Table 2. Prevalence of IgG antibodies to O. tsutsugamushi among the surveyed population (n = 280).

Aboriginal subgroups	No. seropositive/total population (%)	95% CI
Semelai	13/41(31.7)	17.9
Semai Pahang	12/33(36.4)	1.9–6.7
Temiar	11/73(15.1)	1.4–6.2
Temuan	8/38(21.1)	0.9–4.9
Semai Perak	5/33(15.2)	0.3–3.2
Orang Kuala	1/48(2.1)	−0.3–1.1
Mah Meri	0/14(0.0)	0
Age groups (years old)
Below 12	3/44(6.8)	−0.1–2.3
12–17	19/122(15.6)	3.9–9.8
18 and above	28/114(24.6)	6.5–13.5
Gender
Male	15/112(13.4)	2.8–8.2
Female	35/168(20.8)	8.7–16.4
Total	50/280(17.9)	13.4–22.4