Table 1.

Temporal clustering of TB incidents in Qinghai, China, 2009–2016

Year	Cluster time frame	Observed cases	Expected cases	RR	LLR	P-value
2009	2009/2/1 to 2009/4/30	1616	1246.49	1.43	68.29	0.001
2010	2010/3/1 to 2010/5/31	1514	1220.95	1.35	44.83	0.001
2011	2011/2/1 to 2011/4/30	1490	1270.14	1.24	24.27	0.001
2012	2012/3/1 to 2012/5/31	1928	1593.41	1.30	44.98	0.001
2013	2013/1/1 to 2013/3/31	1743	1492.52	1.24	26.94	0.001
2014	2014/2/1 to 2014/4/30	1665	1424.98	1.24	25.81	0.001
2015	2015/3/1 to 2015/5/31	2051	1812.53	1.18	20.41	0.001
2016	2016/1/1 to 2016/3/31	2286	1882.90	1.31	54.99	0.001
2009–2016	2015/1/1 to 2016/8/31	12,746	10,291.14	1.32	353.28	0.001