Table 1.
Baseline Characteristics of Study Participants
| Total (N = 259,081) |
Disaster affected (n = 2,762, 1.1%) |
Non-Affected (n = 256,319, 98.9%) |
P value | |
|---|---|---|---|---|
| Individual-associated factors | ||||
| Age, categorical (%) | <0.001† | |||
| <65 | 4,493 (1.7) | 58 (2.1) | 4,435 (1.7) | |
| 65-69 | 9,403 (3.6) | 99 (3.6) | 9,304 (3.6) | |
| 70-74 | 15,987 (6.2) | 187 (6.8) | 15,797 (6.2) | |
| 75-79 | 28,407 (11.0) | 333 (12.1) | 28,074 (11.0) | |
| 80-84 | 53,672 (20.7) | 576 (20.9) | 53,096 (20.7) | |
| 85-90 | 72,126 (27.8) | 793 (28.7) | 71,333 (27.8) | |
| 90-94 | 52,476 (20.3) | 510 (18.5) | 51,966 (20.3) | |
| >95 | 22,520 (8.7) | 206 (7.5) | 22,314 (8.7) | |
| Men, n (%) | 73,555 (28.4) | 842 (30.5) | 72,713 (28.4) | 0.01* |
| Level of care needs (%) | <0.001† | |||
| Support level 1 | 20,456 (7.9) | 265 (9.6) | 20,191 (7.9) | |
| Support level 2 | 27,030 (10.4) | 370 (13.4) | 26,660 (10.4) | |
| Care need level 1 | 58,622 (22.6) | 659 (23.9) | 57,963 (22.6) | |
| Care need level 2 | 51,328 (19.8) | 532 (19.3) | 50,796 (19.8) | |
| Care need level 3 | 39,788 (15.4) | 360 (13.0) | 39,428 (15.4) | |
| Care need level 4 | 34,406 (13.3) | 316 (11.4) | 34,090 (13.3) | |
| Care need level 5 | 27,451 (10.6) | 260 (9.4) | 27,191 (10.6) | |
| Facility-associated factors (%) | ||||
| Closure of facility in use | 3,857 (1.5) | 416 (15.1) | 3,441 (1.3) | <0.001* |
| Type of LTC services in use | ||||
| Home visit service | 81,443 (31.4) | 797 (28.8) | 80,646 (31.5) | 0.005* |
| Day care | 139,073 (53.7) | 1,527 (55.3) | 137,546 (53.7) | 0.055* |
| Short term stay | 70,386 (27.2) | 917 (33.2) | 69,469 (27.1) | <0.001* |
| Nursing facilities | 104,332 (40.3) | 1,035 (37.5) | 103,297 (40.3) | 0.004* |
| Multifunctional facility | 9,124 (3.5) | 71 (2.6) | 9,053 (3.5) | 0.006* |
| Care manager service | 39,991 (15.4) | 290 (10.5) | 39,701 (15.5) | <0.001* |
| Region-associated factors | ||||
| Population density (SD) | 2,017 (1,901) | 1,510 (1,399) | 2,023 (1,905) | <0.001‡ |
| Hospital beds per population (SD) | 1.5 (0.6) | 1.6 (0.7) | 1.5 (0.6) | 0.009‡ |
| No. of nursing facilities per 10,000 elderly | 23 (1.1) | 25 (1.1) | 23 (1.1) | <0.001‡ |
| Average income (every 1,000 yen) (SD) | 2,971 (276) | 2,916 (277) | 2,972 (276) | <0.001‡ |
| Proportion of the elderly (%) | <0.001† | |||
| Low 19.8-25.0 | 97,601 (37.7) | 599 (21.7) | 97,002 (37.8) | |
| Middle 25.5-30.7 | 77,937 (30.1) | 1,102 (39.9) | 76,835 (30.0) | |
| High 31.2-49.1 | 85,543 (33.0) | 1,061 (38.4) | 83,543 (33.4) | |
Individual- and facility-associated factors were extracted from the Long-term care insurance comprehensive database, and region-associated factors were extracted from the National Census Database. LTC long-term care, SD standard deviation, No., number; * chi-squared test, † Wilcoxon rank-sum test, ‡ two samples t-test