Volume 10, Number 7—July 2004
Research
Q Fever Outbreak in Industrial Setting
Hugo C. van Woerden*
, 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*
, 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*Table 3
Odds ratios (OR) for different risk factors in Q fever outbreak, Newport, Wales, August–September 2002
| Exposure at work | No. of persons exposed to risk factor |
No. of persons not exposed to risk factor |
OR (95% CI) | ||
|---|---|---|---|---|---|
| Case | Controls | Cases | Controls | ||
| Office refurbished |
24 |
23 |
6 |
15 |
2.61 (0.77–9.57) |
| Never near an external door or window/near a window or door most days |
13 |
10 |
40 |
61 |
1.98 (0.72–5.56) |
| Smoker/never smoked |
15 |
35 |
42 |
48 |
0.49 (0.22–1.08) |
| Saw hay lorry on the docks |
4 |
1 |
56 |
82 |
5.86 (0.55–291.88) |
| Live on a farm |
1 |
3 |
72 |
76 |
0.35 (0.01–4.53) |
| Regularly handle compost |
1 |
9 |
68 |
83 |
0.14 (0.00–1.03) |
| Contact with animal births or miscarriages | 0 | 6 | 39 | 54 | 0.00 (0–1.26) |
aCI, confidence interval.
