Table 3.

Pure spatial clustering of P. falciparum cases in China during 2005–2014

Year	Clusters	Latitude	Longitude	N	Observed cases	Expected cases	RR	p value
2005	Most likely	24.73918	98.31948	10	2545	27.18	335.72	0.001
	Secondary	21.08838	110.32950	25	198	103.24	1.97	0.001
2006	Most likely	24.03683	97.80955	13	2265	28.68	348.14	0.001
2007	Secondary	24.73918	98.31948	9	1118	12.66	249.20	0.001
	Most likely	29.52352	119.90339	1	20	1.55	13.08	0.001
2008	Secondary	24.85646	97.91907	7	590	5.02	255.22	0.001
	Most likely	34.55674	118.78395	4	26	2.85	9.33	0.001
2009	Secondary	24.85646	97.91907	7	508	4.97	192.20	0.001
	Most likely	37.52641	103.33228	8	22	0.92	24.47	0.001
2010	Secondary	24.85646	97.91907	7	529	6.35	133.89	0.001
	Most likely	30.53620	106.41193	11	61	4.63	13.74	0.001
2011	Secondary	24.85646	97.91907	7	213	5.67	45.08	0.001
	Most likely	32.10585	118.76075	38	297	54.25	6.88	0.001
2012	Secondary	23.52086	108.63520	1	112	0.75	167.01	0.001
	Most likely	24.85646	97.91907	31	144	4.39	37.48	0.001
2013	Secondary	23.52086	108.63520	1	955	1.46	1081.9	0.001
	Most likely	32.00298	117.56783	21	134	3.58	39.53	0.001
2014	Secondary	32.00298	117.56783	1	90	1.82	52.79	0.001
	Most likely	23.52086	108.63520	32	56	0.75	77.63	0.001

N number of counties per cluster, RR indicates relative risk for malaria case in the location