Table 2.

Results of contact investigation among congregate settings by year (2013–2016).

Year	2013				2014				2015				2016
	No. of CI	No. of contacts	Contacts with TB disease	Contacts with LTBI (%)	No. of CI	No. of contacts	Contacts with TB disease	Contacts with LTBI (%)	No. of CI	No. of contacts	Contacts with TB disease	Contacts with LTBI (%)	No. of CI	No. of contacts	Contacts with TB disease	Contacts with LTBI (%)
Total	1142	145,486	262	14,049	1405	139,562	219	11,838	2639	130,838	272	13,252	3502	146,911	202	12,707
				(10.8)				(10.9)				(14.5)				(18.5)
Schools	750	123,011	192	9581	758	107,795	69	7652	708	74,761	96	4694	659	74,301	58	3182
				(8.6)				(8.6)				(7.8)				(8.8)
Daycare- center/Kindergarten	48	1961	0	392	37	1317	0	237	43	2167	0	228	46	3179	0	296 (15.1)
				(21.0)				(20.1)				(13.5)
Elementary	33	1628	1	215	44	4196	2	361	48	2325	2	278	64	4160	0	289
				(13.6)				(14.3)				(13.6)				(11.1)
Middle	89	12,624	4	886	85	10,329	8	910	62	9868	35	805	58	7617	6	608
				(7.7)				(9.2)				(9.3)				(9.5)
High	276	77,749	104	5913	245	58,043	29	4175	213	41,634	29	2448	183	43,988	38	1325
				(8.0)				(7.8)				(6.6)				(7.3)
College	293	28,246	81	2093	337	33,165	30	1824	329	18,390	30	902	295	14,799	14	619
				(9.8)				(8.5)				(8.5)				(9.1)
Others	11	803	2	82	10	745	0	145	13	377	0	33	13	558	0	45
				(10.7)				(20.7)				(12.6)				(15.3)
Healthcare facilities	81	3621	8	938	202	8827	73	1370	549	21,014	103	3070	856	29,219	83	3203
				(39.8)				(33.8)				(34.8)				(32.8)
Military/Police unit	108	9029	28	1045	135	10,307	32	1000	112	6176	6	565	128	5379	8	426
				(12.7)				(11.6)				(11.4)				(12.5)
Social welfare/Correctional facilities	147	7971	23	2072	189	8906	32	1225	357	11,618	31	1623	574	15,820	30	2013
				(34.8)				(34.1)				(35.1)				(37.8)
Workplaces	31	1326	11	329	91	2889	13	497	845	14,942	31	3034	1167	19,429	22	3598
				(27.8)				(26.4)				(28.0)				(30.8)
Others	25	528	0	84	30	838	0	94	68	2327	5	266	118	2763	1	285
				(17.2)				(12.1)				(14.2)				(13.0)