Table 1.

Key Details About the ICU-HAI Registry

	HAI System	EMR System	ICU System
Methods of data collection	Prospective surveillance by infection control practitioners. Basic information were extracted from EMR	Routinely collected health data from clinical process	Critical care information recorded by nurse
Information recorded	Catheterization information, hospital-acquired infection, prevention and control measures	Demographics, diagnosis, laboratory and microbiology tests, prescription, operation, admissions records, discharge summaries and costs	Shift records, nurse notes, vital signs, life supports, checklists
Frequency of data collection	Prospective surveillance data were collected every day; basic information were extracted in real time	Same as actual clinical process: admissions records were recorded within 24 hrs of admission;	Vital signs, life supports, intake and output volume were recorded every hour; shift records were recorded every 8 hrs; APACHE score were recorded within 24 hrs of admission
Follow-up time	During ICU stay	During hospital stay	During ICU stay
Department coverage	Six ICUs of WCH	Both ICU and non-ICU	Six ICUs of WCH