Table 3 The characteristics of epidemiological factors observed in primary cases between with and without household transmission events
Cases with household influenza transmission (N = 114) | Cases without household influenza transmission (N = 198) | P value | |
|---|---|---|---|
Median onset month | January 2013 | January 2013 | 0.052 |
Median age of primary cases (range) | 11 (6–15) | 12 (6–15) | 0.01 |
Antiviral treatment for primary cases (%) | 107 (93.9) | 189 (95.5) | 0.61 |
Influenza vaccination (%) | 90 (45.3) | 107 (42.7) | 0.79 |
Median absent days (range) | 4.5 (0–10) | 4 (0–14) | 0.009 |