Table 1.

Epidemiological characteristics of local and non-local cases in Xi'an from 2008 to 2021.

Characteristics	Reporting cases (n = 1,989)	Local cases (n = 505)	Non-local cases (n = 1,484)	P -value
Gender
Male	1,450 (72.90%)	346 (68.51%)	1,104 (74.39%)	0.010
Female	539 (27.10%)	159 (31.49%)	380 (25.61%)
Age	49.00 (34.00–57.00)	49.00 (35.50–59.00)	48.00 (33.00–57.00)	0.113
Occupation
Rural workers	1,544 (77.63%)	359 (71.09%)	1,186 (79.92%)	<0.001
Non-rural workers	445 (22.37%)	146 (28.91%)	298 (20.08%)
Diagnostic delays
≤30 days	1,661 (83.51%)	443 (87.72%)	1,218 (82.07%)	<0.001
31–60 days	157 (7.89%)	34 (6.73%)	123 (8.29%)
≥61 days	171 (8.60%)	28 (5.55%)	143 (9.64%)
Reporting institution
CDC	37 (1.86%)	15 (2.97%)	22 (1.48%)	0.033
Non-CDC	1,952 (98.14%)	490 (97.03%)	1,462 (98.52%)