Table 1. Number of sites and health facilities selected in the 2015 nationwide Tuberculosis Information Management System (TBIMS) underreporting survey in China.

Administrative level	Total regions	Total No. of health facilities			Sampled regions	No. of sampled health facilities
		TB DHF	TB or infectious disease-specific hospitals	General health facilities		TB DHF	TB or infectious disease-specific hospitals	General health facilities
Abbreviation: DHF=designated health facility, TB=tuberculosis. *Generally there should be at least one DHF in each county or district, while in reality plural counties/districts may share the same DHF and upper-level DHF could also represent the role of lower DHF in its location area. Hence, there were less selected county-level DHFs than selected number of counties/districts.
Province	32	58	11	764	32	18	7	40
Prefecture	348	304	59	1,834	116	88	12	137
County/district	3,093	2,812	0	6,825	436	348*	0	335