A stepped wedge cluster randomized control trial to evaluate the implementation and effectiveness of optimized initiatives in improving quality of care for ST segment elevation myocardial infarction in response to the COVID-19 outbreak

Table 2 Characteristics of sample hospitals, by district

City	District	Population	Land area (km²)	Number of hospitals	STEMI patients	In-hospital mortality
Wuhan	Jianghan	496,289	28.3	3	459	1.53
	Qiaoko	528,604	40.1	4	319	3.13
Suzhou	Gusu	957,500	83.4	4	167	3.86
	Kunshan	1,665,900	931.5	6	157	1.27
Shenzhen	Futian	1,633,700	78.5	4	250	6.00
	Luohu	1,039,900	78.7	3	229	4.37

ISSN: 1748-5908