Table 2.

Scrub typhus effect modification by geography

	Urban				Rural				Peri-forest
	N	IgG seroprevalence, %	Risk ratio	95% CI	N	IgG seroprevalence, %	Risk ratio	95% CI	N	IgG seroprevalence, %	Risk ratio	95% CI
Gender
Male	157	10.2	Ref	–	204	26.0	Ref	–	144	12.5	Ref	–
Female	270	18.5	1.8	1.0–3.3	372	29.3	1.1	0.8–1.6	206	14.6	1.2	0.7–2.0
Age-group (years)
0–20	36	8.3	Ref	–	41	14.6	Ref	–	17	23.5	Ref	–
21–30	90	4.4	0.5	0.1–2.4	109	14.7	1.0	0.5–1.9	95	8.4	0.4	0.2–0.8
31–40	114	9.7	1.2	0.3–5.0	125	28.8	2.0	0.8–4.7	81	11.1	0.5	0.2–1.0
41–50	83	21.7	2.6	0.7–9.4	118	33.9	2.3	1.1–5.0	62	6.5	0.3	0.1–0.9
51–60	61	24.6	3.0	0.613.9	114	32.5	2.2	0.9–5.5	54	31.5	1.3	0.5–3.5
> 60	43	34.9	4.2	1.1–15.7	69	39.1	2.7	1.1–6.7	41	14.6	0.6	0.2–2.1
Education level
None	32	28.1	Ref	–	129	31.0	Ref	–	185	14.1	Ref	–
Primary	85	28.2	1.0	0.7–1.4	158	39.9	1.3	0.8–2.1	25	8.0	0.6	0.1–2.3
Middle	104	11.5	0.4	0.2–0.7	97	19.6	0.6	0.3–1.2	90	16.7	1.2	0.5–3.1
High school	154	11.7	0.4	0.3–0.7	132	23.5	0.8	0.4–1.3	35	11.4	0.8	0.3–2.4
Graduate	52	5.8	0.2	0.1–0.6	59	13.6	0.4	0.2–0.9	15	6.7	0.5	0.1–2.3
Agricultural work
No	394	12.9	Ref	–	274	24.5	Ref	–	49	10.2	Ref
Yes	33	45.5	3.5	2.4–5.2	302	31.5	1.3	0.9–1.8	301	14.3	1.4	0.4–4.5
Owns cows
No	395	14.4	Ref	–	245	26.9	Ref		195	13.9	Ref
Yes	32	28.1	1.9	1.0–3.8	329	28.9	1.1	0.8–1.5	155	13.6	1.0	0.5–2.1
Owns poultry
No	418	15.3	Ref		370	26.8	Ref	–	341	13.8	Ref
Yes	9	22.2	1.5	0.3–6.8	205	30.7	1.1	0.7–1.8	9	11.1	0.8	0.2–2.7