TABLE 3.

Univariate and multivariable regression analysis on the risk factors of genomic clustering.

Characteristics	Total (N)	Clustered (N/%)	Univariate analysis		Multivariable regression
			COR (95% CI)	P	AOR (95% CI)	P
Age (y)
<65	196	69 (35.20)	2.69 (1.60, 4.53)	<0.01	3.11 (1.76, 5.49)	<0.0001
≥65	149	25 (16.78)	Ref
Occupation
Student	24	11 (45.83)	2.43 (1.05, 5.63)	0.03	1.54 (0.62, 3.84)	0.35
Non-student	321	83 (25.86)	Ref
Census register
Resident	277	82 (29.60)	1.96 (0.99, 3.85)	0.04	2.43 (1.18, 4.99)	0.02
Migrant	68	12 (17.65)	Ref
Health system delay
≥14 days	56	23 (41.07)	2.14 (1.18, 3.88)	0.01	2.57 (1.34, 4.95)	0.01
<14 days	289	71 (24.57)	Ref
Beijing genotype strains
Yes	298	88 (29.53)	2.86 (1.17, 6.99)	0.02	3.35 (1.32, 8.53)	0.01
No	47	6 (12.77)	Ref
Resistance to INH
Yes	43	19 (44.19)	2.40 (1.24, 4.62)	0.01	2.36 (1.15, 4.88)	0.02
No	302	75 (24.83)	Ref

The bold values mean these factors were statistically significant.