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Volume 10, Number 7—July 2004

Research

Q Fever Outbreak in Industrial Setting

Hugo C. van Woerden*Comments to Author , Brendan W. Mason*, Lika K. Nehaul†, Robert Smith*, Roland L. Salmon*, Brendan Healy‡, Manoj Valappil§, Diana Westmoreland§, Sarah de Martin†, Meirion R. Evans*, Graham Lloyd¶, Marysia Hamilton-Kirkwood‡, and Nina S. Williams*
Author affiliations: *National Public Health Service for Wales, Cardiff, United Kingdom; †Department of Public Health, Gwent, United Kingdom; ‡Department of Public Health, Cardiff, United Kingdom; §University Hospital of Wales, Cardiff, United Kingdom; and; ¶Special Pathogens Reference Unit, Wiltshire, United Kingdom

Main Article

Table 2

Attack rates and odds ratios for different areas of work at factory implicated in Q fever outbreak, Newport, Wales, August–September 2002

Category No. of persons working in area
No. of persons working elsewhere
OR (95% CI)
Cases Controls Attack rate (%) Cases Controls Attack rate (%)
Production/factory floor
35
52
40.2
26
29
47.3
0.78 (0.36–1.57)
Dispatch
0
1
0
61
80
43.3
0 (0–71.79)
Dispatch/factory floor
4
4
50.0
57
77
42.5
0.68 (0.14–2.68)
Office
20
10
66.7
41
71
36.6
3.46 (1.38–9.06)
Production-based but sometimes in the office
1
2
33.3
60
79
43.2
0.66 (0.01–12.96)
Design
0
7
0
61
74
45.2
0 (0–0.88)
Sales representatives
0
5
0
61
76
44.5
0 (0–1.42)
Dispatch but sometimes in the office
1
0
100
60
81
42.6
Undefined
Total 61 81 43.0

aOR, odds ratio; CI, confidence interval.

Main Article

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