Longitudinal Analysis of Prevalence and Risk Factors of Rifampicin-Resistant Tuberculosis in Zhejiang, China

Table 3

Multivariate analysis of factors associated with drug-resistant TB among new cases and previously treated cases in 2013.

Risk factor	New cases				Previously treated cases
	AOR (95% CI), drug-resistant TB		AOR (95% CI), MDR		AOR (95% CI), drug-resistant TB		AOR (95% CI), MDR
Age (years)		0.787		0.090		0.568		0.143
<20 yr	1		1		NA	NA	NA	NA
20–39 yr	0.94 (0.44–1.99)	0.867	NA	NA	1		1
40–59 yr	0.86 (0.55–1.33)	0.490	0.31 (0.46–4.49)	0.141	0.66 (0.17–2.50)	0.536	0.39 (0.06–2.42)	0.311
≥60 yr	1.06 (0.69–1.64)	0.798	1.44 (0.47–4.30)	0.533	1.21 (0.38–3.86)	0.750	1.76 (0.42–7.30)	0.437
Sex
Male	0.79 (0.55–1.14)	0.205	2.67 (0.88–8.08)	0.082	1.32 (0.46–3.81)	0.602	3.07 (0.83–11.3)	0.093
Female	1				1		1
Occupation
Farmer	1.10 (0.77–1.58)	0.603	1.42 (0.47–4.30)	0.538	1.50 (0.52–4.38)	0.456	2.20 (0.56–8.67)	0.259
Others	1				1		1
Diabetes
Yes	1.15 (0.67–1.97)	0.612	1.15 (0.29–4.50)	0.844	1.14 (0.28–4.61)	0.852	1.39 (0.23–8.34)	0.719
No	1				1		1
Hepatitis B virus infection
Yes	0.97 (0.50–1.89)	0.940	1.44 (0.65–3.16)	0.366	3.96 (0.76–20.72)	0.103	1.65 (0.72–3.77)	0.239
No	1		1		1		1
Duration of treatment with TB drugs in the first episode of TB
<6 months	NA	NA	NA	NA	0.40 (0.16–0.97)	0.043^†	0.24 (0.07–0.81)	0.022^†
≥6 months					1		1
Medical facility providing first TB treatment
TB clinic system					1		1
General hospital or other TB hospital	NA	NA	NA	NA	0.51 (0.18–1.47)	0.21197	0.08 (0.01–0.72)	0.025^†

TB: tuberculosis, AOR: adjusted odds ratio, MDR-TB: multidrug-resistant tuberculosis, CI: confidence interval; NA: not applicable. ^†: . Other occupation indicates the following: Worker, Migrant labourer, Students, Retiree, Catering staff, etc.