| Items | Cases (n = 399) | % | Breakdown | Cases (n = 399) | % |
| Tumble | 171 | 42.9 | Hypoactivity | 32 | 8.0 |
| Imperfection of surroundings | 29 | 7.3 | |||
| Lack of observation (visual power, activity of daily living ) | 26 | 6.5 | |||
| Trying to take something | 20 | 5.0 | |||
| Activity of daily living | 15 | 3.8 | |||
| Lack of explanation | 12 | 3.0 | |||
| Wheelchair | 11 | 2.8 | |||
| Medication of sleeping drug | 11 | 2.8 | |||
| Walker | 4 | 1.0 | |||
| Wet floors | 4 | 1.0 | |||
| Central nerve disorders (Parkinson’s disease) | 3 | 0.8 | |||
| Difference in grade | 2 | 0.5 | |||
| Walk on crutches | 1 | 0.3 | |||
| Waterdrop | 1 | 0.3 | |||
| Things in passageway | 0 | 0.0 | |||
| Fall | 33 | 8.3 | Bed guard | 13 | 3.3 |
| Restlessness | 10 | 2.5 | |||
| Judgement of necessity of physical restraint | 7 | 1.8 | |||
| Postoperative delirium | 2 | 0.5 | |||
| Senile dementia | 1 | 0.3 | |||
| Cognitive impairment | 0 | 0.0 | |||
| Care and life of medical treatment | 143 | 35.8 | Self-management of drugs (others) | 15 | 3.8 |
| Medication of sleeping drug | 13 | 3.3 | |||
| Self-management drugs (absent and/or staying out overnight without leave) | 6 | 1.5 | |||
| Conveyance and transport (others) | 6 | 1.5 | |||
| Nonfulfillment of required rest in bed | 4 | 1.0 | |||
| Collision | 2 | 0.5 | |||
| Conveyance and transport (mistake) | 1 | 0.3 | |||
| Physical restriction and restraint | 1 | 0.3 | |||
| Conveyance and transport (forgetting) | 0 | 0.0 | |||
| Accidental ingestion | 0 | 0.0 | |||
| Others | 95 | 23.8 | |||
| Hospital meals and nourishment | 52 | 13.0 | Mistake of dietary management | 16 | 4.0 |
| Forgetting of delayed meal | 2 | 0.5 | |||
| Mistake of food requirement | 2 | 0.5 | |||
| Forgetting of suspended meal | 1 | 0.3 | |||
| Others | 31 | 7.8 |