Table 1.

Demographic characteristics of participants.

Variables	Categories	n (%)/(IQR)
Total Participants		2083 (100.00%)
Age (years)		6.20 (3.33, 12.30)
Region	Xinjiang	1170 (56.17%)
	Jiangsu	913 (43.83%)
Sex	Male	1112 (53.38%)
	Female	971 (46.62%)
Ethnic group	Han	1206 (57.90%)
	Kazakh	378 (18.15%)
	Uyghur	316 (15.17%)
	Others	183 (8.79%)
Migration status	Permanent residents	1925 (92.41%)
	Migrants	158 (7.59%)
(MCV doses	0 dose	208 (9.99%)
	1 dose	42 (2.02%)
	2 doses	1550 (74.41%)
	≥3 doses	283 (13.59%)