Table 3.

Murine typhus effect modification by geography

	Urban				Rural
	N	IgG seroprevalence, %	Risk ratio	95% CI	N	IgG seroprevalence, %	Risk ratio	95% CI
Gender
Male	270	5.9	Ref	–	372	10.5	Ref	–
Female	157	4.5	1.3	0.4–4.9	204	5.4	1.9	1.0–3.7
Age-group (years)
0–20	36	2.8	Ref	–	41	4.9	Ref	–
21–30	90	5.6	2.0	0.3–11.5	109	5.5	1.1	0.2–5.7
31–40	114	4.4	1.6	0.2–16.3	125	12.0	2.5	0.7–8.1
41–50	83	9.6	3.5	0.6–20.6	118	6.8	1.4	0.3–6.2
51–60	61	1.6	0.6	0.0–10.0	114	11.4	2.3	0.8–6.6
> 60	43	7.0	2.5	0.5–12.8	69	8.7	1.8	0.6–5.5
Education level
None	32	3.1	Ref	–	129	13.2	Ref	–
Primary	85	8.2	2.6	0.2–28.7	158	8.9	0.7	0.3–1.5
Middle	104	4.8	1.5	0.2–11.5	97	4.1	0.3	0.1–0.8
High school	154	5.2	1.7	0.2–16.4	132	9.1	0.7	0.3–1.5
Graduate	52	3.9	1.2	0.1–15.8	59	5.1	0.4	0.1–1.6
Lake/pond within 300 m
No	313	2.9	Ref	–	414	5.8	Ref	–
Yes	114	12.3	4.3	1.4–13.3	162	16.1	2.8	1.3–5.8
House yard has cement floor
No	31	22.6	Ref	–	25	–	Ref	–
Yes	396	4.0	0.2	0.0–0.9	324	–	0.4	0.2–0.8
Pet dog
No	270	2.6	Ref	–	331	5.4	Ref	–
Yes	157	10.2	3.9	1.4–10.8	244	13.1	2.4	1.3–4.6
Owns poultry
No	418	5.5	Ref	–	370	7.8	Ref	–
Yes	9	0.0	–	–	205	10.2	1.3	0.7–2.4