High incidence and low case detection rate among contacts of tuberculosis cases in Shanghai, China

BMC Infectious Diseases

Table 2 Multivariate analysis on risk factors of TB among TB contacts by demographics and type of contacts

Factors	Odds Ratio	Std. Err.	z	P > z	95% CI
Male vs. Female	1.93	0.49	2.59	0.01	1.17	3.17
Bacterial positive index case vs. negative cases	2.89	2.08	1.47	0.14	0.71	11.84
Biological related family vs. non-biological	1.91	0.478	2.58	0.01	1.17	3.12
Age group (years)
10–19	3.10	2.49	1.4	0.16	0.64	15.01
20–29	3.48	2.58	1.68	0.09	0.81	14.90
30–39	1.12	0.92	0.14	0.89	0.22	5.59
40–49	2.55	1.92	1.24	0.21	0.58	11.16
50–59	1.59	1.26	0.59	0.56	0.34	7.55
60–69	0.87	0.87	−0.14	0.89	0.12	6.22
70–79	2.12	2.14	0.74	0.46	0.29	15.33
80–89	2.42	2.99	0.72	0.47	0.22	27.21
≥ 90	1	(no TB case)
_cons	0.0007467	0.0007688	−6.99	0	0.0000992	0.005618

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