Table 1.

Demographic characteristics of malaria cases in China, 2010–2014

Variable	Categories	2010		2011		2012		2013		2014
		No.	%	No.	%	No.	%	No.	%	No.	%
Sex (N = 17,725)	Male	3704	77.72	2873	85.66	2363	92.02	3847	95.51	2856	94.92
	Female	1062	22.28	481	14.34	205	7.98	181	4.49	153	5.08
Age (N = 17,725)	<10	237	4.97	117	3.40	36	1.40	22	0.55	16	0.53
	10–19	365	7.66	147	4.38	106	4.13	92	2.28	47	1.56
	20–29	1014	21.28	799	23.82	593	23.09	928	23.04	656	21.80
	30–39	1121	23.52	870	25.94	738	28.74	1159	28.77	802	26.65
	40–49	1052	22.07	967	28.83	797	31.04	1415	35.13	1071	35.59
	50–59	464	9.74	248	7.39	243	9.46	378	9.38	372	12.36
	≥60	513	10.76	206	6.14	55	2.14	34	0.84	45	1.50
Occupation (N = 17,725)	Farmer	2323	48.74	1643	48.99	1098	42.76	2207	54.79	1260	41.87
	Labourer	1107	23.22	569	16.96	392	15.26	588	14.60	405	13.46
	Worker	326	6.84	292	8.71	325	12.66	419	10.40	433	14.39
	Officer	86	1.80	100	2.98	110	4.28	138	3.43	113	3.76
	Other	924	19.39	750	22.36	643	25.03	676	16.78	798	26.52
Purpose of travelling overseas (n = 3220)	Labour export	29	74.36	347	91.80	446	91.21	1525	96.15	680	93.41
	Business trip	1	2.56	9	2.38	7	1.43	18	1.13	11	1.51
	Tourism	1	2.56	4	1.06	5	1.02	10	0.63	7	0.96
	Study	4	10.26	2	0.53	9	1.84	8	0.50	0	0
	Other	4	10.26	16	4.23	22	4.50	25	1.58	30	4.12
Days staying overseas (n = 2124)	Days
	≤30	6	6.59	17	11.72	18	7.17	30	2.36	27	7.34
	31–180	28	30.77	44	30.34	76	30.28	207	16.31	113	30.71
	181–365	25	27.47	40	27.59	69	27.49	516	40.66	104	28.26
	≥366	32	35.16	44	30.34	88	35.06	516	40.66	124	33.70