Table 1.

Demographic characteristics of Brucellosis in Shandong province, 2015–2021

	2015	2016	2017	2018	2019	2020	2021
Annual incidence rate	3.86	4.07	3.25	2.83	2.52	2.41	3.32
Age (/100,000)
0-	2.97	2.57	2.40	2.06	1.65	1.61	1.97
5-	2.96	1.53	1.61	2.37	2.00	1.05	1.15
10-	0.55	0.84	0.43	0.49	0.37	0.55	0.21
15-	0.89	1.54	0.93	0.98	0.41	0.75	0.42
20-	0.59	0.84	0.64	0.52	0.95	0.83	1.21
25-	2.67	3.50	2.64	1.96	1.15	0.83	1.05
30-	3.44	4.24	3.54	3.49	2.05	1.57	2.33
35-	3.62	3.94	3.11	2.60	2.57	2.34	3.17
40-	4.37	4.58	3.28	2.71	2.51	2.42	3.53
45-	4.90	5.69	4.64	3.81	3.81	2.80	4.02
50-	8.62	9.56	8.28	7.50	4.35	4.15	5.77
55-	6.89	6.13	4.48	4.45	5.30	4.93	7.57
60-	9.65	9.25	7.67	6.32	5.27	4.78	6.74
65-	9.88	8.40	6.40	5.47	4.60	5.43	7.53
70-	4.58	4.54	4.31	4.24	3.38	3.79	5.23
75-	1.65	1.92	1.70	1.68	1.80	2.44	2.62
80-	0.74	0.78	0.97	0.68	0.84	0.79	0.86
≥ 85	0.70	0.87	0.46	0.50	0.19	0.67	0.64
Gender (/100,000)
Male	5.44	5.64	4.53	3.89	3.57	3.42	4.70
Female	2.23	2.43	1.90	1.73	1.42	1.35	1.91
Male-to-female ratio	2.5	2.43	2.5	2.36	2.63	2.65	2.53
Population classification (%)
Children	1.32	1.02	1.08	1.34	1.34	1.07	0.95
Student	1.64	2.00	1.42	1.87	1.54	2.47	1.19
Medical workers	0.21	0.15	0.06	0.11	0.19	0.08	0.24
Workers	0.00	0.00	2.76	2.36	2.01	1.56	3.50
Farmer	85.14	85.73	87.64	84.84	86.74	84.75	84.01
Shepherd	0.77	0.32	0.22	0.28	0.47	0.45	0.77
Office clerk	2.20	2.47	1.89	1.52	1.77	1.32	1.54
Housework and unemployment	3.13	2.54	2.63	2.29	3.12	4.86	5.96
Others	5.59	5.76	2.29	5.39	2.82	3.44	1.84