1. Non-work factors: Occupational health mainly includes safety and health problems at work, while lifestyle, environmental pollution, eating habits and other non-work factors will also affect people's health, but they do not belong to the category of occupational health.
2. Mental health: Mental health is an important part of people's physical and mental health, but it does not belong to the category of occupational health. However, occupational stress and psychological burden may affect people's mental health.
3. Genetic factors: Genetic factors are an important factor affecting people's health, but genetic factors do not belong to the category of occupational health because they are not caused by working environment and working conditions.