Table 1.

Target population – inpatients

Hospitals	Target population - Inpatients	Annual volume	Monthly turnover	Minimum sample size	% of total target population
QFSH	Medical Inpatient Units	55,561	4500	480	≈10%
	Surgical Inpatient Units	52,768	4400	480	≈10%
LWH	Medical Inpatient Units	6990	583	120	≈21%
	Surgical Inpatient Units	4769	397	120	≈30%

QFSH Qian FoShan hospital. LWH LaiWu hospital