Rural Residents in China Are at Increased Risk of Exposure to Tick-Borne Pathogens Anaplasma phagocytophilum and Ehrlichia chaffeensis

Table 3

The seroprevalence of E. chaffeensis and A. phagocytophilum by age.

Age	E. chaffeensis		A. phagocytophilum		OR (95% CI)	𝑃 value
	Number positives/total number	Seropositivity rate % (95% CI)	Number positives/total number	Seropositivity rate % (95% CI)
Rural
2–19	105/937	11.2 (9.2–13.2)	139/936	14.8 (12.5–17.1)	0.72 (0.6–1.0)	0.02
20–29	241/1574	15.3 (13.5–17.1)	318/1574	20.2 (18.2–22.2)	0.71 (0.6–0.9)	0.0003
30–39	217/1670	13.0 (11.4–14.6)	423/1670	25.3 (23.2–27.4)	0.44 (0.4–0.5)	<0.0001
40–49	147/1770	8.3 (7.0–9.6)	246/1770	13.9 (12.3–15.5)	0.56 (0.5–0.7)	<0.0001
50–59	70/1137	6.2 (4.8–7.6)	124/1137	10.9 (9.1–12.7)	0.5 (0.4–0.7)	<0.0001
>60	11/234	4.6 (1.9–7.3)	16/234	6.8 (3.7–10.0)	0.67 (0.3–1.5)	0.3
Urban
18–29	5/370	1.3 (0.2–2.5)	4/370	1.1 (0–2.2)	1.3 (0.3–4.7)	1.0
30–39	3/138	2.1 (0.3–4.5)	3/138	2.1 (0.3–4.5)	1.0 (0.2–5.0)	1.0
40–49	7/136	5.1 (1.4–8.8)	3/136	2.2 (0.3–4.7)	2.4 (0.6–9.5)	0.2
50–59	3/98	3.0 (0.3–6.3)	1/98	1.0 (0.9–3.0)	3.0 (0.3–29.9)	0.6
>60	2/77	2.5 (1.0–6.0)	1/77	1.3 (1.2–3.8)	2.0 (0.2–22.8)	1.0