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Volume 10, Number 4—April 2004

Research

SARS Transmission, Risk Factors, and Prevention in Hong Kong

Joseph T.F. Lau*Comments to Author , Hiyi Tsui*, Mason Lau*, and Xilin Yang*
Author affiliations: *Chinese University of Hong Kong, Hong Kong, China

Main Article

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.

Main Article

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