| n | Secondary infection in household contacts | |||||
---|---|---|---|---|---|---|---|
 |  | SAR | (95% CI) | Univariate OR | (95% CI) | Multivariate OR | (95% CI) |
Index oseltamivir usage from his/her onset | Â | Â | Â | Â | Â | Â | Â |
   Within 1 day | 29 | 0.09 | (0.03, 0.17) | 0.53 | (0.20, 1.37) | 0.57 | (0.20, 1.62) |
   1-2 days | 11 | 0.17 | (0.00,0.33) | 1.06 | (0.30, 3.69) | 1.11 | (0.30, 4.11) |
   3+ days/No usage | 95 | 0.14 | (0.10, 0.19) | - |  | - |  |
Household with adult index | 37 | 0.10 | (0.04, 0.17) | 1.00 | Â | 1.00 | Â |
Household with child index | 98 | 0.14 | (0.10, 0.19) | 1.48 | (0.62, 3.51) | 1.55 | (0.58, 4.15) |
Adult contact* | 217 | 0.09 | (0.05, 0.13) | - | Â | - | Â |
Child contact* | 173 | 0.20 | (0.13, 0.27) | 2.71 | (1.47, 5.02) | 2.79 | (1.50, 5.20) |
Household size (# of ppl) | Â | Â | Â | Â | Â | Â | Â |
   ≤ 3 | 48 | 0.11 | (0.04, 0.20) | - |  | - |  |
   4 | 41 | 0.14 | (0.07, 0.20) | 1.26 | (0.48, 3.30) | 0.93 | (0.32, 2.72) |
   ≥ 5 | 46 | 0.14 | (0.08, 0.20) | 1.25 | (0.48, 3.24) | 0.74 | (0.26, 2.10) |