Volume 10, Number 8—August 2004
Research
SARS in Three Categories of Hospital Workers, Hong Kong
Joseph T.F. Lau*
, Xilin Yang*, P.C. Leung*, Louis Chan*, Eliza Wong*, Carmen Fong*, and H.Y. Tsui*
, Xilin Yang*, P.C. Leung*, Louis Chan*, Eliza Wong*, Carmen Fong*, and H.Y. Tsui*Table 3
Attack rate among hospitals by job categories and time period
| Hospital no. | Group N |
Group S |
Group O |
Overalla |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Onset before 7/4 (%) | Onset after 7/4 (%) | Onset before 7/4 (%) | Onset after 7/4 (%) | Onset before 7/4 (%) | Onset after 7/4 (%) | Onset before 7/4 (%) | Onset after 7/4 (%) | |||
| 1 |
0.00 |
0.00 |
0.00 |
0.00 |
0.36 |
0.36 |
0.09 |
0.09 |
||
| 2 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
||
| 3 |
0.40 |
0.80 |
0.00 |
0.96 |
0.00 |
0.00 |
0.20 |
0.60 |
||
| 4 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
||
| 5 |
0.00 |
0.33 |
0.43 |
0.86 |
0.00 |
0.00 |
0.16 |
0.48 |
||
| 6 |
0.00 |
0.95 |
0.28 |
0.55 |
0.23 |
0.00 |
0.13 |
0.58 |
||
| 7 |
0.00 |
0.12 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.07 |
||
| 8 |
0.26 |
0.00 |
0.90 |
0.91 |
0.41 |
0.00 |
0.40 |
0.14 |
||
| 9 |
0.42 |
0.00 |
1.11 |
0.00 |
0.18 |
0.00 |
0.50 |
0.00 |
||
| 10 |
0.26 |
0.26 |
0.19 |
0.96 |
0.00 |
0.00 |
0.17 |
0.31 |
||
| 11 |
0.47 |
0.00 |
1.41 |
0.00 |
0.14 |
0.00 |
0.54 |
0.00 |
||
| 12 |
3.38 |
0.21 |
6.44 |
0.53 |
1.02 |
0.34 |
3.31 |
0.31 |
||
| 13 |
0.87 |
0.00 |
1.42 |
0.00 |
0.00 |
0.00 |
0.68 |
0.00 |
||
| 14 |
1.01 |
0.00 |
2.88 |
0.49 |
0.13 |
0.13 |
1.05 |
0.12 |
||
| 15 |
4.08 |
0.61 |
11.82 |
1.68 |
0.21 |
0.00 |
3.87 |
0.53 |
||
| 16 |
2.36 |
0.40 |
3.27 |
0.68 |
1.07 |
0.46 |
2.18 |
0.47 |
||
| Pooled (16 hospitals) |
0.99 |
0.22 |
2.24 |
0.50 |
0.21 |
0.07 |
0.98 |
0.22 |
||
| Ratio of pooled rates (phase 1 vs. 2) |
4.50:1 |
4.48:1 |
3.00:1 |
4.45:1 |
||||||
| p values (among 16 hospitals) | < 0.001b | < 0.001c | < 0.001c | 0.036c | 0.002c | 0.048c | < 0.001b | < 0.001c | ||
aOverall: all the hospital workers, including all three groups (N, S, and O).
bPearson Chi-square test.
cFisher-Freeman-Halton test.
