Department of Occupational Safety and Health Chung Shan Medical University Hospital Taichung 40201 TaiwanDepartment of Public Health Chung Shan Medical University Taichung 40201 Taiwan;
Department of Public Health Chung Shan Medical University Taichung 40201 Taiwan;
Department of Internal Medicine Chung Shan Medical University Hospital and Chung Shan Medical University Taichung 40201 Taiwan;
Medical staff; Needle stick and sharps injuries; Overtime work; Healthy body weight; Obesity;