| Survey Items | Minimum | Maximum | Mean | ± | SD | |
| PSQI: Pittsburgh Sleep Quality Index (points) | 0.00 | 16.00 | 6.17 | ± | 3.57 | |
| PSQI ≥ 6 vs. <6 | 80 vs. 81 | |||||
| PCS: Physical Component Summary (points) | 17.83 | 61.76 | 46.56 | ± | 8.65 | |
| PCS ≥ 50 vs. <50 | 71 vs. 90 | |||||
| MCS: Mental Component Summary (points) | 31.89 | 66.66 | 52.63 | ± | 6.07 | |
| MCS ≥ 50 vs. <50 | 117 vs. 44 | |||||
| Age (years)* | 57.00 | 90.00 | 76.16 | ± | 7.75 | |
| n | % | |||||
| 55-64 | 15 | 9.3 | ||||
| 65-74 | 53 | 32.9 | ||||
| 75-84 | 65 | 40.4 | ||||
| 85-90 | 28 | 17.4 | ||||
| Gender | Male | 74 | 46.0 | |||
| Female | 87 | 54.0 | ||||
| Job Type (n = 49) | Office worker | 1 | 2.0 | |||
| Agriculture | 12 | 24.5 | ||||
| Fishery | 16 | 32.7 | ||||
| Self-employed business | 1 | 2.0 | ||||
| Public employees | 2 | 4.1 | ||||
| Others | 17 | 34.7 | ||||