Table 3. Epidemiological factors associated with seropositivity to Scrub typhus group (STG) rickettsioses in Bhutan.

Variables	COR	95% CI		p value	AOR	95% CI		p value
Age group (years)
13–25	Ref.
26–40	1.49	0.88	2.50	0.138	1.91	1.01	3.63	0.048*
41–55	2.21	1.29	3.79	0.004*	2.37	1.24	4.54	0.009*
> 55	2.68	1.56	4.61	<0.001*	3.14	1.59	6.20	0.001*
Occupation
Office workers	Ref.
Herders	0.58	0.26	1.29	0.183	1.94	0.62	6.09	0.254
Farmers	0.26	0.14	0.47	<0.001*	2.43	1.13	5.20	0.023*
Students	0.17	0.05	0.56	0.004*	1.26	0.29	5.47	0.755
Housewives	0.65	0.43	0.99	0.043	1.97	0.94	4.13	0.074
Unemployed	0.74	0.34	1.62	0.453	2.26	0.76	6.75	0.144
Districts
Chukha	Ref.
Mongar	0.33	0.16	0.66	0.002	0.42	0.17	1.02	0.056
Punakha	0.24	0.11	0.52	<0.001*	0.21	0.08	0.54	0.001*
Samtse	0.72	0.39	1.31	0.281	0.82	0.40	1.68	0.584
Thimphu	0.12	0.04	0.31	<0.001*	0.96	0.17	5.33	0.962
Trashigang	0.51	0.27	0.97	0.039	0.75	0.32	1.72	0.493
Trongsa	1.76	1.00	3.09	0.048*	3.44	1.53	7.74	0.003*
Zhemgang	1.70	0.97	2.98	0.066	1.63	0.81	3.28	0.174
Altitude
Low	Ref.
Medium	0.70	0.47	1.05	0.085	0.84	0.45	1.57	0.577
High	0.15	0.07	0.32	<0.001*	0.11	0.03	0.44	0.002*
Animal contact
No	Ref.
Yes	1.66	1.17	2.36	0.005	1.68	1.09	2.58	0.018

COR, crude odds ratio; AOR, adjusted odds ration;

*p<0.05