Volume 10, Number 4—April 2004
Research
SARS Transmission, Risk Factors, and Prevention in Hong Kong
Joseph T.F. Lau*
, Hiyi Tsui*, Mason Lau*, and Xilin Yang*
, Hiyi Tsui*, Mason Lau*, and Xilin Yang*
Table 2
Preventive measures and risk factors reported by cases and controlsa
| Factors | Caseb | Controlc | Matched univariate OR (95% CI) | Matched multivariate OR (95% CI) | p valued | |
|---|---|---|---|---|---|---|
| % visited mainland China (reference=no) |
12.7 |
6.5 |
2.09 (1.33 to 3.27)e |
1.95 (1.11 to 3.42) |
0.020 |
|
| % visited PWH (reference=no) |
3.6 |
0.5 |
8.27 (2.32 to 29.49)e |
7.07 (1.62 to 30.75) |
0.009 |
|
| % visited other hospitals/clinics (reference=no) |
40.7 |
17.0 |
3.36 (2.49 to 4.54) |
3.70 (2.54 to 5.39) |
<0.001 |
|
| % visited Amoy Gardens (reference=no) |
15.5 |
2.0 |
9.10 (4.87 to 17.00)e |
7.63 (3.77 to 15.43) |
<0.001 |
|
| % visited crowded places frequently (reference=occasionally/seldom/no) |
21.9 |
20.8 |
1.07 (0.76 to 1.50)
NS |
- |
- |
|
| % contacted someone with fever or influenza (reference=no) |
9.0 |
6.4 |
1.42 (0.87 to 2.32)
NS |
- |
- |
|
| % social contact with someone who visited a patient in a hospital (reference=no) |
8.2 |
5.2 |
1.66 (0.96 to 2.85)
NS |
- |
- |
|
| % social contact with medical personnel (reference=no) |
7.6 |
8.6 |
0.87 (0.52 to 1.44)
NS |
- |
- |
|
| % had a SARS case in the housing estate (reference=no) |
6.6 |
8.5 |
0.76 (0.44 to 1.31)
NS |
- |
- |
|
| % disinfected the living quarters thoroughly (reference=no) |
46.6 |
74.5 |
0.30 (0.23 to 0.39)e |
0.41 (0.29 to 0.58) |
<0.001 |
|
| Wore a mask in public places frequently (reference=occasionally /seldom/no) |
27.9 |
58.7 |
0.27 (0.20 to 0.37)e |
0.36 (0.25 to 0.52) |
<0.001 |
|
| Washed hands 11 or more times per day (reference=1–10 times/day) | 18.4 | 33.7 | 0.44 (0.31 to 0.63)e | 0.58 (0.38 to 0.87) | 0.008 | |
aN.S., not significant; OR, odds ratio; CI, confidence interval; -, not used by the multivariate analyses. The reference time period was the 10 days before the date of the patient’s onset of fever.
bn = 330.
cn = 660.
dp values for multivariate OR.
ep<0.005.
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