Table 3.31 Types of nosocomial infections before and after intervention Đặc điểm Before (n=1463) After (n=647) p - value n% n% Surgical site infection 33 37.5 2 14.3 0.12 Blood infection 6 6.8 2 14.3 Upper respiratory infection 21 23.9 7 50.0 Hospital pneumonia 12 13.6 0 0.0 Urinary tract infections 7 8.0 2 14.3 Skin and soft tissue infections 5 5.7 1 7.1 Other bacterial infections 4 4.6 0 0.0 After the intervention, upper respiratory tract infection was the most common form of nosocomial infection (7/14 cases, 50.0%).