) | 202 (140) | 170 (126) | ||||
| Missing data | 977 | 20.1 | 791 | 19.2 | 103 | 22.1 | 83 | 31.8 |
a Depression was defined as scoring 5 or more points on the Geriatric Depression Scale.
b Values are expressed as mean (standard deviation).
c Household income was divided by the square root of household size.