Table 1.

Results of association between study subject factors and anti–spotted fever group rickettsial IgM response

Factor		Odds ratio (95% CI)	P-value
Age		1.00 (0.95–1.04)	0.91
Gender	Male	0.82 (0.24–2.76)	0.75
	Female	Ref
History of travel in the last month		1.04 (0.30–3.35)	0.95
History of animal contact		0.54 (0.02–4.00)	0.61
Hospitalization status	Hospitalized	0.19 (0.01–1.54)	0.19
	Status unknown	2.46 (0.07–33.27)	0.55
	Not hospitalized	Ref
Signs and symptoms (positive for presence)	Temperature (°C)	1.74 (0.90–3.39)	0.10
	Headache	2.36 (0.32–50.36)	0.47
	Rash	6.54 (1.72–25.99)	0.01
	Nausea	0.97 (0.23–4.32)	0.96
	Vomit	2.58 (0.67–10.56)	0.17
	Drowsiness	1.48 (0.24–15.96)	0.71
	Abdominal pain	0.49 (0.15–1.60)	0.25
Acute or recent dengue virus infection		7.67 (2.27–34.97)	< 0.01