Volume 10, Number 2—February 2004
THEME ISSUE
2004 SARS Edition
SARS Transmission
Probable Secondary Infections in Households of SARS Patients in Hong Kong
Joseph T.F. Lau*
, Mason Lau*, Jean H. Kim*, Eric Wong*, Hi-Yi Tsui*, Thomas Tsang†, and Tze Wai Wong‡
, Mason Lau*, Jean H. Kim*, Eric Wong*, Hi-Yi Tsui*, Thomas Tsang†, and Tze Wai Wong‡
Table 5
Summary of stepwise multivariate logistic regression model predicting “probable secondary infection” within the household levela
| Risk factor | Coefficient | SE | Odds ratio (95% CI) | p value |
|---|---|---|---|---|
| Type of Index Person (IP) |
||||
| Healthcare worker |
1.00 |
|||
| Amoy Gardens Block E residents |
3.074 |
0.487 |
21.62 (8.33 to 56.10) |
<0.001 |
| Amoy Gardens other Block residents |
1.901 |
0.425 |
6.69 (2.91 to 15.39) |
<0.001 |
| Other community member |
1.705 |
0.354 |
5.50 (2.75 to 11.01) |
<0.001 |
| Date of IP’s fever onset |
||||
| Before March 25 |
1.00 |
|||
| On or after March 25 |
–0.696 |
0.235 |
0.50 (0.32 to 0.79) |
<0.001 |
| Duration IP stayed home between fever onset and hospitalization (d) |
||||
| <2 |
1.00 |
|||
| 3–5 |
0.283 |
0.258 |
1.33 (0.80 to 2.20) |
0.274 |
| >6 |
1.045 |
0.265 |
2.84 (1.69 to 4.78) |
<0.001 |
| IP visited by any household member when hospitalized? |
||||
| No |
1.00 |
|||
| Yes | 0.483 | 0.242 | 1.62 (1.01 to 2.60) | 0.046 |
aAge was not significant in the multivariable analysis.
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