Table 1. Characteristics of Index Patients and Their Household Contacts with Pandemic or Seasonal Influenza.
| Characteristic | Pandemic Influenza |
Seasonal Influenza* |
P Value† |
|---|---|---|---|
| number (percent) | |||
| Index patients | |||
|
| |||
| No. of patients | 45 (100) | 54 (100) | |
|
| |||
| Age | 0.01 | ||
|
| |||
| ≤5 yr | 2 (4) | 1 (2) | |
|
| |||
| 6–15 yr | 20 (44) | 19 (35) | |
|
| |||
| 16–30 yr | 16 (36) | 10 (19) | |
|
| |||
| 31–50 yr | 6 (13) | 13 (24) | |
|
| |||
| >50 yr | 1 (2) | 11 (20) | |
|
| |||
| Male sex | 23 (51) | 29 (54) | 0.96 |
|
| |||
| Oseltamivir prescribed | 23 (51) | 21 (39) | 0.31 |
|
| |||
| Household contacts | |||
|
| |||
| No. of patients | 130 (100) | 154 (100) | |
|
| |||
| Age | 0.53 | ||
|
| |||
| ≤5 yr | 4 (3) | 4 (3) | |
|
| |||
| 6–15 yr | 18 (14) | 31 (20) | |
|
| |||
| 16–30 yr | 19 (15) | 24 (16) | |
|
| |||
| 31–50 yr | 64 (49) | 62 (40) | |
|
| |||
| >50 yr | 25 (19) | 33 (21) | |
|
| |||
| Male sex | 51 (39) | 61 (40) | 0.95 |
*
Seasonal influenza includes both H1N1 and H3N2 nonpandemic strains of influenza A.
†
P values were calculated by means of the chi-square test or Fisher’s exact test.