| Marital status | ||||
| Married | 21.78 | 3.77 | *** | |
| Single | 20.49 | 3.88 | ||
| Child status | ||||
| Have a child | 21.81 | 3.77 | *** | |
| Do not have a child | 20.58 | 3.87 | ||
| Living with persons requiring care | ||||
| Yes | 21.42 | 3.86 | ||
| No | 21.13 | 3.88 | ||
| Education | ||||
| Community college or vocational school | 21.24 | 3.86 | ||
| University graduate or higher | 20.81 | 3.98 | ||
| Employment status | ||||
| Permanent | 21.11 | 3.86 | * | |
| Temporary | 22.14 | 3.85 | ||
| Position | ||||
| Managerial position | 20.94 | 3.87 | *** | |
| Staff nurse | 23.04 | 3.38 | ||
| Scholarship system | ||||
| Used | 21.27 | 4.09 | ||
| Not used | 21.09 | 3.68 | ||
| Hospital location | ||||
| Kanto district | 21.68 | 4.08 | *** | |
| Tohoku district | 20.86 | 3.71 | ||
| Number of overtime hours per month | ||||
| <5 | 21.30 | 3.58 | ||
| 5 - 20 | 21.06 | 3.80 | ||
| ≥20 | 21.29 | 4.13 | ||
| Number of beds at hospital | ||||
| <500a | 21.16 | 3.93 | a-c* | |
| 500 - 700b | 21.00 | 3.85 | b-c** | |
| ≥700c | 22.22 | 3.76 | ||
| Number of nursing staff members at hospital | ||||
| <500 | 21.36 | 3.70 | ||
| 500 - 700 | 20.84 | 3.91 | ||
| ≥700 | 21.40 | 3.92 | ||