Table 2 Probabilities of at least one secondary case in the household
| Â | n | Any secondary infections in household | |||||
|---|---|---|---|---|---|---|---|
| Â | Â | SAR | (95% CI) | Univariate OR | (95% CI) | Multivariate OR | (95% CI) |
Index oseltamivi usage from his/her onset | Â | Â | Â | Â | Â | Â | Â |
   Within 1 day | 29 | 0.17 | (0.06, 0.36) | 0.47 | (0.16, 1.37) | 0.58 | (0.19, 1.75) |
   1-2 days | 11 | 0.27 | (0.06, 0.61) | 0.85 | (0.21, 3.45) | 1.15 | (0.27, 4.99) |
   3+ days/No usage | 95 | 0.31 | (0.21, 0.41) | - |  | - |  |
Household with adult index | 37 | 0.19 | (0.08, 0.35) | - | Â | - | Â |
Household with child index | 98 | 0.31 | (0.22, 0.41) | 1.89 | (0.75, 4.78) | 1.30 | (0.47, 3.57) |
Household size (# of ppl) | Â | Â | Â | Â | Â | Â | Â |
   ≤ 3 | 48 | 0.15 | (0.06, 0.28) | 1.00 |  | - |  |
   4 | 41 | 0.34 | (0.20, 0.51) | 3.04 | (1.09, 8.50) | 2.81 | (0.98, 8.10) |
   ≥ 5 | 46 | 0.35 | (0.21, 0.50) | 3.12 | (1.14, 8.54) | 2.73 | (0.94, 7.88) |