Study and Management of a Q Fever Outbreak among Machine Tool Workers in the Basque Country (Spain)

Table 1

Clinical manifestations, exposure levels, and socio-demographic findings of subjects.

Clinical status				Sex				Exposure level (2)
	Age			Male		Female		High		Medium		Low
	N	Mean	95% CI	N	%	N	%	N	%	N	%	N	%
Case (1)
Pneumonia	9	43.3	33.3–53.4	9	100	—	—	9	100	—	—	—	—
Flu-like symptoms	9	39.4	27.9–50.9	9	100	—	—	9	100	—	—	—	—
Asymptomatic	15	46.4	38.4–54.4	15	100	—	—	13	87	2	13	—	—
Noncase	7	35.1	23.7–46.6	3	43	4	100	2	29	1	14	4	100
Total	40			36		4		33		3		4

(1) A case is considered when IgG  ≥  200 and IgM  ≥  80.
(2) Exposure level estimated according to workplace, distance to the workshop, and time spent at the workshop.
N: number of subjects; 95% CI: 95% Confidence Interval.