Table 3. Development of severe acute respiratory syndrome (SARS) in healthcare workers, depending on time spent in index patient’s room (N=31)a.
| Time spent in index patient’s room | No. (%) healthcare workers with specified exposure with SARS | No. (%) healthcare workers without specified exposure with SARS | Odds of developing SARS after specified exposure | 95% CI for OR | p value | |
|---|---|---|---|---|---|---|
|
<10 min |
0/11 |
6/20 (30) |
0.097b |
(0.005 to 1.91)b |
0.047 |
|
|
>31 min |
5/12 (42) |
1/19 (5) |
12.9 |
(1.27 to 131) |
0.014 |
|
| >4 h | 3/4 (75) | 3/27 (11) | 24.0 | (1.85 to 311) | 0.003 | |
aCI, confidence interval; OR, odds ratio. bThese logit estimators use a correction of 0.5 in every cell of the table that contains a zero.